./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW --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 9e3997a2a1cd8cbe038fe2c0a5bc044283ed06667aa7ef42f046d1134291f84e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:12:55,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:12:55,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:12:56,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:12:56,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:12:56,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:12:56,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:12:56,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:12:56,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:12:56,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:12:56,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:12:56,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:12:56,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:12:56,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:12:56,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:12:56,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:12:56,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:12:56,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:12:56,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:12:56,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:12:56,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:12:56,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:12:56,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:12:56,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:12:56,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:12:56,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:12:56,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:12:56,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:12:56,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:12:56,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:12:56,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:12:56,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:12:56,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:12:56,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:12:56,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:12:56,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:12:56,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:12:56,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:12:56,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:12:56,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:12:56,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:12:56,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:12:56,118 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:12:56,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:12:56,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:12:56,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:12:56,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:12:56,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:12:56,121 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:12:56,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:12:56,121 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:12:56,121 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:12:56,122 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:12:56,123 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:12:56,123 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:12:56,123 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:12:56,123 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:12:56,123 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:12:56,124 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:12:56,124 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:12:56,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:12:56,125 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:12:56,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:12:56,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:12:56,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:12:56,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:12:56,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:12:56,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:12:56,127 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:12:56,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:12:56,127 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:12:56,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:12:56,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:12:56,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:12:56,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:12:56,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:12:56,129 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:12:56,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:12:56,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:12:56,130 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:12:56,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:12:56,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:12:56,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:12:56,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e3997a2a1cd8cbe038fe2c0a5bc044283ed06667aa7ef42f046d1134291f84e [2022-11-23 15:12:56,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:12:56,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:12:56,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:12:56,481 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:12:56,482 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:12:56,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i [2022-11-23 15:12:59,543 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:12:59,744 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:12:59,744 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i [2022-11-23 15:12:59,750 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/data/8d82d0b55/2832602685c94bc0b3aeb65b2fe6d8d3/FLAG4e58e3001 [2022-11-23 15:12:59,765 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/data/8d82d0b55/2832602685c94bc0b3aeb65b2fe6d8d3 [2022-11-23 15:12:59,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:12:59,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:12:59,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:12:59,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:12:59,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:12:59,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:12:59" (1/1) ... [2022-11-23 15:12:59,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef6563d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:59, skipping insertion in model container [2022-11-23 15:12:59,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:12:59" (1/1) ... [2022-11-23 15:12:59,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:12:59,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:12:59,976 WARN L237 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_93cabb77-a39c-45e0-b392-cae30a882721/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i[821,834] [2022-11-23 15:12:59,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:13:00,003 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:13:00,024 WARN L237 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_93cabb77-a39c-45e0-b392-cae30a882721/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i[821,834] [2022-11-23 15:13:00,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:13:00,046 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:13:00,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00 WrapperNode [2022-11-23 15:13:00,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:13:00,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:13:00,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:13:00,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:13:00,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,087 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-11-23 15:13:00,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:13:00,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:13:00,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:13:00,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:13:00,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,117 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:13:00,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:13:00,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:13:00,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:13:00,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (1/1) ... [2022-11-23 15:13:00,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:13:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:00,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:13:00,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:13:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:13:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:13:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:13:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:13:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:13:00,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:13:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:13:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:13:00,308 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:13:00,311 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:13:00,518 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:13:00,569 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:13:00,569 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-23 15:13:00,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:00 BoogieIcfgContainer [2022-11-23 15:13:00,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:13:00,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:13:00,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:13:00,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:13:00,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:12:59" (1/3) ... [2022-11-23 15:13:00,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f99760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:00, skipping insertion in model container [2022-11-23 15:13:00,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:00" (2/3) ... [2022-11-23 15:13:00,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f99760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:00, skipping insertion in model container [2022-11-23 15:13:00,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:00" (3/3) ... [2022-11-23 15:13:00,594 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2022-11-23 15:13:00,614 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:13:00,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:13:00,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:13:00,669 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1eee7ec2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:13:00,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:13:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:13:00,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:00,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:00,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash 801437090, now seen corresponding path program 1 times [2022-11-23 15:13:00,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:00,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327165014] [2022-11-23 15:13:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:13:01,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327165014] [2022-11-23 15:13:01,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327165014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:13:01,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:13:01,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:13:01,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035463556] [2022-11-23 15:13:01,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:13:01,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:13:01,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:01,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:13:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:13:01,094 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:01,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:01,197 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2022-11-23 15:13:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:13:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 15:13:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:01,210 INFO L225 Difference]: With dead ends: 24 [2022-11-23 15:13:01,211 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 15:13:01,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:13:01,221 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:01,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:13:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 15:13:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 15:13:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:01,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-23 15:13:01,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2022-11-23 15:13:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:01,276 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-23 15:13:01,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-23 15:13:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:13:01,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:01,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:13:01,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:01,284 INFO L85 PathProgramCache]: Analyzing trace with hash -540314057, now seen corresponding path program 1 times [2022-11-23 15:13:01,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:01,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252209349] [2022-11-23 15:13:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:01,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:13:01,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:01,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252209349] [2022-11-23 15:13:01,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252209349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:01,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527509993] [2022-11-23 15:13:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:01,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:01,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:01,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:01,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:13:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:01,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:13:01,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:13:01,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:13:01,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527509993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:01,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308550760] [2022-11-23 15:13:01,662 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 15:13:01,662 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:13:01,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:13:01,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:13:01,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:13:01,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:01,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:01,813 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:13:01,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:13:01,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:01,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:01,894 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:13:01,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:13:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:01,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 15:13:02,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:02,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:02,115 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:13:02,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 236 [2022-11-23 15:13:02,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:13:02,358 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:13:02,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:13:02,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:02,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:02,452 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:13:02,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 99 [2022-11-23 15:13:02,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:02,572 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:02,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:02,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 15:13:02,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:02,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:02,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:02,691 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 15:13:02,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2022-11-23 15:13:02,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:02,755 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 15:13:02,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2022-11-23 15:13:02,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:02,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '150#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:02,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:02,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:02,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 15:13:02,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633639654] [2022-11-23 15:13:02,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:02,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:13:02,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:02,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:13:02,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:13:02,953 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2022-11-23 15:13:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:03,050 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2022-11-23 15:13:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:13:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 12 [2022-11-23 15:13:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:03,051 INFO L225 Difference]: With dead ends: 37 [2022-11-23 15:13:03,052 INFO L226 Difference]: Without dead ends: 26 [2022-11-23 15:13:03,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:13:03,054 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:03,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:13:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-23 15:13:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-23 15:13:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2022-11-23 15:13:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-23 15:13:03,061 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 12 [2022-11-23 15:13:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:03,061 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-23 15:13:03,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2022-11-23 15:13:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-23 15:13:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 15:13:03,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:03,063 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:03,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:03,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:03,268 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:03,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1881022878, now seen corresponding path program 2 times [2022-11-23 15:13:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:03,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394835356] [2022-11-23 15:13:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:03,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:13:03,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:03,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394835356] [2022-11-23 15:13:03,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394835356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:03,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318905549] [2022-11-23 15:13:03,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:13:03,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:03,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:03,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:03,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:13:03,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:13:03,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:13:03,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:13:03,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:13:03,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:13:03,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318905549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756605420] [2022-11-23 15:13:03,777 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 15:13:03,777 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:13:03,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:13:03,783 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:13:03,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:13:03,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:03,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:03,857 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:13:03,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:13:03,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:03,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:03,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 15:13:03,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:03,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:13:03,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:04,010 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:13:04,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 235 [2022-11-23 15:13:04,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:13:04,128 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:13:04,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:13:04,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:04,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:04,213 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:13:04,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 99 [2022-11-23 15:13:04,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:04,276 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:04,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:04,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:04,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:04,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:04,373 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 15:13:04,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2022-11-23 15:13:04,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:04,430 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 15:13:04,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2022-11-23 15:13:04,449 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:04,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '417#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:04,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:04,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:04,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-11-23 15:13:04,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040965645] [2022-11-23 15:13:04,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:04,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:13:04,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:04,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:13:04,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:13:04,621 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:04,754 INFO L93 Difference]: Finished difference Result 70 states and 101 transitions. [2022-11-23 15:13:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:13:04,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 15:13:04,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:04,756 INFO L225 Difference]: With dead ends: 70 [2022-11-23 15:13:04,756 INFO L226 Difference]: Without dead ends: 50 [2022-11-23 15:13:04,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:13:04,757 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:04,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:13:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-23 15:13:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-23 15:13:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2022-11-23 15:13:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-23 15:13:04,769 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 24 [2022-11-23 15:13:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:04,769 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-23 15:13:04,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-23 15:13:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 15:13:04,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:04,771 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:04,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:04,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:04,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:04,978 INFO L85 PathProgramCache]: Analyzing trace with hash 658702210, now seen corresponding path program 3 times [2022-11-23 15:13:04,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:04,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629586261] [2022-11-23 15:13:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:04,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-23 15:13:05,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629586261] [2022-11-23 15:13:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629586261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304384905] [2022-11-23 15:13:05,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:13:05,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:05,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:05,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:05,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:13:05,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:13:05,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:13:05,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:13:05,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-23 15:13:05,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-23 15:13:05,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304384905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:05,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263091332] [2022-11-23 15:13:05,852 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 15:13:05,852 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:13:05,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:13:05,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:13:05,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:13:05,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:05,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:05,909 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:13:05,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:13:05,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:05,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:05,967 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:13:05,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:13:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:05,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:13:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:06,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:06,073 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:13:06,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 235 [2022-11-23 15:13:06,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:13:06,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:06,156 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:06,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:06,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:06,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:06,191 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:13:06,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:13:06,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:06,227 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:06,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:06,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:06,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:06,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:06,320 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 15:13:06,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2022-11-23 15:13:06,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:06,363 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 15:13:06,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2022-11-23 15:13:06,384 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:06,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '954#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:06,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:06,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:06,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 15:13:06,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502578912] [2022-11-23 15:13:06,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:06,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:13:06,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:06,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:13:06,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:13:06,646 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:06,964 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2022-11-23 15:13:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 15:13:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-23 15:13:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:06,966 INFO L225 Difference]: With dead ends: 136 [2022-11-23 15:13:06,966 INFO L226 Difference]: Without dead ends: 98 [2022-11-23 15:13:06,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:13:06,968 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:06,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:13:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-23 15:13:06,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-23 15:13:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 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) [2022-11-23 15:13:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-11-23 15:13:06,981 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 48 [2022-11-23 15:13:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:06,982 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-11-23 15:13:06,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-11-23 15:13:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 15:13:06,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:06,985 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:06,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:07,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1904634306, now seen corresponding path program 4 times [2022-11-23 15:13:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785563261] [2022-11-23 15:13:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:07,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-23 15:13:08,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:08,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785563261] [2022-11-23 15:13:08,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785563261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:08,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100561315] [2022-11-23 15:13:08,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:13:08,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:08,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:08,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:08,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:13:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:08,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:13:08,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-23 15:13:08,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-23 15:13:09,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100561315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:09,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317118272] [2022-11-23 15:13:09,571 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 15:13:09,571 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:13:09,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:13:09,572 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:13:09,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:13:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:09,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:09,639 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:13:09,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:13:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:09,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:09,693 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:13:09,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:13:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:09,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:13:09,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:09,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:09,812 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:13:09,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 235 [2022-11-23 15:13:09,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:13:09,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:09,917 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:09,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:09,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:09,973 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:13:09,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:13:10,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:10,012 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:10,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:10,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:10,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:10,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 15:13:10,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:10,097 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 15:13:10,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2022-11-23 15:13:10,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:10,141 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 15:13:10,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2022-11-23 15:13:10,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:10,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2031#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:10,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:10,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:10,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-23 15:13:10,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108419941] [2022-11-23 15:13:10,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:10,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 15:13:10,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 15:13:10,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 15:13:10,363 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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) [2022-11-23 15:13:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:11,039 INFO L93 Difference]: Finished difference Result 268 states and 371 transitions. [2022-11-23 15:13:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 15:13:11,040 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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 96 [2022-11-23 15:13:11,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:11,043 INFO L225 Difference]: With dead ends: 268 [2022-11-23 15:13:11,043 INFO L226 Difference]: Without dead ends: 194 [2022-11-23 15:13:11,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 15:13:11,052 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:11,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:13:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-23 15:13:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-11-23 15:13:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 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) [2022-11-23 15:13:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-11-23 15:13:11,089 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 96 [2022-11-23 15:13:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:11,090 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-11-23 15:13:11,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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) [2022-11-23 15:13:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-11-23 15:13:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-23 15:13:11,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:11,093 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:11,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 15:13:11,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:11,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash -721822142, now seen corresponding path program 5 times [2022-11-23 15:13:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:11,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752873528] [2022-11-23 15:13:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-11-23 15:13:14,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:14,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752873528] [2022-11-23 15:13:14,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752873528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:14,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717762806] [2022-11-23 15:13:14,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:13:14,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:14,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:14,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:14,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cabb77-a39c-45e0-b392-cae30a882721/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process