./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF --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 0a870e8a4a7dff1b238c9b19b47586f7abd44e3f0eb9969b7dad7bbd7f80e506 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:28:13,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:28:13,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:28:13,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:28:13,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:28:13,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:28:13,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:28:13,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:28:13,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:28:13,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:28:13,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:28:13,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:28:13,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:28:13,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:28:13,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:28:13,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:28:13,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:28:13,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:28:13,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:28:13,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:28:13,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:28:13,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:28:13,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:28:13,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:28:13,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:28:13,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:28:13,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:28:13,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:28:13,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:28:13,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:28:13,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:28:13,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:28:13,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:28:13,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:28:13,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:28:13,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:28:13,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:28:13,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:28:13,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:28:13,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:28:13,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:28:13,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:28:13,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:28:13,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:28:13,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:28:13,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:28:13,839 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:28:13,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:28:13,839 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:28:13,840 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:28:13,840 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:28:13,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:28:13,841 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:28:13,841 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:28:13,841 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:28:13,841 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:28:13,842 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:28:13,851 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:28:13,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:28:13,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:28:13,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:28:13,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:28:13,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:28:13,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:28:13,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:28:13,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:28:13,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:28:13,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:28:13,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:28:13,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:28:13,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:28:13,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:28:13,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:28:13,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:13,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:28:13,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:28:13,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:28:13,858 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:28:13,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:28:13,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:28:13,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:28:13,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:28:13,860 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_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a870e8a4a7dff1b238c9b19b47586f7abd44e3f0eb9969b7dad7bbd7f80e506 [2021-11-13 02:28:14,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:28:14,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:28:14,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:28:14,254 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:28:14,255 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:28:14,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-pthread/cs_stack-2.i [2021-11-13 02:28:14,358 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/data/92718e7ac/2a23e56bd9714e909e869227f3b6f4f0/FLAGdfd84139b [2021-11-13 02:28:15,092 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:28:15,093 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/sv-benchmarks/c/seq-pthread/cs_stack-2.i [2021-11-13 02:28:15,138 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/data/92718e7ac/2a23e56bd9714e909e869227f3b6f4f0/FLAGdfd84139b [2021-11-13 02:28:15,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/data/92718e7ac/2a23e56bd9714e909e869227f3b6f4f0 [2021-11-13 02:28:15,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:28:15,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:28:15,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:15,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:28:15,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:28:15,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:15" (1/1) ... [2021-11-13 02:28:15,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a763b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:15, skipping insertion in model container [2021-11-13 02:28:15,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:15" (1/1) ... [2021-11-13 02:28:15,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:28:15,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:28:15,954 WARN L228 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_3e564419-7fc6-4e59-b089-d4219bffc44a/sv-benchmarks/c/seq-pthread/cs_stack-2.i[34556,34569] [2021-11-13 02:28:16,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:16,101 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:28:16,142 WARN L228 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_3e564419-7fc6-4e59-b089-d4219bffc44a/sv-benchmarks/c/seq-pthread/cs_stack-2.i[34556,34569] [2021-11-13 02:28:16,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:16,300 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:28:16,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16 WrapperNode [2021-11-13 02:28:16,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:16,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:16,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:28:16,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:28:16,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:16,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:28:16,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:28:16,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:28:16,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:28:16,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:28:16,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:28:16,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:28:16,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (1/1) ... [2021-11-13 02:28:16,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:16,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:16,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:28:16,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:28:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:28:16,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:28:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:28:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2021-11-13 02:28:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2021-11-13 02:28:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:28:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:28:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:28:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2021-11-13 02:28:16,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2021-11-13 02:28:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 02:28:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 02:28:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure get_top [2021-11-13 02:28:16,742 INFO L138 BoogieDeclarations]: Found implementation of procedure get_top [2021-11-13 02:28:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:28:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-11-13 02:28:16,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-11-13 02:28:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-11-13 02:28:16,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-11-13 02:28:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-13 02:28:16,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-13 02:28:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 02:28:16,744 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 02:28:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-11-13 02:28:16,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-11-13 02:28:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:28:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:28:16,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:28:17,046 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:17,047 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0 != ~__CS_ret~0 % 256;#res := 0; [2021-11-13 02:28:17,076 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L930-1: assume 0 != ~__CS_ret~0 % 256; [2021-11-13 02:28:17,077 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L930-1: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:17,077 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:17,077 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume 0 != ~__CS_ret~0 % 256; [2021-11-13 02:28:17,077 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##7: assume 0 != ~__CS_ret~0 % 256; [2021-11-13 02:28:17,078 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:17,078 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:17,078 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0 != ~__CS_ret~0 % 256; [2021-11-13 02:28:17,078 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L930: SUMMARY for call __CS_cs(); srcloc: null [2021-11-13 02:28:17,589 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:17,589 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume 0 != ~__CS_ret~0 % 256;push_#res#1 := 0; [2021-11-13 02:28:17,590 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:17,590 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##53: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2021-11-13 02:28:17,590 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##58: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:17,591 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##57: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2021-11-13 02:28:17,591 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:17,591 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2021-11-13 02:28:17,591 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1002: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2021-11-13 02:28:17,591 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1002: assume !(0 != ~__CS_ret~0 % 256);pop_#res#1 := 0; [2021-11-13 02:28:17,592 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L986-4: SUMMARY for call __CS_cs(); srcloc: null [2021-11-13 02:28:17,592 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##111: assume 0 != ~__CS_ret~0 % 256;push_#res#1 := 0; [2021-11-13 02:28:17,592 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##112: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:28:20,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:28:20,399 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 02:28:20,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:20 BoogieIcfgContainer [2021-11-13 02:28:20,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:28:20,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:28:20,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:28:20,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:28:20,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:28:15" (1/3) ... [2021-11-13 02:28:20,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20111d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:20, skipping insertion in model container [2021-11-13 02:28:20,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:16" (2/3) ... [2021-11-13 02:28:20,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20111d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:20, skipping insertion in model container [2021-11-13 02:28:20,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:20" (3/3) ... [2021-11-13 02:28:20,413 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_stack-2.i [2021-11-13 02:28:20,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:28:20,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:28:20,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:28:20,485 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 [2021-11-13 02:28:20,486 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:28:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 196 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 113 states have internal predecessors, (159), 75 states have call successors, (75), 9 states have call predecessors, (75), 9 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2021-11-13 02:28:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:28:20,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:20,589 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:20,590 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:20,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1915960179, now seen corresponding path program 1 times [2021-11-13 02:28:20,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:20,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141809833] [2021-11-13 02:28:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:20,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-13 02:28:21,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:21,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141809833] [2021-11-13 02:28:21,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141809833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:21,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:21,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:21,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154191774] [2021-11-13 02:28:21,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:21,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:21,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:21,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:21,458 INFO L87 Difference]: Start difference. First operand has 196 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 113 states have internal predecessors, (159), 75 states have call successors, (75), 9 states have call predecessors, (75), 9 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-13 02:28:23,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:23,860 INFO L93 Difference]: Finished difference Result 383 states and 609 transitions. [2021-11-13 02:28:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:23,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 65 [2021-11-13 02:28:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:23,898 INFO L225 Difference]: With dead ends: 383 [2021-11-13 02:28:23,899 INFO L226 Difference]: Without dead ends: 344 [2021-11-13 02:28:23,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:23,914 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 257 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2192.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.14ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2271.76ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:23,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1004 Invalid, 88 Unknown, 0 Unchecked, 18.14ms Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 1 Unknown, 0 Unchecked, 2271.76ms Time] [2021-11-13 02:28:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-13 02:28:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 340. [2021-11-13 02:28:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 192 states have (on average 1.46875) internal successors, (282), 196 states have internal predecessors, (282), 131 states have call successors, (131), 17 states have call predecessors, (131), 16 states have return successors, (135), 128 states have call predecessors, (135), 131 states have call successors, (135) [2021-11-13 02:28:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 548 transitions. [2021-11-13 02:28:24,112 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 548 transitions. Word has length 65 [2021-11-13 02:28:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:24,112 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 548 transitions. [2021-11-13 02:28:24,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-13 02:28:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 548 transitions. [2021-11-13 02:28:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 02:28:24,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:24,139 INFO L514 BasicCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:24,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:28:24,139 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:24,145 INFO L85 PathProgramCache]: Analyzing trace with hash -69475204, now seen corresponding path program 1 times [2021-11-13 02:28:24,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:24,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431024593] [2021-11-13 02:28:24,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:24,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-13 02:28:24,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:24,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431024593] [2021-11-13 02:28:24,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431024593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:24,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:24,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:24,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433743172] [2021-11-13 02:28:24,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:24,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:24,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:24,575 INFO L87 Difference]: Start difference. First operand 340 states and 548 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 02:28:26,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:27,099 INFO L93 Difference]: Finished difference Result 672 states and 1086 transitions. [2021-11-13 02:28:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 123 [2021-11-13 02:28:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:27,120 INFO L225 Difference]: With dead ends: 672 [2021-11-13 02:28:27,121 INFO L226 Difference]: Without dead ends: 637 [2021-11-13 02:28:27,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:27,131 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 328 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2317.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.95ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2400.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:27,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 893 Invalid, 157 Unknown, 0 Unchecked, 20.95ms Time], IncrementalHoareTripleChecker [44 Valid, 112 Invalid, 1 Unknown, 0 Unchecked, 2400.34ms Time] [2021-11-13 02:28:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-13 02:28:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 627. [2021-11-13 02:28:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 352 states have (on average 1.4744318181818181) internal successors, (519), 363 states have internal predecessors, (519), 243 states have call successors, (243), 30 states have call predecessors, (243), 31 states have return successors, (261), 237 states have call predecessors, (261), 243 states have call successors, (261) [2021-11-13 02:28:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1023 transitions. [2021-11-13 02:28:27,279 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1023 transitions. Word has length 123 [2021-11-13 02:28:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:27,282 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1023 transitions. [2021-11-13 02:28:27,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 02:28:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1023 transitions. [2021-11-13 02:28:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 02:28:27,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:27,296 INFO L514 BasicCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:27,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:28:27,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1085692156, now seen corresponding path program 1 times [2021-11-13 02:28:27,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:27,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997882173] [2021-11-13 02:28:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:27,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-13 02:28:27,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:27,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997882173] [2021-11-13 02:28:27,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997882173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:27,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:27,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:27,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161458879] [2021-11-13 02:28:27,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:27,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:27,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:27,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:27,505 INFO L87 Difference]: Start difference. First operand 627 states and 1023 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 02:28:29,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:29,993 INFO L93 Difference]: Finished difference Result 1245 states and 2015 transitions. [2021-11-13 02:28:29,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:29,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 123 [2021-11-13 02:28:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:30,003 INFO L225 Difference]: With dead ends: 1245 [2021-11-13 02:28:30,003 INFO L226 Difference]: Without dead ends: 628 [2021-11-13 02:28:30,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:30,011 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 330 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2338.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.30ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2395.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:30,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 893 Invalid, 152 Unknown, 0 Unchecked, 8.30ms Time], IncrementalHoareTripleChecker [44 Valid, 107 Invalid, 1 Unknown, 0 Unchecked, 2395.02ms Time] [2021-11-13 02:28:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-13 02:28:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 622. [2021-11-13 02:28:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 349 states have (on average 1.4641833810888252) internal successors, (511), 361 states have internal predecessors, (511), 240 states have call successors, (240), 30 states have call predecessors, (240), 32 states have return successors, (254), 234 states have call predecessors, (254), 240 states have call successors, (254) [2021-11-13 02:28:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1005 transitions. [2021-11-13 02:28:30,083 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1005 transitions. Word has length 123 [2021-11-13 02:28:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:30,084 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1005 transitions. [2021-11-13 02:28:30,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 02:28:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1005 transitions. [2021-11-13 02:28:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 02:28:30,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:30,095 INFO L514 BasicCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:30,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:28:30,096 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash 95612746, now seen corresponding path program 1 times [2021-11-13 02:28:30,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:30,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360477240] [2021-11-13 02:28:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:30,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-13 02:28:30,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:30,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360477240] [2021-11-13 02:28:30,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360477240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:30,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:30,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:30,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540905917] [2021-11-13 02:28:30,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:30,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:30,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:30,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:30,251 INFO L87 Difference]: Start difference. First operand 622 states and 1005 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 02:28:32,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:32,869 INFO L93 Difference]: Finished difference Result 971 states and 1540 transitions. [2021-11-13 02:28:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:32,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 123 [2021-11-13 02:28:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:32,877 INFO L225 Difference]: With dead ends: 971 [2021-11-13 02:28:32,877 INFO L226 Difference]: Without dead ends: 536 [2021-11-13 02:28:32,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:32,883 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 378 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 83 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2430.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.05ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2512.01ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:32,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 804 Invalid, 214 Unknown, 0 Unchecked, 8.05ms Time], IncrementalHoareTripleChecker [83 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 2512.01ms Time] [2021-11-13 02:28:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-13 02:28:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 526. [2021-11-13 02:28:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 294 states have (on average 1.435374149659864) internal successors, (422), 303 states have internal predecessors, (422), 200 states have call successors, (200), 30 states have call predecessors, (200), 31 states have return successors, (211), 195 states have call predecessors, (211), 200 states have call successors, (211) [2021-11-13 02:28:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 833 transitions. [2021-11-13 02:28:32,949 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 833 transitions. Word has length 123 [2021-11-13 02:28:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:32,950 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 833 transitions. [2021-11-13 02:28:32,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 02:28:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 833 transitions. [2021-11-13 02:28:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 02:28:32,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:32,959 INFO L514 BasicCegarLoop]: trace histogram [19, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:32,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:28:32,959 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1085315085, now seen corresponding path program 1 times [2021-11-13 02:28:32,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:32,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662856478] [2021-11-13 02:28:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:32,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-13 02:28:35,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:35,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662856478] [2021-11-13 02:28:35,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662856478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:35,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371170028] [2021-11-13 02:28:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:35,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:35,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:35,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:35,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e564419-7fc6-4e59-b089-d4219bffc44a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:28:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-13 02:28:36,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:36,351 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 02:28:36,352 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 238 treesize of output 232