./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/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_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:42:02,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:42:02,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:42:02,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:42:02,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:42:02,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:42:02,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:42:02,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:42:02,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:42:02,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:42:02,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:42:02,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:42:02,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:42:02,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:42:02,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:42:02,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:42:02,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:42:02,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:42:02,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:42:02,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:42:02,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:42:02,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:42:02,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:42:02,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:42:02,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:42:02,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:42:02,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:42:02,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:42:02,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:42:02,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:42:02,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:42:02,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:42:02,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:42:02,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:42:02,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:42:02,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:42:02,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:42:02,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:42:02,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:42:02,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:42:02,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:42:02,254 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:42:02,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:42:02,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:42:02,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:42:02,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:42:02,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:42:02,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:42:02,310 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:42:02,311 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:42:02,311 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:42:02,311 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:42:02,312 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:42:02,313 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:42:02,313 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:42:02,313 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:42:02,313 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:42:02,314 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:42:02,314 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:42:02,314 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:42:02,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:42:02,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:42:02,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:42:02,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:42:02,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:42:02,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:42:02,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:42:02,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:42:02,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:42:02,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:42:02,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:42:02,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:42:02,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:42:02,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:42:02,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:42:02,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:42:02,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:42:02,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:42:02,323 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:42:02,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:42:02,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:42:02,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:42:02,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:42:02,324 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_0ea2dd4a-3850-4cfc-b989-ac167103fd27/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 [2021-11-23 02:42:02,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:42:02,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:42:02,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:42:02,606 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:42:02,608 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:42:02,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-11-23 02:42:02,697 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/data/835c5824c/c5ae15cbb4834df389de55e79fcf3910/FLAG8b16bead1 [2021-11-23 02:42:03,176 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:42:03,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-11-23 02:42:03,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/data/835c5824c/c5ae15cbb4834df389de55e79fcf3910/FLAG8b16bead1 [2021-11-23 02:42:03,572 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/data/835c5824c/c5ae15cbb4834df389de55e79fcf3910 [2021-11-23 02:42:03,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:42:03,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:42:03,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:42:03,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:42:03,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:42:03,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42283991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03, skipping insertion in model container [2021-11-23 02:42:03,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:42:03,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:42:03,767 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_0ea2dd4a-3850-4cfc-b989-ac167103fd27/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2021-11-23 02:42:03,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:42:03,789 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:42:03,800 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_0ea2dd4a-3850-4cfc-b989-ac167103fd27/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2021-11-23 02:42:03,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:42:03,818 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:42:03,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03 WrapperNode [2021-11-23 02:42:03,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:42:03,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:42:03,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:42:03,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:42:03,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,853 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-11-23 02:42:03,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:42:03,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:42:03,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:42:03,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:42:03,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:42:03,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:42:03,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:42:03,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:42:03,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (1/1) ... [2021-11-23 02:42:03,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:42:03,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:03,931 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:42:03,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:42:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:42:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:42:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:42:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:42:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:42:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:42:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:42:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:42:04,057 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:42:04,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:42:04,250 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:42:04,273 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:42:04,273 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:42:04,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:04 BoogieIcfgContainer [2021-11-23 02:42:04,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:42:04,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:42:04,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:42:04,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:42:04,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:42:03" (1/3) ... [2021-11-23 02:42:04,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323b961d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:04, skipping insertion in model container [2021-11-23 02:42:04,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:03" (2/3) ... [2021-11-23 02:42:04,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323b961d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:04, skipping insertion in model container [2021-11-23 02:42:04,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:04" (3/3) ... [2021-11-23 02:42:04,285 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2021-11-23 02:42:04,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:42:04,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:42:04,356 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:42:04,371 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 02:42:04,371 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:42:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 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 02:42:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:42:04,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:04,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:04,392 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:04,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1167627734, now seen corresponding path program 1 times [2021-11-23 02:42:04,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:04,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115315913] [2021-11-23 02:42:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:04,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:04,552 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 02:42:04,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:04,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115315913] [2021-11-23 02:42:04,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115315913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:04,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:04,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:42:04,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756688119] [2021-11-23 02:42:04,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:04,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:42:04,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:04,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:42:04,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:42:04,594 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 02:42:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:04,620 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-23 02:42:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:42:04,622 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 02:42:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:04,630 INFO L225 Difference]: With dead ends: 22 [2021-11-23 02:42:04,630 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 02:42:04,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:42:04,637 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:04,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:42:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 02:42:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-23 02:42:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 02:42:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-23 02:42:04,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-23 02:42:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:04,670 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-23 02:42:04,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 02:42:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-23 02:42:04,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:42:04,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:04,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:04,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:42:04,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:04,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:04,673 INFO L85 PathProgramCache]: Analyzing trace with hash 250954131, now seen corresponding path program 1 times [2021-11-23 02:42:04,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:04,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903565544] [2021-11-23 02:42:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:04,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:04,720 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 02:42:04,720 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:04,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903565544] [2021-11-23 02:42:04,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903565544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:04,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:04,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:42:04,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389138875] [2021-11-23 02:42:04,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:04,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:42:04,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:04,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:42:04,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:42:04,724 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 02:42:04,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:04,741 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-11-23 02:42:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:42:04,742 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:42:04,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:04,743 INFO L225 Difference]: With dead ends: 21 [2021-11-23 02:42:04,743 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 02:42:04,744 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 02:42:04,745 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:04,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:42:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 02:42:04,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 02:42:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 02:42:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-23 02:42:04,751 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-23 02:42:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:04,752 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-23 02:42:04,752 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), 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 02:42:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-23 02:42:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:42:04,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:04,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:04,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:42:04,753 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:04,754 INFO L85 PathProgramCache]: Analyzing trace with hash 802215450, now seen corresponding path program 1 times [2021-11-23 02:42:04,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:04,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891171418] [2021-11-23 02:42:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:04,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:04,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891171418] [2021-11-23 02:42:04,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891171418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697009097] [2021-11-23 02:42:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:04,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:04,805 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:04,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:42:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:04,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:42:04,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:05,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697009097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869347567] [2021-11-23 02:42:05,041 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:42:05,042 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:05,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:05,052 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:05,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:05,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:05,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:05,238 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:05,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:05,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:05,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:05,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:42:05,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:05,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:42:05,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:05,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:05,735 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:42:05,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 02:42:05,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:05,979 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:06,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [869347567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:06,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:06,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2021-11-23 02:42:06,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617205151] [2021-11-23 02:42:06,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:06,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:42:06,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:06,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:42:06,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:42:06,218 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 02:42:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:06,283 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-11-23 02:42:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:42:06,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 02:42:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:06,287 INFO L225 Difference]: With dead ends: 23 [2021-11-23 02:42:06,287 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 02:42:06,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:42:06,293 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:06,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 02:42:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 02:42:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 02:42:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-23 02:42:06,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-11-23 02:42:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:06,311 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-23 02:42:06,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 02:42:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-23 02:42:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:42:06,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:06,313 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:06,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:06,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:06,538 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:06,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1187067622, now seen corresponding path program 1 times [2021-11-23 02:42:06,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:06,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049193061] [2021-11-23 02:42:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:06,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:42:06,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:06,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049193061] [2021-11-23 02:42:06,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049193061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:06,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805864249] [2021-11-23 02:42:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:06,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:06,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:06,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:06,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:42:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:06,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:42:06,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:42:06,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:42:06,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805864249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:06,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662797525] [2021-11-23 02:42:06,694 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:42:06,694 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:06,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:06,695 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:06,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:06,768 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:42:06,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:42:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:06,832 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:06,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:06,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:06,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:42:07,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:07,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:07,033 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:42:07,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 260 treesize of output 259 [2021-11-23 02:42:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:07,263 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:07,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-23 02:42:07,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:07,326 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:07,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:07,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:07,448 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:07,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:07,460 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:07,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '285#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:07,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:07,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:07,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 02:42:07,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502995309] [2021-11-23 02:42:07,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:07,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:42:07,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:42:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:42:07,822 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 02:42:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:07,845 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-23 02:42:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:42:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 02:42:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:07,846 INFO L225 Difference]: With dead ends: 28 [2021-11-23 02:42:07,846 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:42:07,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:42:07,848 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:07,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:42:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:42:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 02:42:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 02:42:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-23 02:42:07,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-23 02:42:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:07,853 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-23 02:42:07,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 02:42:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-23 02:42:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:42:07,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:07,854 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:07,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:08,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:08,070 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:08,070 INFO L85 PathProgramCache]: Analyzing trace with hash 59351519, now seen corresponding path program 2 times [2021-11-23 02:42:08,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:08,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423067633] [2021-11-23 02:42:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:08,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:42:08,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:08,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423067633] [2021-11-23 02:42:08,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423067633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30217467] [2021-11-23 02:42:08,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:42:08,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:08,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:08,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:08,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:42:08,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:42:08,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:08,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:42:08,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:08,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:42:08,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 15 [2021-11-23 02:42:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:42:08,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:08,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:42:08,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2021-11-23 02:42:08,516 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 02:42:08,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 02:42:08,546 INFO L354 Elim1Store]: treesize reduction 22, result has 33.3 percent of original size [2021-11-23 02:42:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 53 [2021-11-23 02:42:08,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 12 [2021-11-23 02:42:08,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,621 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-23 02:42:08,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 36 [2021-11-23 02:42:08,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-23 02:42:08,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:42:08,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30217467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071504584] [2021-11-23 02:42:08,752 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:42:08,752 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:08,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:08,753 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:08,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:08,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,805 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:08,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:08,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:42:08,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:42:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:08,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:08,940 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:42:08,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 260 treesize of output 259 [2021-11-23 02:42:09,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:09,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:09,148 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:09,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:42:09,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:09,196 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:09,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:09,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:09,287 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:09,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:09,296 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:09,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '448#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:09,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:09,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:09,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2021-11-23 02:42:09,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522278995] [2021-11-23 02:42:09,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:09,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:42:09,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:42:09,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:42:09,652 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 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 02:42:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:09,839 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-23 02:42:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:42:09,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 02:42:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:09,841 INFO L225 Difference]: With dead ends: 35 [2021-11-23 02:42:09,841 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 02:42:09,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:42:09,842 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:09,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 02:42:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-11-23 02:42:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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 02:42:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-23 02:42:09,847 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2021-11-23 02:42:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:09,847 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-23 02:42:09,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 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 02:42:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-23 02:42:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:42:09,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:09,848 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:09,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:10,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:10,049 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash -803985518, now seen corresponding path program 1 times [2021-11-23 02:42:10,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:10,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663904335] [2021-11-23 02:42:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:10,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:42:10,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:10,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663904335] [2021-11-23 02:42:10,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663904335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:10,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703443411] [2021-11-23 02:42:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:10,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:10,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:10,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:10,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:42:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:42:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:42:10,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:42:10,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703443411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:10,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2056386105] [2021-11-23 02:42:10,328 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:42:10,328 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:10,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:10,329 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:10,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:10,381 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:10,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:10,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:42:10,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:10,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:42:10,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:10,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:10,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:10,498 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:42:10,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 02:42:10,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:10,596 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:10,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-23 02:42:10,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:10,638 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:10,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:10,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:10,870 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:10,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:10,877 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:11,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '672#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:11,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:11,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:11,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-23 02:42:11,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044626903] [2021-11-23 02:42:11,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:11,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:42:11,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:11,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:42:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:42:11,293 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 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 02:42:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:11,331 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-23 02:42:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:42:11,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 02:42:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:11,335 INFO L225 Difference]: With dead ends: 42 [2021-11-23 02:42:11,335 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 02:42:11,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:42:11,338 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:11,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:42:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 02:42:11,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-23 02:42:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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 02:42:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-23 02:42:11,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2021-11-23 02:42:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:11,350 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-23 02:42:11,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 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 02:42:11,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-23 02:42:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:42:11,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:11,354 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:11,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:11,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:42:11,562 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:11,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:11,562 INFO L85 PathProgramCache]: Analyzing trace with hash 571138891, now seen corresponding path program 2 times [2021-11-23 02:42:11,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:11,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566286739] [2021-11-23 02:42:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:11,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:42:11,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:11,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566286739] [2021-11-23 02:42:11,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566286739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:11,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439848297] [2021-11-23 02:42:11,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:42:11,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:11,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:11,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:11,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:42:11,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:42:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:42:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 02:42:12,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:12,190 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-23 02:42:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2021-11-23 02:42:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 02:42:12,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439848297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:12,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406661535] [2021-11-23 02:42:12,256 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:42:12,257 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:12,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:12,258 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:12,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:12,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:12,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:12,314 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:12,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:12,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:12,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:12,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:42:12,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:12,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:42:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:12,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:12,448 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:42:12,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 260 treesize of output 259 [2021-11-23 02:42:12,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:12,645 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-23 02:42:12,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:12,683 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:12,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:12,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:12,928 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:12,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:12,935 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:13,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '962#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:13,408 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:13,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:13,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 24 [2021-11-23 02:42:13,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821423862] [2021-11-23 02:42:13,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:13,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:42:13,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:13,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:42:13,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:42:13,411 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:42:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:13,775 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-23 02:42:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 02:42:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 02:42:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:13,776 INFO L225 Difference]: With dead ends: 59 [2021-11-23 02:42:13,777 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 02:42:13,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:42:13,779 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:13,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 02:42:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-11-23 02:42:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 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 02:42:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-23 02:42:13,786 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2021-11-23 02:42:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:13,786 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-23 02:42:13,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:42:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-23 02:42:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:42:13,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:13,788 INFO L514 BasicCegarLoop]: trace histogram [13, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:13,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 02:42:14,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:42:14,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1693520930, now seen corresponding path program 3 times [2021-11-23 02:42:14,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:14,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850820043] [2021-11-23 02:42:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:14,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:42:14,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:14,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850820043] [2021-11-23 02:42:14,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850820043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:14,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600884558] [2021-11-23 02:42:14,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:42:14,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:14,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:14,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:14,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:42:14,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:42:14,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:14,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:42:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:42:14,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:42:14,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600884558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:14,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832714459] [2021-11-23 02:42:14,582 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:42:14,582 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:14,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:14,582 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:14,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:14,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:14,637 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:14,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:14,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:14,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:14,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:42:14,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:14,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:42:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:14,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:14,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:14,739 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:42:14,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 02:42:14,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:14,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:14,854 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:14,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:42:14,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:14,890 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:14,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:15,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:15,135 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:15,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:15,141 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:15,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1331#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:15,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:15,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:15,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2021-11-23 02:42:15,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102186717] [2021-11-23 02:42:15,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:15,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 02:42:15,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:15,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 02:42:15,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=920, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:42:15,493 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 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 02:42:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:15,567 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2021-11-23 02:42:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:42:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 02:42:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:15,569 INFO L225 Difference]: With dead ends: 62 [2021-11-23 02:42:15,569 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 02:42:15,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=920, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:42:15,572 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:15,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 02:42:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-23 02:42:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:42:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-23 02:42:15,589 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 30 [2021-11-23 02:42:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:15,590 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-23 02:42:15,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 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 02:42:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-23 02:42:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:42:15,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:15,595 INFO L514 BasicCegarLoop]: trace histogram [28, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:15,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:15,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:15,818 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1024276521, now seen corresponding path program 4 times [2021-11-23 02:42:15,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:15,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532386363] [2021-11-23 02:42:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:15,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:42:16,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:16,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532386363] [2021-11-23 02:42:16,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532386363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:16,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603451724] [2021-11-23 02:42:16,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:42:16,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:16,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:16,381 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:16,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:42:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:16,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 02:42:16,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:42:16,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:42:17,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603451724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818016697] [2021-11-23 02:42:17,646 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:42:17,646 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:17,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:17,646 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:17,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:17,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:17,692 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:42:17,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:42:17,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:17,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:17,739 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:17,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:17,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:17,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:42:17,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:17,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:17,857 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:42:17,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 260 treesize of output 259 [2021-11-23 02:42:17,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:18,017 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:18,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-23 02:42:18,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:18,052 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:18,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:18,280 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:18,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:18,320 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:18,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1835#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:18,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:18,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:18,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2021-11-23 02:42:18,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758596729] [2021-11-23 02:42:18,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:18,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-23 02:42:18,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-23 02:42:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1851, Invalid=2705, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 02:42:18,774 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 states have internal predecessors, (72), 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 02:42:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:18,888 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2021-11-23 02:42:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-23 02:42:18,889 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-23 02:42:18,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:18,892 INFO L225 Difference]: With dead ends: 92 [2021-11-23 02:42:18,893 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 02:42:18,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1851, Invalid=2705, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 02:42:18,897 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:18,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 02:42:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-23 02:42:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 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 02:42:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-11-23 02:42:18,928 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 45 [2021-11-23 02:42:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:18,929 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-11-23 02:42:18,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 states have internal predecessors, (72), 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 02:42:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-11-23 02:42:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:42:18,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:18,937 INFO L514 BasicCegarLoop]: trace histogram [58, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:18,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:19,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:19,150 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1698972425, now seen corresponding path program 5 times [2021-11-23 02:42:19,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:19,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967804239] [2021-11-23 02:42:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:19,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:42:20,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967804239] [2021-11-23 02:42:20,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967804239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54528387] [2021-11-23 02:42:20,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:42:20,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:20,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:20,736 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:20,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:42:20,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:42:20,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:20,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:42:20,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:20,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:42:21,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19 [2021-11-23 02:42:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-11-23 02:42:21,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:21,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:42:21,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2021-11-23 02:42:21,970 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-23 02:42:21,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 02:42:22,001 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-11-23 02:42:22,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 50 [2021-11-23 02:42:22,041 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-23 02:42:22,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 02:42:22,061 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 02:42:22,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2021-11-23 02:42:22,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:22,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 14 [2021-11-23 02:42:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:22,096 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:42:22,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 1 [2021-11-23 02:42:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-11-23 02:42:22,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54528387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:22,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631917576] [2021-11-23 02:42:22,865 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:42:22,866 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:22,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:22,866 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:22,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:22,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:22,920 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:42:22,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:42:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:22,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:22,975 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:22,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:22,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:23,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:42:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:23,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:23,078 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:42:23,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 02:42:23,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:23,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:23,157 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:23,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:42:23,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:23,199 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:23,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:23,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:23,473 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:23,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:23,484 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:24,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2650#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:24,060 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:24,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:24,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 71 [2021-11-23 02:42:24,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720459518] [2021-11-23 02:42:24,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:24,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-23 02:42:24,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:24,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-23 02:42:24,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1889, Invalid=4273, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 02:42:24,064 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 71 states have internal predecessors, (103), 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 02:42:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:26,662 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-11-23 02:42:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-23 02:42:26,664 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 71 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 02:42:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:26,665 INFO L225 Difference]: With dead ends: 100 [2021-11-23 02:42:26,665 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 02:42:26,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5621, Invalid=13839, Unknown=0, NotChecked=0, Total=19460 [2021-11-23 02:42:26,671 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:26,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 54 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:42:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 02:42:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2021-11-23 02:42:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 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 02:42:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-11-23 02:42:26,680 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2021-11-23 02:42:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:26,680 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-11-23 02:42:26,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 71 states have internal predecessors, (103), 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 02:42:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-11-23 02:42:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 02:42:26,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:26,682 INFO L514 BasicCegarLoop]: trace histogram [59, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:26,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 02:42:26,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:42:26,886 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1118946774, now seen corresponding path program 6 times [2021-11-23 02:42:26,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:26,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087587663] [2021-11-23 02:42:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:26,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:42:28,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087587663] [2021-11-23 02:42:28,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087587663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:28,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235913249] [2021-11-23 02:42:28,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:42:28,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:28,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:28,263 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:28,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:42:28,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:42:28,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-23 02:42:28,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:42:28,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:42:32,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235913249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [93286311] [2021-11-23 02:42:32,246 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:42:32,246 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:32,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:32,246 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:32,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:32,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:32,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:32,284 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:42:32,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:42:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:32,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:32,325 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:32,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:32,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:42:32,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:32,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:32,446 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:42:32,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 260 treesize of output 259 [2021-11-23 02:42:32,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:32,573 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:32,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:42:32,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:32,611 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:32,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:32,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:32,831 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:32,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:32,836 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:33,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3686#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:33,341 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:33,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:33,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 122 [2021-11-23 02:42:33,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914319156] [2021-11-23 02:42:33,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:33,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-23 02:42:33,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-23 02:42:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7524, Invalid=9246, Unknown=0, NotChecked=0, Total=16770 [2021-11-23 02:42:33,351 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 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 02:42:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:33,568 INFO L93 Difference]: Finished difference Result 162 states and 226 transitions. [2021-11-23 02:42:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-23 02:42:33,569 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 02:42:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:33,573 INFO L225 Difference]: With dead ends: 162 [2021-11-23 02:42:33,574 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:42:33,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7524, Invalid=9246, Unknown=0, NotChecked=0, Total=16770 [2021-11-23 02:42:33,578 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:33,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:42:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:42:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 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 02:42:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-11-23 02:42:33,601 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 80 [2021-11-23 02:42:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:33,601 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-11-23 02:42:33,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 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 02:42:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-11-23 02:42:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-23 02:42:33,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:33,604 INFO L514 BasicCegarLoop]: trace histogram [120, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:33,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:33,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:42:33,810 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:33,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:33,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1302174211, now seen corresponding path program 7 times [2021-11-23 02:42:33,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:33,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293815777] [2021-11-23 02:42:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:33,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:42:38,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:38,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293815777] [2021-11-23 02:42:38,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293815777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:38,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931113798] [2021-11-23 02:42:38,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:42:38,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:38,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:38,901 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:38,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:42:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-23 02:42:39,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:42:39,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:42:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931113798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442156853] [2021-11-23 02:42:53,353 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:42:53,354 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:53,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:53,354 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:53,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:53,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:53,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:53,397 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:42:53,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:42:53,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:53,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:53,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:42:53,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:53,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:42:53,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:53,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:53,513 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:42:53,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 02:42:53,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:42:53,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:53,619 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:53,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:42:53,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:53,656 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:53,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:53,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:53,863 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:53,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:53,868 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:54,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5333#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:54,649 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:54,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:54,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 244 [2021-11-23 02:42:54,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502977665] [2021-11-23 02:42:54,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:54,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2021-11-23 02:42:54,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2021-11-23 02:42:54,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29911, Invalid=33341, Unknown=0, NotChecked=0, Total=63252 [2021-11-23 02:42:54,680 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 states have internal predecessors, (256), 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 02:42:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:55,332 INFO L93 Difference]: Finished difference Result 284 states and 409 transitions. [2021-11-23 02:42:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2021-11-23 02:42:55,346 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-23 02:42:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:55,348 INFO L225 Difference]: With dead ends: 284 [2021-11-23 02:42:55,349 INFO L226 Difference]: Without dead ends: 264 [2021-11-23 02:42:55,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=29911, Invalid=33341, Unknown=0, NotChecked=0, Total=63252 [2021-11-23 02:42:55,354 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:55,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:42:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-23 02:42:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-11-23 02:42:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 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 02:42:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2021-11-23 02:42:55,387 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 141 [2021-11-23 02:42:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:55,388 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2021-11-23 02:42:55,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 states have internal predecessors, (256), 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 02:42:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2021-11-23 02:42:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-23 02:42:55,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:55,393 INFO L514 BasicCegarLoop]: trace histogram [242, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:55,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:55,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:55,622 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1683284125, now seen corresponding path program 8 times [2021-11-23 02:42:55,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:55,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943312063] [2021-11-23 02:42:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:55,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 0 proven. 29403 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:43:14,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:14,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943312063] [2021-11-23 02:43:14,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943312063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:43:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336511730] [2021-11-23 02:43:14,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:43:14,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:43:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:43:14,958 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:43:14,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:43:15,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:43:15,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:43:15,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:43:15,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:43:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 29403 trivial. 0 not checked. [2021-11-23 02:43:16,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:43:16,867 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-23 02:43:16,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2021-11-23 02:43:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 29403 trivial. 0 not checked. [2021-11-23 02:43:17,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336511730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:43:17,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1678018594] [2021-11-23 02:43:17,353 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:43:17,353 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:43:17,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:43:17,354 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:43:17,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:43:17,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:17,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:17,401 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:43:17,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:43:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:17,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:17,450 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:43:17,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:43:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:17,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:43:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:17,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:17,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:17,538 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:43:17,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 02:43:17,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:43:17,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:17,614 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:17,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:43:17,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:17,654 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:17,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:17,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:17,905 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:17,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:17,911 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:43:19,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8213#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:43:19,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:43:19,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:43:19,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [244, 10, 10] total 257 [2021-11-23 02:43:19,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104441189] [2021-11-23 02:43:19,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:43:19,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 258 states [2021-11-23 02:43:19,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:19,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 258 interpolants. [2021-11-23 02:43:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29952, Invalid=40008, Unknown=0, NotChecked=0, Total=69960 [2021-11-23 02:43:19,468 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 258 states, 258 states have (on average 1.1085271317829457) internal successors, (286), 257 states have internal predecessors, (286), 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 02:43:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:42,413 INFO L93 Difference]: Finished difference Result 305 states and 310 transitions. [2021-11-23 02:43:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-11-23 02:43:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 258 states, 258 states have (on average 1.1085271317829457) internal successors, (286), 257 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-23 02:43:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:42,416 INFO L225 Difference]: With dead ends: 305 [2021-11-23 02:43:42,416 INFO L226 Difference]: Without dead ends: 274 [2021-11-23 02:43:42,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1276 GetRequests, 767 SyntacticMatches, 1 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36528 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=89743, Invalid=169847, Unknown=0, NotChecked=0, Total=259590 [2021-11-23 02:43:42,427 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:42,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 126 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:43:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-23 02:43:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2021-11-23 02:43:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 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 02:43:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2021-11-23 02:43:42,450 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 263 [2021-11-23 02:43:42,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:42,451 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2021-11-23 02:43:42,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 258 states, 258 states have (on average 1.1085271317829457) internal successors, (286), 257 states have internal predecessors, (286), 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 02:43:42,452 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2021-11-23 02:43:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-23 02:43:42,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:42,456 INFO L514 BasicCegarLoop]: trace histogram [243, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:42,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:43:42,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:43:42,721 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:42,722 INFO L85 PathProgramCache]: Analyzing trace with hash 548327542, now seen corresponding path program 9 times [2021-11-23 02:43:42,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:42,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229847375] [2021-11-23 02:43:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:42,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:44:02,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:02,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229847375] [2021-11-23 02:44:02,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229847375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:02,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035960709] [2021-11-23 02:44:02,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:44:02,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:02,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:02,210 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:02,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:44:02,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:44:02,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:44:02,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 245 conjunts are in the unsatisfiable core [2021-11-23 02:44:02,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:44:03,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:45:00,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035960709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:00,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141846001] [2021-11-23 02:45:00,362 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:45:00,362 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:45:00,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:45:00,363 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:45:00,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:45:00,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:00,398 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:45:00,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:45:00,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:00,432 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:45:00,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:45:00,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:00,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:45:00,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:00,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:00,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:00,509 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:45:00,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 02:45:00,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:45:00,582 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:45:00,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-23 02:45:00,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:00,631 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:45:00,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:45:00,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:00,884 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:45:00,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:45:00,888 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:45:02,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11864#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:45:02,709 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:45:02,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:45:02,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [245, 245, 245] total 490 [2021-11-23 02:45:02,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95496169] [2021-11-23 02:45:02,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:45:02,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 491 states [2021-11-23 02:45:02,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:02,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 491 interpolants. [2021-11-23 02:45:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120316, Invalid=127190, Unknown=0, NotChecked=0, Total=247506 [2021-11-23 02:45:02,751 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 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 02:45:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:07,061 INFO L93 Difference]: Finished difference Result 534 states and 782 transitions. [2021-11-23 02:45:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 490 states. [2021-11-23 02:45:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-11-23 02:45:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:07,065 INFO L225 Difference]: With dead ends: 534 [2021-11-23 02:45:07,065 INFO L226 Difference]: Without dead ends: 512 [2021-11-23 02:45:07,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 544 SyntacticMatches, 1 SemanticMatches, 496 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6832 ImplicationChecksByTransitivity, 77.1s TimeCoverageRelationStatistics Valid=120316, Invalid=127190, Unknown=0, NotChecked=0, Total=247506 [2021-11-23 02:45:07,078 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:07,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:45:07,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-23 02:45:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2021-11-23 02:45:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.00587084148728) internal successors, (514), 511 states have internal predecessors, (514), 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 02:45:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 514 transitions. [2021-11-23 02:45:07,118 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 514 transitions. Word has length 266 [2021-11-23 02:45:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:07,119 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 514 transitions. [2021-11-23 02:45:07,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 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 02:45:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 514 transitions. [2021-11-23 02:45:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-23 02:45:07,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:07,133 INFO L514 BasicCegarLoop]: trace histogram [488, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:07,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 02:45:07,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:45:07,358 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:07,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1986981775, now seen corresponding path program 10 times [2021-11-23 02:45:07,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:07,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380130979] [2021-11-23 02:45:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:07,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:46:29,208 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:29,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380130979] [2021-11-23 02:46:29,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380130979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:46:29,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404023810] [2021-11-23 02:46:29,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:46:29,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:29,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:29,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:29,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:46:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:29,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 3033 conjuncts, 490 conjunts are in the unsatisfiable core [2021-11-23 02:46:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:46:31,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:50:44,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404023810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:50:44,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491489908] [2021-11-23 02:50:44,513 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:50:44,513 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:50:44,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:50:44,514 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:50:44,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:50:44,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:50:44,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:50:44,561 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:50:44,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:50:44,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:50:44,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:50:44,617 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:50:44,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:50:44,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:50:44,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:50:44,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:50:44,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:50:44,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:50:44,744 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:50:44,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 02:50:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:50:44,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:50:44,828 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:50:44,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:50:44,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:50:44,869 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:50:44,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:50:45,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:50:45,081 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:50:45,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:50:45,085 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:50:48,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17945#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-23 02:50:48,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:50:48,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:50:48,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [490, 490, 490] total 980 [2021-11-23 02:50:48,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110306981] [2021-11-23 02:50:48,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:50:48,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 981 states [2021-11-23 02:50:48,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:48,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 981 interpolants. [2021-11-23 02:50:48,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480711, Invalid=494445, Unknown=0, NotChecked=0, Total=975156 [2021-11-23 02:50:48,393 INFO L87 Difference]: Start difference. First operand 512 states and 514 transitions. Second operand has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 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 02:51:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:18,007 INFO L93 Difference]: Finished difference Result 1024 states and 1517 transitions. [2021-11-23 02:51:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 980 states. [2021-11-23 02:51:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2021-11-23 02:51:18,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:18,017 INFO L225 Difference]: With dead ends: 1024 [2021-11-23 02:51:18,018 INFO L226 Difference]: Without dead ends: 1002 [2021-11-23 02:51:18,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2021 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 986 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12225 ImplicationChecksByTransitivity, 334.4s TimeCoverageRelationStatistics Valid=480711, Invalid=494445, Unknown=0, NotChecked=0, Total=975156 [2021-11-23 02:51:18,082 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:18,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:51:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-11-23 02:51:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2021-11-23 02:51:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.002997002997003) internal successors, (1004), 1001 states have internal predecessors, (1004), 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 02:51:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1004 transitions. [2021-11-23 02:51:18,175 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1004 transitions. Word has length 511 [2021-11-23 02:51:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:18,176 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1004 transitions. [2021-11-23 02:51:18,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 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 02:51:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1004 transitions. [2021-11-23 02:51:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2021-11-23 02:51:18,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:18,191 INFO L514 BasicCegarLoop]: trace histogram [978, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:18,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:18,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ea2dd4a-3850-4cfc-b989-ac167103fd27/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:51:18,406 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1747623407, now seen corresponding path program 11 times [2021-11-23 02:51:18,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:18,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087315819] [2021-11-23 02:51:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:18,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat