./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-1.c --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_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/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_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/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_55701bf2-d3aa-4eff-977b-905d536a5a9b/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 61e163c7079e2ec105ad677de51f27ac7eccc49ef492909c4fa51ebc02ead9b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:27:38,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:27:38,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:27:38,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:27:38,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:27:38,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:27:38,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:27:38,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:27:38,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:27:38,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:27:38,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:27:38,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:27:38,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:27:38,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:27:38,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:27:38,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:27:38,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:27:38,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:27:38,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:27:38,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:27:38,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:27:38,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:27:38,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:27:38,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:27:38,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:27:38,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:27:38,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:27:38,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:27:38,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:27:38,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:27:38,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:27:38,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:27:38,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:27:38,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:27:38,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:27:38,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:27:38,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:27:38,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:27:38,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:27:38,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:27:38,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:27:38,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:27:38,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:27:38,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:27:38,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:27:38,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:27:38,948 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:27:38,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:27:38,956 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:27:38,956 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:27:38,956 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:27:38,957 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:27:38,958 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:27:38,958 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:27:38,959 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:27:38,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:27:38,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:27:38,959 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:27:38,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:27:38,961 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:27:38,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:27:38,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:27:38,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:27:38,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:27:38,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:27:38,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:27:38,963 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:27:38,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:27:38,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:27:38,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:27:38,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:27:38,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:27:38,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:27:38,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:38,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:27:38,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:27:38,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:27:38,968 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:27:38,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:27:38,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:27:38,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:27:38,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:27:38,969 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_55701bf2-d3aa-4eff-977b-905d536a5a9b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61e163c7079e2ec105ad677de51f27ac7eccc49ef492909c4fa51ebc02ead9b7 [2021-11-13 01:27:39,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:27:39,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:27:39,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:27:39,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:27:39,335 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:27:39,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-regression/test24-1.c [2021-11-13 01:27:39,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/data/aa2d1940d/9a47cb4295f6465796eeb28a80903dc3/FLAGfecb1e0e1 [2021-11-13 01:27:40,061 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:27:40,063 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/sv-benchmarks/c/ldv-regression/test24-1.c [2021-11-13 01:27:40,076 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/data/aa2d1940d/9a47cb4295f6465796eeb28a80903dc3/FLAGfecb1e0e1 [2021-11-13 01:27:40,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/data/aa2d1940d/9a47cb4295f6465796eeb28a80903dc3 [2021-11-13 01:27:40,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:27:40,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:27:40,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:40,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:27:40,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:27:40,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d7f36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40, skipping insertion in model container [2021-11-13 01:27:40,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:27:40,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:27:40,688 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_55701bf2-d3aa-4eff-977b-905d536a5a9b/sv-benchmarks/c/ldv-regression/test24-1.c[704,717] [2021-11-13 01:27:40,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:40,700 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:27:40,721 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_55701bf2-d3aa-4eff-977b-905d536a5a9b/sv-benchmarks/c/ldv-regression/test24-1.c[704,717] [2021-11-13 01:27:40,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:40,738 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:27:40,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40 WrapperNode [2021-11-13 01:27:40,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:40,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:40,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:27:40,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:27:40,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:40,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:27:40,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:27:40,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:27:40,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:27:40,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:27:40,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:27:40,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:27:40,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (1/1) ... [2021-11-13 01:27:40,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:40,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:40,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:27:40,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:27:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:27:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:27:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 01:27:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:27:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:27:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 01:27:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:27:41,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:27:41,184 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 01:27:41,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:27:41 BoogieIcfgContainer [2021-11-13 01:27:41,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:27:41,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:27:41,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:27:41,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:27:41,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:27:40" (1/3) ... [2021-11-13 01:27:41,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2a8983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:27:41, skipping insertion in model container [2021-11-13 01:27:41,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:40" (2/3) ... [2021-11-13 01:27:41,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2a8983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:27:41, skipping insertion in model container [2021-11-13 01:27:41,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:27:41" (3/3) ... [2021-11-13 01:27:41,197 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-1.c [2021-11-13 01:27:41,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:27:41,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:27:41,260 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:27:41,268 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 01:27:41,268 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:27:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2021-11-13 01:27:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 01:27:41,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:41,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 01:27:41,290 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:41,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1980571804, now seen corresponding path program 1 times [2021-11-13 01:27:41,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:41,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222361745] [2021-11-13 01:27:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:41,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:41,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:41,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222361745] [2021-11-13 01:27:41,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222361745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:41,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:41,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 01:27:41,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677921113] [2021-11-13 01:27:41,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:41,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:27:41,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:41,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:27:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:27:41,666 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-13 01:27:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:41,711 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-11-13 01:27:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:27:41,715 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-11-13 01:27:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:41,724 INFO L225 Difference]: With dead ends: 18 [2021-11-13 01:27:41,725 INFO L226 Difference]: Without dead ends: 8 [2021-11-13 01:27:41,729 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 [2021-11-13 01:27:41,736 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.78ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:41,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 3 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 26.78ms Time] [2021-11-13 01:27:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-13 01:27:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-13 01:27:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-11-13 01:27:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-13 01:27:41,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-13 01:27:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:41,777 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-13 01:27:41,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-13 01:27:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-13 01:27:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 01:27:41,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:41,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:41,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:27:41,782 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:41,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1261016426, now seen corresponding path program 1 times [2021-11-13 01:27:41,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:41,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484527267] [2021-11-13 01:27:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:41,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:42,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:42,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484527267] [2021-11-13 01:27:42,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484527267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:42,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:42,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:27:42,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156238569] [2021-11-13 01:27:42,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:42,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:27:42,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:27:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:27:42,040 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-13 01:27:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:42,097 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-11-13 01:27:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:27:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-13 01:27:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:42,099 INFO L225 Difference]: With dead ends: 14 [2021-11-13 01:27:42,099 INFO L226 Difference]: Without dead ends: 10 [2021-11-13 01:27:42,103 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 01:27:42,106 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.88ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.16ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:42,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.88ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 33.16ms Time] [2021-11-13 01:27:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-13 01:27:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-13 01:27:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2021-11-13 01:27:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-13 01:27:42,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-11-13 01:27:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:42,139 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-13 01:27:42,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-13 01:27:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-13 01:27:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 01:27:42,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:42,144 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:42,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 01:27:42,146 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:42,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:42,148 INFO L85 PathProgramCache]: Analyzing trace with hash 688009029, now seen corresponding path program 1 times [2021-11-13 01:27:42,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:42,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280384110] [2021-11-13 01:27:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:42,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:42,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:42,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280384110] [2021-11-13 01:27:42,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280384110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:42,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986697343] [2021-11-13 01:27:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:42,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:42,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:42,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:27:42,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 01:27:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 01:27:42,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:27:42,550 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 56 treesize of output 52 [2021-11-13 01:27:42,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2021-11-13 01:27:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:42,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:27:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:42,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986697343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:27:42,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1117993206] [2021-11-13 01:27:42,863 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-13 01:27:42,863 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:27:42,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:27:42,875 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:27:42,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:27:42,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:42,915 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:27:42,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:42,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-13 01:27:42,919 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:27:42,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:42,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-13 01:27:42,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 160 [2021-11-13 01:27:42,940 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 36=[|v_#valid_18|]} [2021-11-13 01:27:42,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:42,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:42,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:42,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:42,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:42,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:42,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-13 01:27:42,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:42,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:27:42,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:42,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:27:42,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:27:42,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-13 01:27:43,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,117 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:27:43,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:27:43,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:27:43,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-13 01:27:43,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:27:43,155 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:157, output treesize:119 [2021-11-13 01:27:43,182 INFO L180 QuantifierPusher]: treesize reduction 8, result has 95.3 percent of original size [2021-11-13 01:27:43,217 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:27:43,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 01:27:43,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-11-13 01:27:43,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:43,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-13 01:27:43,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-13 01:27:43,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-13 01:27:43,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:27:43,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-11-13 01:27:43,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:27:43,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:190, output treesize:186 [2021-11-13 01:27:43,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 195 [2021-11-13 01:27:43,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:43,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 455 [2021-11-13 01:27:43,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:43,700 INFO L180 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size [2021-11-13 01:27:43,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-13 01:27:43,715 INFO L180 QuantifierPusher]: treesize reduction 37, result has 60.6 percent of original size [2021-11-13 01:27:43,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-13 01:27:43,732 INFO L180 QuantifierPusher]: treesize reduction 8, result has 93.2 percent of original size [2021-11-13 01:27:43,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-13 01:27:43,746 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:27:44,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:27:44,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:27:44,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-13 01:27:44,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612672236] [2021-11-13 01:27:44,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:27:44,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:27:44,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:27:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:27:44,685 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-13 01:27:44,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:44,799 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-13 01:27:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:27:44,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) Word has length 9 [2021-11-13 01:27:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:44,801 INFO L225 Difference]: With dead ends: 20 [2021-11-13 01:27:44,801 INFO L226 Difference]: Without dead ends: 16 [2021-11-13 01:27:44,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:27:44,803 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.07ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:44,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 46.07ms Time] [2021-11-13 01:27:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-13 01:27:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-13 01:27:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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) [2021-11-13 01:27:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-13 01:27:44,809 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2021-11-13 01:27:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:44,809 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-13 01:27:44,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-13 01:27:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-13 01:27:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 01:27:44,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:44,811 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:44,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:27:45,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:45,025 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1824228266, now seen corresponding path program 2 times [2021-11-13 01:27:45,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:45,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501466036] [2021-11-13 01:27:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:45,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:45,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:45,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501466036] [2021-11-13 01:27:45,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501466036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:45,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97154816] [2021-11-13 01:27:45,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:27:45,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:45,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:45,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:27:45,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 01:27:45,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 01:27:45,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:27:45,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:27:45,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:27:45,319 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 27 treesize of output 23 [2021-11-13 01:27:45,941 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-11-13 01:27:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 87 treesize of output 47 [2021-11-13 01:27:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:27:45,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:27:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:27:46,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97154816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:27:46,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1441356966] [2021-11-13 01:27:46,488 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-13 01:27:46,488 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:27:46,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:27:46,489 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:27:46,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:27:46,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,499 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:27:46,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-13 01:27:46,501 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:27:46,501 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-13 01:27:46,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 160 [2021-11-13 01:27:46,512 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 36=[|v_#valid_19|]} [2021-11-13 01:27:46,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-13 01:27:46,535 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:27:46,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,537 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:27:46,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:27:46,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-13 01:27:46,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:27:46,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:27:46,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:27:46,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-13 01:27:46,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:27:46,601 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:157, output treesize:119 [2021-11-13 01:27:46,608 INFO L180 QuantifierPusher]: treesize reduction 8, result has 95.3 percent of original size [2021-11-13 01:27:46,612 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:27:46,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 01:27:46,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-11-13 01:27:46,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:27:46,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-13 01:27:46,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-13 01:27:46,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,647 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-13 01:27:46,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:27:46,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,684 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-11-13 01:27:46,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:27:46,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:190, output treesize:186 [2021-11-13 01:27:46,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 195 [2021-11-13 01:27:46,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,850 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:27:46,863 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 455 [2021-11-13 01:27:46,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:27:46,975 INFO L180 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size [2021-11-13 01:27:46,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-13 01:27:46,987 INFO L180 QuantifierPusher]: treesize reduction 37, result has 60.6 percent of original size [2021-11-13 01:27:46,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-13 01:27:46,997 INFO L180 QuantifierPusher]: treesize reduction 8, result has 93.2 percent of original size [2021-11-13 01:27:47,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-13 01:27:47,003 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:27:47,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:27:47,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:27:47,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-11-13 01:27:47,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668787189] [2021-11-13 01:27:47,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:27:47,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 01:27:47,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:47,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 01:27:47,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-13 01:27:47,978 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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) [2021-11-13 01:27:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:48,842 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-13 01:27:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 01:27:48,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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 [2021-11-13 01:27:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:48,843 INFO L225 Difference]: With dead ends: 20 [2021-11-13 01:27:48,843 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 01:27:48,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 01:27:48,845 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 44.31ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:48,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 13 Unchecked, 44.31ms Time] [2021-11-13 01:27:48,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 01:27:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 01:27:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 01:27:48,847 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-11-13 01:27:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:48,847 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 01:27:48,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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) [2021-11-13 01:27:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 01:27:48,848 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 01:27:48,851 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 01:27:48,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:27:49,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 01:27:49,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-13 01:27:49,133 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-13 01:27:49,133 INFO L858 garLoopResultBuilder]: For program point L31(lines 31 33) no Hoare annotation was computed. [2021-11-13 01:27:49,134 INFO L858 garLoopResultBuilder]: For program point L23(lines 23 34) no Hoare annotation was computed. [2021-11-13 01:27:49,134 INFO L858 garLoopResultBuilder]: For program point L23-2(lines 23 34) no Hoare annotation was computed. [2021-11-13 01:27:49,134 INFO L854 garLoopResultBuilder]: At program point L32(lines 17 40) the Hoare annotation is: false [2021-11-13 01:27:49,134 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-13 01:27:49,134 INFO L858 garLoopResultBuilder]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2021-11-13 01:27:49,135 INFO L854 garLoopResultBuilder]: At program point L28-3(lines 28 30) the Hoare annotation is: (and (= |ULTIMATE.start_main_~pa~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (< |ULTIMATE.start_main_~i~0#1| (+ (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) 1)) (let ((.cse0 (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8))) (= .cse0 (select (select |#memory_int| |ULTIMATE.start_main_~#ad1~0#1.base|) (+ |ULTIMATE.start_main_~#ad1~0#1.offset| (* .cse0 8))))) (= (mod (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| 7) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 0)) [2021-11-13 01:27:49,135 INFO L854 garLoopResultBuilder]: At program point L28-4(lines 28 30) the Hoare annotation is: (= (select (select |#memory_int| |ULTIMATE.start_main_~#ad1~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 8) |ULTIMATE.start_main_~#ad1~0#1.offset|)) |ULTIMATE.start_main_~i~0#1|) [2021-11-13 01:27:49,135 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 38) no Hoare annotation was computed. [2021-11-13 01:27:49,135 INFO L861 garLoopResultBuilder]: At program point L39(lines 16 40) the Hoare annotation is: true [2021-11-13 01:27:49,139 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2021-11-13 01:27:49,141 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 01:27:49,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 01:27:49 BoogieIcfgContainer [2021-11-13 01:27:49,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 01:27:49,168 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 01:27:49,169 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 01:27:49,169 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 01:27:49,169 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:27:41" (3/4) ... [2021-11-13 01:27:49,172 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 01:27:49,186 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-11-13 01:27:49,186 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-13 01:27:49,186 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-13 01:27:49,187 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 01:27:49,235 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-13 01:27:49,235 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 01:27:49,236 INFO L158 Benchmark]: Toolchain (without parser) took 8829.03ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 66.2MB in the beginning and 111.4MB in the end (delta: -45.2MB). Peak memory consumption was 580.3kB. Max. memory is 16.1GB. [2021-11-13 01:27:49,237 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory was 82.7MB in the beginning and 82.7MB in the end (delta: 61.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:27:49,237 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.17ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 78.7MB in the end (delta: -12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 01:27:49,237 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.62ms. Allocated memory is still 102.8MB. Free memory was 78.7MB in the beginning and 77.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:27:49,238 INFO L158 Benchmark]: Boogie Preprocessor took 53.46ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 75.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 01:27:49,238 INFO L158 Benchmark]: RCFGBuilder took 349.88ms. Allocated memory is still 102.8MB. Free memory was 75.9MB in the beginning and 65.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 01:27:49,239 INFO L158 Benchmark]: TraceAbstraction took 7978.95ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 64.8MB in the beginning and 114.5MB in the end (delta: -49.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:27:49,239 INFO L158 Benchmark]: Witness Printer took 66.91ms. Allocated memory is still 148.9MB. Free memory was 114.5MB in the beginning and 111.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 01:27:49,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory was 82.7MB in the beginning and 82.7MB in the end (delta: 61.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.17ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 78.7MB in the end (delta: -12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.62ms. Allocated memory is still 102.8MB. Free memory was 78.7MB in the beginning and 77.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.46ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 75.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 349.88ms. Allocated memory is still 102.8MB. Free memory was 75.9MB in the beginning and 65.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7978.95ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 64.8MB in the beginning and 114.5MB in the end (delta: -49.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 66.91ms. Allocated memory is still 148.9MB. Free memory was 114.5MB in the beginning and 111.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 38]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.9s, OverallIterations: 4, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19 SdHoareTripleChecker+Valid, 150.32ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 31 SdHoareTripleChecker+Invalid, 129.98ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13 IncrementalHoareTripleChecker+Unchecked, 13 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68 IncrementalHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 18 mSDtfsCounter, 68 mSolverCounterSat, 3.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=3, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 11 NumberOfFragments, 58 HoareAnnotationTreeSize, 4 FomulaSimplifications, 16 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 226 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 61 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 77 ConstructedInterpolants, 10 QuantifiedInterpolants, 946 SizeOfPredicates, 29 NumberOfNonLiveVariables, 167 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 25/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((pa == ad1 && i < unknown-#memory_int-unknown[pa][pa] + 1) && (ad1 * -1 + pa) / 8 == unknown-#memory_int-unknown[ad1][ad1 + (ad1 * -1 + pa) / 8 * 8]) && (ad1 * 7 + pa) % 8 == 0 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: unknown-#memory_int-unknown[ad1][i * 8 + ad1] == i - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-13 01:27:49,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55701bf2-d3aa-4eff-977b-905d536a5a9b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE