./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE --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 d5140694c8c74c602573172389066b4fd9e65df8121f12dcdad1dbbd28b45e38 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:08:33,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:08:33,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:08:33,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:08:33,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:08:33,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:08:33,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:08:33,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:08:33,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:08:33,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:08:33,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:08:33,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:08:33,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:08:33,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:08:33,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:08:33,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:08:33,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:08:33,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:08:33,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:08:33,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:08:33,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:08:33,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:08:33,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:08:33,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:08:33,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:08:33,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:08:33,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:08:33,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:08:33,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:08:33,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:08:33,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:08:33,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:08:33,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:08:33,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:08:33,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:08:33,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:08:33,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:08:33,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:08:33,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:08:33,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:08:33,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:08:33,876 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:08:33,917 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:08:33,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:08:33,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:08:33,919 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:08:33,920 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:08:33,920 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:08:33,920 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:08:33,921 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:08:33,921 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:08:33,921 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:08:33,922 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:08:33,922 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:08:33,923 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:08:33,923 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:08:33,923 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:08:33,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:08:33,924 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:08:33,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:08:33,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:08:33,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:08:33,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:08:33,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:08:33,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:08:33,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:08:33,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:08:33,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:08:33,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:08:33,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:08:33,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:08:33,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:08:33,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:08:33,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:08:33,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:08:33,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:08:33,931 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:08:33,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:08:33,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:08:33,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:08:33,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:08:33,933 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_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5140694c8c74c602573172389066b4fd9e65df8121f12dcdad1dbbd28b45e38 [2021-10-24 10:08:34,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:08:34,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:08:34,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:08:34,229 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:08:34,230 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:08:34,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2021-10-24 10:08:34,295 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/data/9372d435e/6f122c0d687a49c790b8a1e38f1c8c62/FLAGd383ef9b0 [2021-10-24 10:08:34,803 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:08:34,804 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2021-10-24 10:08:34,819 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/data/9372d435e/6f122c0d687a49c790b8a1e38f1c8c62/FLAGd383ef9b0 [2021-10-24 10:08:35,155 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/data/9372d435e/6f122c0d687a49c790b8a1e38f1c8c62 [2021-10-24 10:08:35,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:08:35,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:08:35,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:08:35,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:08:35,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:08:35,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff366de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35, skipping insertion in model container [2021-10-24 10:08:35,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:08:35,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:08:35,450 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_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[423,436] [2021-10-24 10:08:35,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:08:35,540 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:08:35,562 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_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[423,436] [2021-10-24 10:08:35,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:08:35,633 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:08:35,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35 WrapperNode [2021-10-24 10:08:35,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:08:35,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:08:35,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:08:35,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:08:35,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:08:35,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:08:35,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:08:35,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:08:35,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:08:35,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:08:35,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:08:35,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:08:35,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (1/1) ... [2021-10-24 10:08:35,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:08:35,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:08:35,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:08:35,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:08:35,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:08:35,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:08:35,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:08:35,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:08:36,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:08:36,489 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-10-24 10:08:36,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:08:36 BoogieIcfgContainer [2021-10-24 10:08:36,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:08:36,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:08:36,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:08:36,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:08:36,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:08:35" (1/3) ... [2021-10-24 10:08:36,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a090695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:08:36, skipping insertion in model container [2021-10-24 10:08:36,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:35" (2/3) ... [2021-10-24 10:08:36,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a090695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:08:36, skipping insertion in model container [2021-10-24 10:08:36,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:08:36" (3/3) ... [2021-10-24 10:08:36,508 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2021-10-24 10:08:36,513 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:08:36,513 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:08:36,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:08:36,565 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 [2021-10-24 10:08:36,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:08:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 54 states have internal predecessors, (94), 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) [2021-10-24 10:08:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 10:08:36,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:08:36,587 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:08:36,588 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:08:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:08:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash -381959243, now seen corresponding path program 1 times [2021-10-24 10:08:36,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:08:36,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916154932] [2021-10-24 10:08:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:36,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:08:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:36,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:08:36,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916154932] [2021-10-24 10:08:36,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916154932] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:08:36,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:08:36,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:08:36,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674811688] [2021-10-24 10:08:36,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:08:36,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:08:36,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:08:36,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:08:36,836 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 54 states have internal predecessors, (94), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-24 10:08:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:08:36,926 INFO L93 Difference]: Finished difference Result 101 states and 170 transitions. [2021-10-24 10:08:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:08:36,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 14 [2021-10-24 10:08:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:08:36,937 INFO L225 Difference]: With dead ends: 101 [2021-10-24 10:08:36,937 INFO L226 Difference]: Without dead ends: 53 [2021-10-24 10:08:36,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:08:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-24 10:08:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-10-24 10:08:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 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) [2021-10-24 10:08:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2021-10-24 10:08:36,977 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 14 [2021-10-24 10:08:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:08:36,978 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2021-10-24 10:08:36,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-24 10:08:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2021-10-24 10:08:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-24 10:08:36,980 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:08:36,980 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:08:36,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:08:36,981 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:08:36,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:08:36,984 INFO L82 PathProgramCache]: Analyzing trace with hash 697101634, now seen corresponding path program 1 times [2021-10-24 10:08:36,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:08:36,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677424857] [2021-10-24 10:08:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:36,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:08:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:37,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:08:37,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677424857] [2021-10-24 10:08:37,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677424857] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:08:37,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:08:37,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:08:37,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120111853] [2021-10-24 10:08:37,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:08:37,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:08:37,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:08:37,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:08:37,089 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-10-24 10:08:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:08:37,146 INFO L93 Difference]: Finished difference Result 99 states and 147 transitions. [2021-10-24 10:08:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:08:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2021-10-24 10:08:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:08:37,152 INFO L225 Difference]: With dead ends: 99 [2021-10-24 10:08:37,152 INFO L226 Difference]: Without dead ends: 59 [2021-10-24 10:08:37,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:08:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-24 10:08:37,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2021-10-24 10:08:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4821428571428572) internal successors, (83), 56 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:08:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2021-10-24 10:08:37,176 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 17 [2021-10-24 10:08:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:08:37,177 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2021-10-24 10:08:37,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-10-24 10:08:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2021-10-24 10:08:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-24 10:08:37,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:08:37,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:08:37,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:08:37,179 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:08:37,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:08:37,179 INFO L82 PathProgramCache]: Analyzing trace with hash -542227389, now seen corresponding path program 1 times [2021-10-24 10:08:37,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:08:37,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553038192] [2021-10-24 10:08:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:37,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:08:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:37,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:08:37,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553038192] [2021-10-24 10:08:37,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553038192] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:08:37,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:08:37,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:08:37,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88656512] [2021-10-24 10:08:37,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:08:37,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:08:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:08:37,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:08:37,311 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:08:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:08:37,393 INFO L93 Difference]: Finished difference Result 105 states and 152 transitions. [2021-10-24 10:08:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:08:37,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-24 10:08:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:08:37,394 INFO L225 Difference]: With dead ends: 105 [2021-10-24 10:08:37,394 INFO L226 Difference]: Without dead ends: 56 [2021-10-24 10:08:37,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:08:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-24 10:08:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-24 10:08:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 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) [2021-10-24 10:08:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2021-10-24 10:08:37,401 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 19 [2021-10-24 10:08:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:08:37,401 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2021-10-24 10:08:37,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:08:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2021-10-24 10:08:37,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-24 10:08:37,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:08:37,403 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:08:37,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:08:37,403 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:08:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:08:37,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1816809049, now seen corresponding path program 1 times [2021-10-24 10:08:37,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:08:37,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803065658] [2021-10-24 10:08:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:37,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:08:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:37,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:08:37,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803065658] [2021-10-24 10:08:37,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803065658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:08:37,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192494981] [2021-10-24 10:08:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:37,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:08:37,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:08:37,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:08:37,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:08:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:37,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:08:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:08:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:37,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:08:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:37,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192494981] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:08:37,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750697828] [2021-10-24 10:08:37,784 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-10-24 10:08:37,784 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:08:37,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:08:37,794 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:08:37,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:08:37,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:37,871 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:37,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:37,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:08:37,875 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:37,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:37,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:08:37,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:08:37,914 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-10-24 10:08:37,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:37,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:37,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:37,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:08:37,941 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:37,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:08:37,943 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:37,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:08:37,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:08:37,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:37,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:37,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:37,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:37,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:37,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:38,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:38,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:38,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:38,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:38,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:08:38,022 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,025 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:08:38,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:08:38,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:08:38,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,043 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:08:38,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:08:38,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:08:38,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:08:38,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,116 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-24 10:08:38,138 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:08:38,157 INFO L185 QuantifierPusher]: treesize reduction 7, result has 95.4 percent of original size 144 [2021-10-24 10:08:38,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,332 INFO L180 QuantifierPusher]: treesize reduction 11, result has 97.1 percent of original size [2021-10-24 10:08:38,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 375 [2021-10-24 10:08:38,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,498 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:08:38,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-24 10:08:38,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:38,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,839 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:38,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,891 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:38,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:08:38,906 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:38,910 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,919 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:08:38,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 374 [2021-10-24 10:08:38,946 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:38,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,959 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:38,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:08:38,964 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:08:38,968 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:08:38,976 INFO L180 QuantifierPusher]: treesize reduction 36, result has 70.5 percent of original size [2021-10-24 10:08:38,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-10-24 10:08:38,987 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:38,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 171 [2021-10-24 10:08:39,011 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:39,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 255 [2021-10-24 10:08:39,028 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:08:41,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1750697828] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:08:41,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:08:41,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 21 [2021-10-24 10:08:41,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793799036] [2021-10-24 10:08:41,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-24 10:08:41,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:08:41,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-24 10:08:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-10-24 10:08:41,688 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:08:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:08:42,489 INFO L93 Difference]: Finished difference Result 132 states and 189 transitions. [2021-10-24 10:08:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-24 10:08:42,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-24 10:08:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:08:42,490 INFO L225 Difference]: With dead ends: 132 [2021-10-24 10:08:42,491 INFO L226 Difference]: Without dead ends: 77 [2021-10-24 10:08:42,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2840.6ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-10-24 10:08:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-24 10:08:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 49. [2021-10-24 10:08:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 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) [2021-10-24 10:08:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2021-10-24 10:08:42,503 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 20 [2021-10-24 10:08:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:08:42,504 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2021-10-24 10:08:42,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:08:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2021-10-24 10:08:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:08:42,507 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:08:42,508 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:08:42,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:08:42,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-24 10:08:42,708 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:08:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:08:42,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1656193896, now seen corresponding path program 1 times [2021-10-24 10:08:42,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:08:42,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019115791] [2021-10-24 10:08:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:42,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:08:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:42,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:08:42,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019115791] [2021-10-24 10:08:42,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019115791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:08:42,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022488575] [2021-10-24 10:08:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:42,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:08:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:08:42,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:08:42,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:08:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 10:08:42,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:08:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:08:43,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:08:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:08:43,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022488575] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:08:43,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:08:43,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5] total 15 [2021-10-24 10:08:43,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774252380] [2021-10-24 10:08:43,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-24 10:08:43,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:08:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-24 10:08:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:08:43,223 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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) [2021-10-24 10:08:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:08:43,400 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2021-10-24 10:08:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 10:08:43,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 22 [2021-10-24 10:08:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:08:43,401 INFO L225 Difference]: With dead ends: 71 [2021-10-24 10:08:43,401 INFO L226 Difference]: Without dead ends: 63 [2021-10-24 10:08:43,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-10-24 10:08:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-24 10:08:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2021-10-24 10:08:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:08:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2021-10-24 10:08:43,408 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 22 [2021-10-24 10:08:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:08:43,408 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2021-10-24 10:08:43,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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) [2021-10-24 10:08:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2021-10-24 10:08:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-24 10:08:43,416 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:08:43,416 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:08:43,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:08:43,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-24 10:08:43,629 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:08:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:08:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash -204531082, now seen corresponding path program 1 times [2021-10-24 10:08:43,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:08:43,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836367187] [2021-10-24 10:08:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:43,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:08:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:43,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:08:43,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836367187] [2021-10-24 10:08:43,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836367187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:08:43,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158534932] [2021-10-24 10:08:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:43,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:08:43,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:08:43,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:08:43,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-24 10:08:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:43,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:08:43,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:08:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:08:43,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:08:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:08:44,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158534932] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:08:44,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:08:44,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5] total 11 [2021-10-24 10:08:44,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058733257] [2021-10-24 10:08:44,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:08:44,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:08:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:08:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:08:44,123 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-10-24 10:08:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:08:44,262 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2021-10-24 10:08:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 10:08:44,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 23 [2021-10-24 10:08:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:08:44,263 INFO L225 Difference]: With dead ends: 76 [2021-10-24 10:08:44,263 INFO L226 Difference]: Without dead ends: 47 [2021-10-24 10:08:44,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:08:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-24 10:08:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-10-24 10:08:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 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) [2021-10-24 10:08:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-10-24 10:08:44,271 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2021-10-24 10:08:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:08:44,271 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-10-24 10:08:44,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-10-24 10:08:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-10-24 10:08:44,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 10:08:44,273 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:08:44,273 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:08:44,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:08:44,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:08:44,493 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:08:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:08:44,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1266183059, now seen corresponding path program 1 times [2021-10-24 10:08:44,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:08:44,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164346551] [2021-10-24 10:08:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:44,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:08:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:44,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:08:44,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164346551] [2021-10-24 10:08:44,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164346551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:08:44,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925837815] [2021-10-24 10:08:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:44,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:08:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:08:44,541 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:08:44,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-24 10:08:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:44,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:08:44,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:08:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:44,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:08:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:44,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925837815] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:08:44,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011297279] [2021-10-24 10:08:44,828 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-10-24 10:08:44,828 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:08:44,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:08:44,829 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:08:44,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:08:44,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,856 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:44,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:08:44,858 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:44,858 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:08:44,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:08:44,867 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-10-24 10:08:44,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:08:44,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:08:44,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:08:44,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:08:44,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:44,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:44,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:08:44,920 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:08:44,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,923 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:08:44,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:08:44,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:44,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:08:44,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:08:44,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:08:44,941 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:08:44,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:44,983 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-24 10:08:44,990 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:08:44,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-24 10:08:44,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,075 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.4 percent of original size [2021-10-24 10:08:45,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-10-24 10:08:45,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,181 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:08:45,184 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-24 10:08:45,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:45,420 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:45,422 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:45,426 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:45,446 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:45,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:45,451 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:08:45,455 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:45,457 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:45,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:08:45,470 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 374 [2021-10-24 10:08:45,477 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:45,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:45,483 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:45,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:45,485 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:08:45,487 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:08:45,490 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:08:45,501 INFO L180 QuantifierPusher]: treesize reduction 44, result has 63.3 percent of original size [2021-10-24 10:08:45,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-24 10:08:45,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:45,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-24 10:08:45,519 INFO L180 QuantifierPusher]: treesize reduction 8, result has 91.5 percent of original size [2021-10-24 10:08:45,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-24 10:08:45,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:45,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-10-24 10:08:45,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:45,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 340 [2021-10-24 10:08:45,638 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:08:52,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2011297279] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:08:52,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:08:52,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2021-10-24 10:08:52,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466451695] [2021-10-24 10:08:52,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-24 10:08:52,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:08:52,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-24 10:08:52,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-10-24 10:08:52,842 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-10-24 10:08:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:08:54,310 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2021-10-24 10:08:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-24 10:08:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 29 [2021-10-24 10:08:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:08:54,312 INFO L225 Difference]: With dead ends: 98 [2021-10-24 10:08:54,312 INFO L226 Difference]: Without dead ends: 90 [2021-10-24 10:08:54,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 7392.0ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-10-24 10:08:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-24 10:08:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-10-24 10:08:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 62 states have internal predecessors, (80), 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) [2021-10-24 10:08:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2021-10-24 10:08:54,322 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 29 [2021-10-24 10:08:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:08:54,323 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2021-10-24 10:08:54,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-10-24 10:08:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2021-10-24 10:08:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 10:08:54,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:08:54,324 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:08:54,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-24 10:08:54,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:08:54,540 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:08:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:08:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 481798449, now seen corresponding path program 1 times [2021-10-24 10:08:54,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:08:54,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757012849] [2021-10-24 10:08:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:54,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:08:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:54,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:08:54,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757012849] [2021-10-24 10:08:54,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757012849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:08:54,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692612347] [2021-10-24 10:08:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:08:54,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:08:54,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:08:54,573 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:08:54,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-24 10:08:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:08:54,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:08:54,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:08:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:54,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:08:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:08:54,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692612347] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:08:54,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840819809] [2021-10-24 10:08:54,852 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-10-24 10:08:54,852 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:08:54,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:08:54,853 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:08:54,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:08:54,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,871 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:54,871 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:08:54,872 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:54,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,873 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:08:54,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:08:54,879 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-10-24 10:08:54,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:08:54,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:08:54,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:08:54,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:08:54,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:54,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:08:54,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:08:54,921 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:08:54,928 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:08:54,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:08:54,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:54,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:08:54,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:08:54,937 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:08:54,945 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:08:54,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:54,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-24 10:08:54,972 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:08:54,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-24 10:08:54,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:54,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:55,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 391 [2021-10-24 10:08:55,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,104 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:08:55,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-24 10:08:55,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:08:55,297 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:55,299 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:55,302 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:55,317 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:55,318 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:55,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:08:55,323 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:55,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:55,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:08:55,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 374 [2021-10-24 10:08:55,340 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:55,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:55,345 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:08:55,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:55,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:08:55,349 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:08:55,351 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:08:55,362 INFO L180 QuantifierPusher]: treesize reduction 44, result has 63.3 percent of original size [2021-10-24 10:08:55,364 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-24 10:08:55,367 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:55,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-24 10:08:55,382 INFO L180 QuantifierPusher]: treesize reduction 10, result has 94.9 percent of original size [2021-10-24 10:08:55,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 178 [2021-10-24 10:08:55,410 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:08:55,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 343 [2021-10-24 10:08:55,422 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:09:00,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1840819809] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:09:00,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:09:00,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2021-10-24 10:09:00,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144328823] [2021-10-24 10:09:00,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-24 10:09:00,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:09:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-24 10:09:00,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-10-24 10:09:00,259 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-10-24 10:09:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:09:01,155 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2021-10-24 10:09:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-24 10:09:01,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 29 [2021-10-24 10:09:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:09:01,157 INFO L225 Difference]: With dead ends: 91 [2021-10-24 10:09:01,157 INFO L226 Difference]: Without dead ends: 83 [2021-10-24 10:09:01,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 4981.9ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-10-24 10:09:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-24 10:09:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-10-24 10:09:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 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) [2021-10-24 10:09:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2021-10-24 10:09:01,167 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 29 [2021-10-24 10:09:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:09:01,167 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2021-10-24 10:09:01,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-10-24 10:09:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2021-10-24 10:09:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 10:09:01,168 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:09:01,168 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:09:01,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-24 10:09:01,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-24 10:09:01,377 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:09:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:09:01,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1247934927, now seen corresponding path program 1 times [2021-10-24 10:09:01,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:09:01,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92610271] [2021-10-24 10:09:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:01,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:09:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:01,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:09:01,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92610271] [2021-10-24 10:09:01,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92610271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:09:01,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101612505] [2021-10-24 10:09:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:01,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:09:01,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:09:01,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:09:01,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-24 10:09:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:01,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:09:01,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:09:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:01,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:09:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:01,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101612505] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:09:01,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134420379] [2021-10-24 10:09:01,759 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-10-24 10:09:01,760 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:09:01,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:09:01,760 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:09:01,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:09:01,787 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,788 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:01,788 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,789 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:01,789 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:01,790 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:09:01,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:09:01,795 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-10-24 10:09:01,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:09:01,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:01,808 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:01,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:01,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:01,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:01,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:09:01,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:01,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:01,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:01,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:01,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,846 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:09:01,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:09:01,848 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:09:01,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,862 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:01,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:01,881 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-24 10:09:01,886 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:09:01,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-24 10:09:01,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:01,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:01,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:01,950 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.4 percent of original size [2021-10-24 10:09:01,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-10-24 10:09:01,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,033 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:09:02,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-24 10:09:02,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:02,202 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:02,206 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:02,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:02,225 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:02,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:02,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:02,237 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:02,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:02,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:09:02,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 374 [2021-10-24 10:09:02,255 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:02,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:02,260 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:02,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:02,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:02,264 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:09:02,267 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:09:02,279 INFO L180 QuantifierPusher]: treesize reduction 48, result has 65.0 percent of original size [2021-10-24 10:09:02,283 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-10-24 10:09:02,292 INFO L180 QuantifierPusher]: treesize reduction 13, result has 86.3 percent of original size [2021-10-24 10:09:02,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-24 10:09:02,302 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:02,305 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 171 [2021-10-24 10:09:02,330 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:02,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-10-24 10:09:02,350 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:09:05,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [134420379] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:09:05,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:09:05,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2021-10-24 10:09:05,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816556038] [2021-10-24 10:09:05,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-24 10:09:05,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:09:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-24 10:09:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-10-24 10:09:05,885 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-10-24 10:09:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:09:06,854 INFO L93 Difference]: Finished difference Result 107 states and 135 transitions. [2021-10-24 10:09:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-24 10:09:06,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 29 [2021-10-24 10:09:06,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:09:06,855 INFO L225 Difference]: With dead ends: 107 [2021-10-24 10:09:06,855 INFO L226 Difference]: Without dead ends: 88 [2021-10-24 10:09:06,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 3686.6ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-10-24 10:09:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-24 10:09:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-10-24 10:09:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 69 states have internal predecessors, (90), 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) [2021-10-24 10:09:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2021-10-24 10:09:06,866 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 29 [2021-10-24 10:09:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:09:06,866 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2021-10-24 10:09:06,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-10-24 10:09:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2021-10-24 10:09:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 10:09:06,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:09:06,868 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:09:06,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-24 10:09:07,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-10-24 10:09:07,093 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:09:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:09:07,093 INFO L82 PathProgramCache]: Analyzing trace with hash 500046581, now seen corresponding path program 1 times [2021-10-24 10:09:07,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:09:07,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790865569] [2021-10-24 10:09:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:07,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:09:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:07,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:09:07,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790865569] [2021-10-24 10:09:07,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790865569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:09:07,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881880555] [2021-10-24 10:09:07,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:07,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:09:07,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:09:07,120 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:09:07,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-24 10:09:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:07,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:09:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:09:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:07,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:09:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:07,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881880555] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:09:07,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801518105] [2021-10-24 10:09:07,495 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-10-24 10:09:07,496 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:09:07,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:09:07,496 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:09:07,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:09:07,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,522 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:07,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,523 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:07,524 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:07,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:09:07,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:09:07,532 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-10-24 10:09:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:09:07,545 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:07,546 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:07,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:07,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:07,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:09:07,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:07,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:07,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:07,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,587 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:09:07,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:09:07,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:09:07,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:07,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,622 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-24 10:09:07,629 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:09:07,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-24 10:09:07,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,693 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.4 percent of original size [2021-10-24 10:09:07,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-10-24 10:09:07,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,768 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:09:07,770 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-24 10:09:07,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:07,922 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,924 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:07,928 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,947 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:07,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:07,957 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:07,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:09:07,985 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-24 10:09:07,992 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:07,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,996 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:07,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:07,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:08,000 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:09:08,002 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:09:08,014 INFO L180 QuantifierPusher]: treesize reduction 48, result has 65.0 percent of original size [2021-10-24 10:09:08,017 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-10-24 10:09:08,030 INFO L180 QuantifierPusher]: treesize reduction 15, result has 92.3 percent of original size [2021-10-24 10:09:08,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-10-24 10:09:08,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:08,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-10-24 10:09:08,064 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:09:11,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1801518105] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:09:11,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:09:11,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2021-10-24 10:09:11,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577112378] [2021-10-24 10:09:11,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-24 10:09:11,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:09:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-24 10:09:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-10-24 10:09:11,381 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-10-24 10:09:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:09:12,003 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2021-10-24 10:09:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-24 10:09:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 29 [2021-10-24 10:09:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:09:12,004 INFO L225 Difference]: With dead ends: 90 [2021-10-24 10:09:12,004 INFO L226 Difference]: Without dead ends: 75 [2021-10-24 10:09:12,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 3489.5ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-10-24 10:09:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-24 10:09:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-10-24 10:09:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3) internal successors, (91), 70 states have internal predecessors, (91), 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) [2021-10-24 10:09:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-10-24 10:09:12,015 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 29 [2021-10-24 10:09:12,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:09:12,015 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-10-24 10:09:12,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-10-24 10:09:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-10-24 10:09:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 10:09:12,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:09:12,017 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:09:12,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-24 10:09:12,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-10-24 10:09:12,233 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:09:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:09:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1153373444, now seen corresponding path program 1 times [2021-10-24 10:09:12,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:09:12,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220488353] [2021-10-24 10:09:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:12,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:09:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:12,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:09:12,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220488353] [2021-10-24 10:09:12,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220488353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:09:12,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828269096] [2021-10-24 10:09:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:12,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:09:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:09:12,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:09:12,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-24 10:09:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:12,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:09:12,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:09:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:12,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:09:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:12,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828269096] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:09:12,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420505922] [2021-10-24 10:09:12,648 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-10-24 10:09:12,648 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:09:12,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:09:12,649 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:09:12,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:09:12,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,661 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:12,662 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:09:12,663 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:12,663 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,664 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:12,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:09:12,668 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-10-24 10:09:12,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:09:12,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:12,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:12,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:12,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:12,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:09:12,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:12,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,712 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:12,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:12,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,717 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:09:12,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:09:12,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:09:12,727 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:12,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:12,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-24 10:09:12,744 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:09:12,747 INFO L185 QuantifierPusher]: treesize reduction 7, result has 95.4 percent of original size 144 [2021-10-24 10:09:12,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,809 INFO L180 QuantifierPusher]: treesize reduction 5, result has 98.7 percent of original size [2021-10-24 10:09:12,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 381 [2021-10-24 10:09:12,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,876 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:09:12,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-24 10:09:12,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:12,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:13,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,009 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:13,014 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,029 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:13,031 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:13,038 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:13,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,054 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:09:13,061 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-24 10:09:13,067 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:13,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,071 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:13,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:13,075 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:09:13,077 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:09:13,086 INFO L180 QuantifierPusher]: treesize reduction 44, result has 63.3 percent of original size [2021-10-24 10:09:13,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-24 10:09:13,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,093 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-24 10:09:13,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-24 10:09:13,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 10:09:13,117 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-10-24 10:09:13,170 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:13,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 357 [2021-10-24 10:09:13,184 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:09:24,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1420505922] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:09:24,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:09:24,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 28 [2021-10-24 10:09:24,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704672176] [2021-10-24 10:09:24,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-24 10:09:24,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:09:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-24 10:09:24,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-10-24 10:09:24,034 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-10-24 10:09:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:09:26,139 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2021-10-24 10:09:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-24 10:09:26,140 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-24 10:09:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:09:26,141 INFO L225 Difference]: With dead ends: 113 [2021-10-24 10:09:26,141 INFO L226 Difference]: Without dead ends: 105 [2021-10-24 10:09:26,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 11004.4ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-10-24 10:09:26,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-24 10:09:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2021-10-24 10:09:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 73 states have internal predecessors, (95), 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) [2021-10-24 10:09:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-10-24 10:09:26,151 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 30 [2021-10-24 10:09:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:09:26,151 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-10-24 10:09:26,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-10-24 10:09:26,152 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-10-24 10:09:26,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 10:09:26,153 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:09:26,153 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:09:26,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-24 10:09:26,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:09:26,361 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:09:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:09:26,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1719065536, now seen corresponding path program 1 times [2021-10-24 10:09:26,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:09:26,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860659954] [2021-10-24 10:09:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:26,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:09:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:26,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:09:26,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860659954] [2021-10-24 10:09:26,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860659954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:09:26,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367108992] [2021-10-24 10:09:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:26,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:09:26,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:09:26,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:09:26,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-24 10:09:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:26,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:09:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:09:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:26,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:09:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:26,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367108992] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:09:26,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197506030] [2021-10-24 10:09:26,711 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-10-24 10:09:26,711 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:09:26,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:09:26,711 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:09:26,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:09:26,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,725 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:26,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:26,726 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:26,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:09:26,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:09:26,730 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-10-24 10:09:26,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:09:26,745 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,745 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:26,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:26,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:26,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:09:26,770 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:26,772 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:26,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:26,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,776 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:09:26,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:09:26,777 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:09:26,783 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:26,800 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-24 10:09:26,807 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:09:26,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-24 10:09:26,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:26,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 386 [2021-10-24 10:09:26,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,945 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:09:26,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-24 10:09:26,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:26,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:27,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:27,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:27,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:27,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:27,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:27,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:27,082 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:27,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:27,094 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:27,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:27,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:27,102 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:27,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:27,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:09:27,120 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-24 10:09:27,127 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:27,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:27,132 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:27,133 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:27,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:27,137 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:09:27,140 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:09:27,153 INFO L180 QuantifierPusher]: treesize reduction 48, result has 65.0 percent of original size [2021-10-24 10:09:27,156 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-10-24 10:09:27,164 INFO L180 QuantifierPusher]: treesize reduction 6, result has 94.1 percent of original size [2021-10-24 10:09:27,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-24 10:09:27,171 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:27,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-24 10:09:27,178 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:27,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-10-24 10:09:27,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:27,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 352 [2021-10-24 10:09:27,217 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:09:32,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [197506030] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:09:32,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:09:32,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 28 [2021-10-24 10:09:32,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115403884] [2021-10-24 10:09:32,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-24 10:09:32,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:09:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-24 10:09:32,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-10-24 10:09:32,996 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-10-24 10:09:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:09:34,164 INFO L93 Difference]: Finished difference Result 100 states and 125 transitions. [2021-10-24 10:09:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-24 10:09:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-24 10:09:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:09:34,166 INFO L225 Difference]: With dead ends: 100 [2021-10-24 10:09:34,166 INFO L226 Difference]: Without dead ends: 81 [2021-10-24 10:09:34,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 5930.1ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-10-24 10:09:34,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-24 10:09:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-10-24 10:09:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 76 states have internal predecessors, (98), 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) [2021-10-24 10:09:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2021-10-24 10:09:34,178 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 30 [2021-10-24 10:09:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:09:34,178 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2021-10-24 10:09:34,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-10-24 10:09:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2021-10-24 10:09:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 10:09:34,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:09:34,180 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:09:34,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-24 10:09:34,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-10-24 10:09:34,405 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:09:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:09:34,406 INFO L82 PathProgramCache]: Analyzing trace with hash -284157171, now seen corresponding path program 1 times [2021-10-24 10:09:34,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:09:34,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765350733] [2021-10-24 10:09:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:34,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:09:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:34,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:09:34,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765350733] [2021-10-24 10:09:34,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765350733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:09:34,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27885622] [2021-10-24 10:09:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:34,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:09:34,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:09:34,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:09:34,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-24 10:09:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:34,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:09:34,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:09:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:34,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:09:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:34,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27885622] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:09:34,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [285369178] [2021-10-24 10:09:34,823 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-10-24 10:09:34,824 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:09:34,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:09:34,824 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:09:34,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:09:34,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,840 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:34,841 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:34,841 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:34,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:09:34,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:09:34,846 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-10-24 10:09:34,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:09:34,858 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:34,859 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:34,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:34,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:34,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:09:34,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:34,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:34,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:34,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:34,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:09:34,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:09:34,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:09:34,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:34,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:34,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-24 10:09:34,922 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:09:34,926 INFO L185 QuantifierPusher]: treesize reduction 7, result has 95.4 percent of original size 144 [2021-10-24 10:09:34,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:34,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:34,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:34,981 INFO L180 QuantifierPusher]: treesize reduction 5, result has 98.7 percent of original size [2021-10-24 10:09:34,991 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 381 [2021-10-24 10:09:35,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,052 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:09:35,054 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-24 10:09:35,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:35,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,186 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:35,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,201 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:35,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:35,206 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:35,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:09:35,216 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-24 10:09:35,220 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:35,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,223 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:35,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:35,226 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:09:35,227 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:09:35,233 INFO L180 QuantifierPusher]: treesize reduction 37, result has 70.6 percent of original size [2021-10-24 10:09:35,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-24 10:09:35,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-24 10:09:35,249 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,252 INFO L185 QuantifierPusher]: treesize reduction 6, result has 93.0 percent of original size 80 [2021-10-24 10:09:35,262 INFO L180 QuantifierPusher]: treesize reduction 14, result has 87.0 percent of original size [2021-10-24 10:09:35,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-24 10:09:35,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,273 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-10-24 10:09:35,313 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:35,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-10-24 10:09:35,325 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:09:48,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [285369178] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:09:48,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:09:48,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 28 [2021-10-24 10:09:48,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868709922] [2021-10-24 10:09:48,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-24 10:09:48,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:09:48,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-24 10:09:48,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-10-24 10:09:48,602 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-10-24 10:09:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:09:50,562 INFO L93 Difference]: Finished difference Result 126 states and 156 transitions. [2021-10-24 10:09:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-24 10:09:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-24 10:09:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:09:50,564 INFO L225 Difference]: With dead ends: 126 [2021-10-24 10:09:50,564 INFO L226 Difference]: Without dead ends: 118 [2021-10-24 10:09:50,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 13432.0ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-10-24 10:09:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-24 10:09:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 86. [2021-10-24 10:09:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 85 states have internal predecessors, (110), 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) [2021-10-24 10:09:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2021-10-24 10:09:50,575 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 30 [2021-10-24 10:09:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:09:50,576 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2021-10-24 10:09:50,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-10-24 10:09:50,576 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2021-10-24 10:09:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 10:09:50,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:09:50,577 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:09:50,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-24 10:09:50,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:09:50,797 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:09:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:09:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1463824337, now seen corresponding path program 1 times [2021-10-24 10:09:50,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:09:50,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187571843] [2021-10-24 10:09:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:50,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:09:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:50,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:09:50,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187571843] [2021-10-24 10:09:50,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187571843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:09:50,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310041472] [2021-10-24 10:09:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:50,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:09:50,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:09:50,828 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:09:50,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-24 10:09:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:09:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:09:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:51,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:09:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:51,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310041472] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:09:51,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127162532] [2021-10-24 10:09:51,160 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-10-24 10:09:51,161 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:09:51,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:09:51,161 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:09:51,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:09:51,186 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,187 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:51,189 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:51,189 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:51,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:09:51,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:09:51,194 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-10-24 10:09:51,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:09:51,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:51,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,210 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:51,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:51,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:51,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:09:51,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:51,237 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:51,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:51,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,243 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:09:51,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:09:51,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:09:51,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:51,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-24 10:09:51,273 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:09:51,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-24 10:09:51,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 386 [2021-10-24 10:09:51,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,374 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:09:51,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-24 10:09:51,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:51,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,497 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:51,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,518 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:51,520 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:51,526 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:51,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:09:51,542 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-24 10:09:51,549 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:51,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,554 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:51,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:51,559 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:09:51,561 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:09:51,569 INFO L180 QuantifierPusher]: treesize reduction 37, result has 70.6 percent of original size [2021-10-24 10:09:51,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-24 10:09:51,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-24 10:09:51,581 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,584 INFO L185 QuantifierPusher]: treesize reduction 6, result has 93.0 percent of original size 80 [2021-10-24 10:09:51,605 INFO L180 QuantifierPusher]: treesize reduction 16, result has 92.3 percent of original size [2021-10-24 10:09:51,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-10-24 10:09:51,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:51,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 351 [2021-10-24 10:09:51,660 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:09:57,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [127162532] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:09:57,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:09:57,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 28 [2021-10-24 10:09:57,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769126209] [2021-10-24 10:09:57,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-24 10:09:57,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:09:57,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-24 10:09:57,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-10-24 10:09:57,946 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-10-24 10:09:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:09:59,191 INFO L93 Difference]: Finished difference Result 113 states and 140 transitions. [2021-10-24 10:09:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-24 10:09:59,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-24 10:09:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:09:59,193 INFO L225 Difference]: With dead ends: 113 [2021-10-24 10:09:59,193 INFO L226 Difference]: Without dead ends: 105 [2021-10-24 10:09:59,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 6444.3ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-10-24 10:09:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-24 10:09:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2021-10-24 10:09:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 83 states have internal predecessors, (107), 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) [2021-10-24 10:09:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-10-24 10:09:59,200 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 30 [2021-10-24 10:09:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:09:59,200 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-10-24 10:09:59,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-10-24 10:09:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-10-24 10:09:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-24 10:09:59,201 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:09:59,202 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:09:59,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-24 10:09:59,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-10-24 10:09:59,417 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:09:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:09:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1531404900, now seen corresponding path program 1 times [2021-10-24 10:09:59,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:09:59,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948930744] [2021-10-24 10:09:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:59,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:09:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:59,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:09:59,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948930744] [2021-10-24 10:09:59,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948930744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:09:59,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72555959] [2021-10-24 10:09:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:09:59,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:09:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:09:59,443 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:09:59,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-24 10:09:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:09:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:09:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:09:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:59,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:09:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:09:59,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72555959] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:09:59,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88511376] [2021-10-24 10:09:59,812 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-10-24 10:09:59,812 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:09:59,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:09:59,813 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:09:59,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:09:59,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,823 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:59,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:09:59,824 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:09:59,824 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:09:59,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-24 10:09:59,828 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_19|]} [2021-10-24 10:09:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:09:59,841 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:59,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:09:59,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:59,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:59,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:09:59,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-24 10:09:59,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:59,868 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:09:59,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:09:59,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:59,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-24 10:09:59,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:09:59,875 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-24 10:09:59,882 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:09:59,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:09:59,901 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-24 10:09:59,905 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-24 10:09:59,914 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-24 10:09:59,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:59,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:59,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:09:59,966 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.4 percent of original size [2021-10-24 10:09:59,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-10-24 10:09:59,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,024 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-24 10:10:00,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-24 10:10:00,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:00,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,132 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:10:00,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,145 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:10:00,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,150 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-24 10:10:00,152 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:10:00,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-24 10:10:00,168 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-24 10:10:00,173 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:10:00,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,177 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:10:00,178 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,180 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 10:10:00,181 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-24 10:10:00,183 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-24 10:10:00,192 INFO L180 QuantifierPusher]: treesize reduction 37, result has 70.6 percent of original size [2021-10-24 10:10:00,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-24 10:10:00,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-24 10:10:00,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,211 INFO L185 QuantifierPusher]: treesize reduction 6, result has 93.0 percent of original size 80 [2021-10-24 10:10:00,223 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.9 percent of original size [2021-10-24 10:10:00,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-10-24 10:10:00,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-10-24 10:10:00,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 199 [2021-10-24 10:10:00,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:10:00,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 364 [2021-10-24 10:10:00,537 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:10:19,230 WARN L207 SmtUtils]: Spent 5.76 s on a formula simplification. DAG size of input: 140 DAG size of output: 120 [2021-10-24 10:10:19,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [88511376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:10:19,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:10:19,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [4, 4, 4] total 29 [2021-10-24 10:10:19,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640643332] [2021-10-24 10:10:19,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-24 10:10:19,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:10:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-24 10:10:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-10-24 10:10:19,233 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:10:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:10:21,880 INFO L93 Difference]: Finished difference Result 130 states and 158 transitions. [2021-10-24 10:10:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-24 10:10:21,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-24 10:10:21,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:10:21,881 INFO L225 Difference]: With dead ends: 130 [2021-10-24 10:10:21,881 INFO L226 Difference]: Without dead ends: 122 [2021-10-24 10:10:21,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 18853.7ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-10-24 10:10:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-24 10:10:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 80. [2021-10-24 10:10:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 79 states have internal predecessors, (102), 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) [2021-10-24 10:10:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2021-10-24 10:10:21,890 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 31 [2021-10-24 10:10:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:10:21,890 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2021-10-24 10:10:21,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:10:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2021-10-24 10:10:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-24 10:10:21,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:10:21,891 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:10:21,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-24 10:10:22,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:10:22,093 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:10:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:10:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1465854924, now seen corresponding path program 1 times [2021-10-24 10:10:22,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:10:22,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76736575] [2021-10-24 10:10:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:10:22,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:10:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:10:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:10:22,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:10:22,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76736575] [2021-10-24 10:10:22,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76736575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:10:22,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336879857] [2021-10-24 10:10:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:10:22,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:10:22,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:10:22,164 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:10:22,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-24 10:10:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:10:22,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-24 10:10:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:10:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:10:22,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:10:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:10:23,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336879857] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:10:23,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:10:23,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 8] imperfect sequences [5] total 16 [2021-10-24 10:10:23,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222248758] [2021-10-24 10:10:23,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-24 10:10:23,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:10:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-24 10:10:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:10:23,381 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 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) [2021-10-24 10:10:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:10:23,565 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2021-10-24 10:10:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:10:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 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 31 [2021-10-24 10:10:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:10:23,566 INFO L225 Difference]: With dead ends: 80 [2021-10-24 10:10:23,566 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:10:23,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-10-24 10:10:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:10:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:10:23,568 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) [2021-10-24 10:10:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:10:23,568 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-10-24 10:10:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:10:23,568 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:10:23,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 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) [2021-10-24 10:10:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:10:23,573 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:10:23,575 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:10:23,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-24 10:10:23,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-10-24 10:10:23,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 10:10:23,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:23,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:23,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:23,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:23,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:24,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:10:25,521 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 10:10:25,521 INFO L857 garLoopResultBuilder]: For program point L186(lines 186 203) no Hoare annotation was computed. [2021-10-24 10:10:25,521 INFO L857 garLoopResultBuilder]: For program point L186-2(lines 186 203) no Hoare annotation was computed. [2021-10-24 10:10:25,521 INFO L857 garLoopResultBuilder]: For program point L21(lines 21 26) no Hoare annotation was computed. [2021-10-24 10:10:25,521 INFO L857 garLoopResultBuilder]: For program point L21-1(lines 21 26) no Hoare annotation was computed. [2021-10-24 10:10:25,521 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 26) no Hoare annotation was computed. [2021-10-24 10:10:25,521 INFO L857 garLoopResultBuilder]: For program point L21-3(lines 21 26) no Hoare annotation was computed. [2021-10-24 10:10:25,522 INFO L853 garLoopResultBuilder]: At program point L71(lines 20 73) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |#t~string4.base|))) (and (< |#StackHeapBarrier| |#t~string6.base|) (<= ULTIMATE.start_main_~ea~2 127) (< |#StackHeapBarrier| |#t~string5.base|) (<= 0 (+ ULTIMATE.start_main_~ea~2 128)) (= (select |#valid| |#t~string5.base|) 1) (= (select |#valid| |#t~string4.base|) 1) (= |#t~string5.offset| 0) (<= ULTIMATE.start_main_~eb~2 127) (= |ULTIMATE.start_base2flt_#in~m| 0) (= ULTIMATE.start_base2flt_~__retres4~0 0) (<= 0 (+ ULTIMATE.start_main_~eb~2 128)) (= (select |#valid| |#t~string6.base|) 1) (= |ULTIMATE.start_base2flt_#in~m| ULTIMATE.start_base2flt_~m) (= (select |#valid| 0) 0) (< |#StackHeapBarrier| |#t~string4.base|) (= (select |#length| |#t~string6.base|) 12) (= (select .cse0 (+ 1 |#t~string4.offset|)) 0) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (= |ULTIMATE.start_base2flt_#in~e| 0) (= |ULTIMATE.start_base2flt_#in~e| ULTIMATE.start_base2flt_~e) (= (select |#length| |#t~string4.base|) 2) (= (select .cse0 |#t~string4.offset|) 48) (= 22 (select |#length| |#t~string5.base|)) (= 0 |#t~string4.offset|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-10-24 10:10:25,522 INFO L853 garLoopResultBuilder]: At program point L71-1(lines 20 73) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= (+ ULTIMATE.start_base2flt_~e 1) 0) (= ULTIMATE.start_main_~zero~0 0) (<= ULTIMATE.start_main_~ea~2 127) (<= 0 (+ ULTIMATE.start_main_~ea~2 128)) (<= 0 |#t~string5.base|) (<= ULTIMATE.start_main_~eb~2 127) (<= 0 |#t~string5.offset|) (<= 0 (+ ULTIMATE.start_main_~eb~2 128)) (<= 0 |#t~string6.base|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (= |ULTIMATE.start_base2flt_#in~e| 0) (= |ULTIMATE.start_base2flt_#in~m| 1) (<= 0 |#StackHeapBarrier|) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-10-24 10:10:25,522 INFO L853 garLoopResultBuilder]: At program point L71-2(lines 20 73) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-24 10:10:25,522 INFO L853 garLoopResultBuilder]: At program point L71-3(lines 20 73) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-24 10:10:25,522 INFO L857 garLoopResultBuilder]: For program point L187(lines 187 192) no Hoare annotation was computed. [2021-10-24 10:10:25,522 INFO L857 garLoopResultBuilder]: For program point L171(lines 171 176) no Hoare annotation was computed. [2021-10-24 10:10:25,522 INFO L857 garLoopResultBuilder]: For program point L39(lines 39 43) no Hoare annotation was computed. [2021-10-24 10:10:25,522 INFO L853 garLoopResultBuilder]: At program point L39-1(lines 29 44) the Hoare annotation is: false [2021-10-24 10:10:25,522 INFO L857 garLoopResultBuilder]: For program point L39-2(lines 39 43) no Hoare annotation was computed. [2021-10-24 10:10:25,523 INFO L853 garLoopResultBuilder]: At program point L39-3(lines 29 44) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~zero~0 0)) (.cse1 (<= ULTIMATE.start_main_~ea~2 127)) (.cse2 (<= 0 (+ ULTIMATE.start_main_~ea~2 128))) (.cse3 (<= ULTIMATE.start_main_~eb~2 127)) (.cse4 (<= 0 (+ ULTIMATE.start_main_~eb~2 128))) (.cse5 (= |#NULL.offset| 0)) (.cse6 (= |#t~string6.offset| 0)) (.cse7 (= |ULTIMATE.start_base2flt_#in~m| 1)) (.cse8 (= 0 |#t~string4.offset|)) (.cse9 (= |#NULL.base| 0))) (or (and (< (mod ULTIMATE.start_base2flt_~m 4294967296) 16777216) (<= 0 |#t~string4.base|) (<= (+ ULTIMATE.start_base2flt_~e 1) 0) .cse0 .cse1 .cse2 (<= 0 |#t~string5.base|) .cse3 (<= 0 |#t~string5.offset|) .cse4 (<= 0 |#t~string6.base|) .cse5 .cse6 (= |ULTIMATE.start_base2flt_#in~e| 0) .cse7 (<= 0 |#StackHeapBarrier|) (<= |#t~string5.offset| 0) .cse8 .cse9) (let ((.cse10 (select |#memory_int| |#t~string4.base|))) (and (< |#StackHeapBarrier| |#t~string6.base|) .cse0 .cse1 (< |#StackHeapBarrier| |#t~string5.base|) .cse2 (= (select |#valid| |#t~string5.base|) 1) (= (select |#valid| |#t~string4.base|) 1) (= |#t~string5.offset| 0) .cse3 .cse4 (= (select |#valid| |#t~string6.base|) 1) (= |ULTIMATE.start_base2flt_#in~m| ULTIMATE.start_base2flt_~m) (= (select |#valid| 0) 0) (< |#StackHeapBarrier| |#t~string4.base|) (= (select |#length| |#t~string6.base|) 12) (= (select .cse10 (+ 1 |#t~string4.offset|)) 0) .cse5 .cse6 (= |ULTIMATE.start_base2flt_#in~e| ULTIMATE.start_base2flt_~e) (= (select |#length| |#t~string4.base|) 2) (= ULTIMATE.start_base2flt_~e 0) (= (select .cse10 |#t~string4.offset|) 48) .cse7 (= 22 (select |#length| |#t~string5.base|)) .cse8 (< 0 |#StackHeapBarrier|) .cse9)))) [2021-10-24 10:10:25,523 INFO L857 garLoopResultBuilder]: For program point L39-4(lines 39 43) no Hoare annotation was computed. [2021-10-24 10:10:25,523 INFO L853 garLoopResultBuilder]: At program point L39-5(lines 29 44) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-24 10:10:25,523 INFO L857 garLoopResultBuilder]: For program point L39-6(lines 39 43) no Hoare annotation was computed. [2021-10-24 10:10:25,523 INFO L853 garLoopResultBuilder]: At program point L39-7(lines 29 44) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-24 10:10:25,523 INFO L857 garLoopResultBuilder]: For program point L8(lines 8 10) no Hoare annotation was computed. [2021-10-24 10:10:25,523 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 10:10:25,523 INFO L857 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-10-24 10:10:25,523 INFO L853 garLoopResultBuilder]: At program point L208(lines 149 210) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~zero~0 0))) (or (and .cse0 (= ULTIMATE.start_main_~sa~0 1)) (and .cse0 (= ULTIMATE.start_mulflt_~__retres10~1 0)))) [2021-10-24 10:10:25,523 INFO L857 garLoopResultBuilder]: For program point L27(lines 27 67) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L857 garLoopResultBuilder]: For program point L27-1(lines 27 67) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L857 garLoopResultBuilder]: For program point L27-2(lines 27 67) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L857 garLoopResultBuilder]: For program point L27-3(lines 27 67) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L857 garLoopResultBuilder]: For program point L177(lines 177 182) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L857 garLoopResultBuilder]: For program point L195(lines 195 200) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L857 garLoopResultBuilder]: For program point L30(lines 29 44) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L857 garLoopResultBuilder]: For program point L30-1(lines 29 44) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L857 garLoopResultBuilder]: For program point L30-2(lines 29 44) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L857 garLoopResultBuilder]: For program point L30-3(lines 29 44) no Hoare annotation was computed. [2021-10-24 10:10:25,524 INFO L853 garLoopResultBuilder]: At program point L65(lines 27 67) the Hoare annotation is: false [2021-10-24 10:10:25,525 INFO L853 garLoopResultBuilder]: At program point L65-1(lines 27 67) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= (+ ULTIMATE.start_base2flt_~e 1) 0) (= ULTIMATE.start_main_~zero~0 0) (<= ULTIMATE.start_main_~ea~2 127) (<= 0 (+ ULTIMATE.start_main_~ea~2 128)) (<= 0 |#t~string5.base|) (<= ULTIMATE.start_main_~eb~2 127) (<= 0 |#t~string5.offset|) (<= 0 (+ ULTIMATE.start_main_~eb~2 128)) (<= 0 |#t~string6.base|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (= |ULTIMATE.start_base2flt_#in~e| 0) (= |ULTIMATE.start_base2flt_#in~m| 1) (<= 0 |#StackHeapBarrier|) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-10-24 10:10:25,525 INFO L853 garLoopResultBuilder]: At program point L65-2(lines 27 67) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-24 10:10:25,526 INFO L853 garLoopResultBuilder]: At program point L65-3(lines 27 67) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-24 10:10:25,526 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2021-10-24 10:10:25,526 INFO L853 garLoopResultBuilder]: At program point L49-2(lines 49 64) the Hoare annotation is: false [2021-10-24 10:10:25,526 INFO L853 garLoopResultBuilder]: At program point L49-5(lines 49 64) the Hoare annotation is: false [2021-10-24 10:10:25,526 INFO L853 garLoopResultBuilder]: At program point L49-8(lines 49 64) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-24 10:10:25,526 INFO L853 garLoopResultBuilder]: At program point L49-11(lines 49 64) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-24 10:10:25,527 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 264) no Hoare annotation was computed. [2021-10-24 10:10:25,527 INFO L860 garLoopResultBuilder]: At program point L248-1(lines 248 264) the Hoare annotation is: true [2021-10-24 10:10:25,527 INFO L857 garLoopResultBuilder]: For program point L50(lines 49 64) no Hoare annotation was computed. [2021-10-24 10:10:25,527 INFO L857 garLoopResultBuilder]: For program point L50-1(lines 49 64) no Hoare annotation was computed. [2021-10-24 10:10:25,527 INFO L857 garLoopResultBuilder]: For program point L50-2(lines 49 64) no Hoare annotation was computed. [2021-10-24 10:10:25,527 INFO L857 garLoopResultBuilder]: For program point L50-3(lines 49 64) no Hoare annotation was computed. [2021-10-24 10:10:25,527 INFO L857 garLoopResultBuilder]: For program point L150-2(lines 149 210) no Hoare annotation was computed. [2021-10-24 10:10:25,528 INFO L857 garLoopResultBuilder]: For program point L51(lines 49 64) no Hoare annotation was computed. [2021-10-24 10:10:25,528 INFO L857 garLoopResultBuilder]: For program point L51-1(lines 49 64) no Hoare annotation was computed. [2021-10-24 10:10:25,528 INFO L857 garLoopResultBuilder]: For program point L51-2(lines 49 64) no Hoare annotation was computed. [2021-10-24 10:10:25,528 INFO L857 garLoopResultBuilder]: For program point L51-3(lines 49 64) no Hoare annotation was computed. [2021-10-24 10:10:25,532 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:10:25,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:10:25 BoogieIcfgContainer [2021-10-24 10:10:25,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:10:25,558 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:10:25,558 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:10:25,558 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:10:25,559 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:08:36" (3/4) ... [2021-10-24 10:10:25,561 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:10:25,573 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 36 nodes and edges [2021-10-24 10:10:25,578 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-24 10:10:25,579 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-24 10:10:25,580 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:10:25,603 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((((((unknown-#StackHeapBarrier-unknown < "reach_error" && ea <= 127) && unknown-#StackHeapBarrier-unknown < "soft_float_2a.c.cil.c") && 0 <= ea + 128) && \valid["soft_float_2a.c.cil.c"] == 1) && \valid["0"] == 1) && "soft_float_2a.c.cil.c" == 0) && eb <= 127) && \old(m) == 0) && __retres4 == 0) && 0 <= eb + 128) && \valid["reach_error"] == 1) && \old(m) == m) && \valid[0] == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["reach_error"] == 12) && unknown-#memory_int-unknown["0"][1 + "0"] == 0) && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(e) == e) && unknown-#length-unknown["0"] == 2) && unknown-#memory_int-unknown["0"]["0"] == 48) && 22 == unknown-#length-unknown["soft_float_2a.c.cil.c"]) && 0 == "0") && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 [2021-10-24 10:10:25,605 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((0 <= "0" && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_2a.c.cil.c") && eb <= 127) && 0 <= "soft_float_2a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_2a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0 [2021-10-24 10:10:25,605 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((m % 4294967296 < 16777216 && 0 <= "0") && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_2a.c.cil.c") && eb <= 127) && 0 <= "soft_float_2a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_2a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0) || ((((((((((((((((((((((((((unknown-#StackHeapBarrier-unknown < "reach_error" && zero == 0) && ea <= 127) && unknown-#StackHeapBarrier-unknown < "soft_float_2a.c.cil.c") && 0 <= ea + 128) && \valid["soft_float_2a.c.cil.c"] == 1) && \valid["0"] == 1) && "soft_float_2a.c.cil.c" == 0) && eb <= 127) && 0 <= eb + 128) && \valid["reach_error"] == 1) && \old(m) == m) && \valid[0] == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["reach_error"] == 12) && unknown-#memory_int-unknown["0"][1 + "0"] == 0) && #NULL == 0) && "reach_error" == 0) && \old(e) == e) && unknown-#length-unknown["0"] == 2) && e == 0) && unknown-#memory_int-unknown["0"]["0"] == 48) && \old(m) == 1) && 22 == unknown-#length-unknown["soft_float_2a.c.cil.c"]) && 0 == "0") && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) [2021-10-24 10:10:25,606 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((0 <= "0" && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_2a.c.cil.c") && eb <= 127) && 0 <= "soft_float_2a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_2a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0 [2021-10-24 10:10:25,655 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:10:25,656 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:10:25,656 INFO L168 Benchmark]: Toolchain (without parser) took 110497.15 ms. Allocated memory was 98.6 MB in the beginning and 180.4 MB in the end (delta: 81.8 MB). Free memory was 58.1 MB in the beginning and 84.0 MB in the end (delta: -25.9 MB). Peak memory consumption was 56.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:10:25,657 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 98.6 MB. Free memory is still 74.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:10:25,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.58 ms. Allocated memory is still 98.6 MB. Free memory was 57.9 MB in the beginning and 71.6 MB in the end (delta: -13.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:10:25,659 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.25 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 69.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:10:25,661 INFO L168 Benchmark]: Boogie Preprocessor took 30.95 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 67.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:10:25,661 INFO L168 Benchmark]: RCFGBuilder took 762.75 ms. Allocated memory is still 98.6 MB. Free memory was 67.7 MB in the beginning and 44.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:10:25,661 INFO L168 Benchmark]: TraceAbstraction took 109063.84 ms. Allocated memory was 98.6 MB in the beginning and 180.4 MB in the end (delta: 81.8 MB). Free memory was 44.1 MB in the beginning and 89.2 MB in the end (delta: -45.1 MB). Peak memory consumption was 84.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:10:25,661 INFO L168 Benchmark]: Witness Printer took 97.97 ms. Allocated memory is still 180.4 MB. Free memory was 89.2 MB in the beginning and 84.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:10:25,662 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 98.6 MB. Free memory is still 74.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 478.58 ms. Allocated memory is still 98.6 MB. Free memory was 57.9 MB in the beginning and 71.6 MB in the end (delta: -13.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.25 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 69.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.95 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 67.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 762.75 ms. Allocated memory is still 98.6 MB. Free memory was 67.7 MB in the beginning and 44.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 109063.84 ms. Allocated memory was 98.6 MB in the beginning and 180.4 MB in the end (delta: 81.8 MB). Free memory was 44.1 MB in the beginning and 89.2 MB in the end (delta: -45.1 MB). Peak memory consumption was 84.7 MB. Max. memory is 16.1 GB. * Witness Printer took 97.97 ms. Allocated memory is still 180.4 MB. Free memory was 89.2 MB in the beginning and 84.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 9]: 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, 55 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 108974.3ms, OverallIterations: 16, TraceHistogramMax: 2, EmptinessCheckTime: 26.6ms, AutomataDifference: 14692.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1731.2ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 817 SDtfs, 1068 SDslu, 4408 SDs, 0 SdLazy, 6712 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11253.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1078 GetRequests, 750 SyntacticMatches, 12 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 78602.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=13, InterpolantAutomatonStates: 260, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 156.0ms AutomataMinimizationTime, 16 MinimizatonAttempts, 251 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 18 PreInvPairs, 81 NumberOfFragments, 453 HoareAnnotationTreeSize, 18 FomulaSimplifications, 312410 FormulaSimplificationTreeSizeReduction, 568.5ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 2745 FormulaSimplificationTreeSizeReductionInter, 1151.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 179.2ms SsaConstructionTime, 520.0ms SatisfiabilityAnalysisTime, 3855.1ms InterpolantComputationTime, 776 NumberOfCodeBlocks, 776 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1097 ConstructedInterpolants, 0 QuantifiedInterpolants, 2666 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1773 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 42 InterpolantComputations, 9 PerfectInterpolantSequences, 18/87 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: OVERALL_TIME[ms]: 6556, ICFG_INTERPRETER_ENTERED_PROCEDURES: 10, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 278, DAG_INTERPRETER_EARLY_EXITS: 10, TOOLS_POST_APPLICATIONS: 358, TOOLS_POST_TIME[ms]: 2595, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 358, TOOLS_QUANTIFIERELIM_TIME[ms]: 2507, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 207, FLUID_QUERY_TIME[ms]: 19, FLUID_QUERIES: 686, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 30, DOMAIN_JOIN_TIME[ms]: 1504, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 20, DOMAIN_WIDEN_TIME[ms]: 1147, DOMAIN_ISSUBSETEQ_APPLICATIONS: 30, DOMAIN_ISSUBSETEQ_TIME[ms]: 96, DOMAIN_ISBOTTOM_APPLICATIONS: 278, DOMAIN_ISBOTTOM_TIME[ms]: 957, LOOP_SUMMARIZER_APPLICATIONS: 10, LOOP_SUMMARIZER_CACHE_MISSES: 10, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1692, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1691, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 30, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 5, PATH_EXPR_TIME[ms]: 12, REGEX_TO_DAG_TIME[ms]: 9, DAG_COMPRESSION_TIME[ms]: 98, DAG_COMPRESSION_PROCESSED_NODES: 7013, DAG_COMPRESSION_RETAINED_NODES: 654, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: ((((((((((((((((((m % 4294967296 < 16777216 && 0 <= "0") && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_2a.c.cil.c") && eb <= 127) && 0 <= "soft_float_2a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_2a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0) || ((((((((((((((((((((((((((unknown-#StackHeapBarrier-unknown < "reach_error" && zero == 0) && ea <= 127) && unknown-#StackHeapBarrier-unknown < "soft_float_2a.c.cil.c") && 0 <= ea + 128) && \valid["soft_float_2a.c.cil.c"] == 1) && \valid["0"] == 1) && "soft_float_2a.c.cil.c" == 0) && eb <= 127) && 0 <= eb + 128) && \valid["reach_error"] == 1) && \old(m) == m) && \valid[0] == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["reach_error"] == 12) && unknown-#memory_int-unknown["0"][1 + "0"] == 0) && #NULL == 0) && "reach_error" == 0) && \old(e) == e) && unknown-#length-unknown["0"] == 2) && e == 0) && unknown-#memory_int-unknown["0"]["0"] == 48) && \old(m) == 1) && 22 == unknown-#length-unknown["soft_float_2a.c.cil.c"]) && 0 == "0") && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((0 <= "0" && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_2a.c.cil.c") && eb <= 127) && 0 <= "soft_float_2a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_2a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((unknown-#StackHeapBarrier-unknown < "reach_error" && ea <= 127) && unknown-#StackHeapBarrier-unknown < "soft_float_2a.c.cil.c") && 0 <= ea + 128) && \valid["soft_float_2a.c.cil.c"] == 1) && \valid["0"] == 1) && "soft_float_2a.c.cil.c" == 0) && eb <= 127) && \old(m) == 0) && __retres4 == 0) && 0 <= eb + 128) && \valid["reach_error"] == 1) && \old(m) == m) && \valid[0] == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["reach_error"] == 12) && unknown-#memory_int-unknown["0"][1 + "0"] == 0) && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(e) == e) && unknown-#length-unknown["0"] == 2) && unknown-#memory_int-unknown["0"]["0"] == 48) && 22 == unknown-#length-unknown["soft_float_2a.c.cil.c"]) && 0 == "0") && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: ((((((((((((((((0 <= "0" && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_2a.c.cil.c") && eb <= 127) && 0 <= "soft_float_2a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_2a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 149]: Loop Invariant Derived loop invariant: (zero == 0 && sa == 1) || (zero == 0 && __retres10 == 0) - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 248]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-10-24 10:10:25,895 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-24 10:10:25,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af87a3ec-eab9-4697-b72d-48ec93fe7ba2/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...