./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba --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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- 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-b5237d8 [2022-11-22 01:22:35,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:22:35,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:22:35,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:22:35,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:22:35,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:22:35,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:22:35,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:22:35,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:22:35,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:22:35,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:22:35,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:22:35,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:22:35,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:22:35,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:22:35,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:22:35,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:22:35,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:22:35,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:22:35,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:22:35,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:22:35,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:22:35,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:22:35,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:22:35,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:22:35,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:22:35,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:22:35,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:22:35,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:22:35,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:22:35,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:22:35,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:22:35,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:22:35,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:22:35,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:22:35,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:22:35,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:22:35,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:22:35,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:22:35,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:22:35,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:22:35,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:22:35,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:22:35,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:22:35,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:22:35,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:22:35,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:22:35,175 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:22:35,175 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:22:35,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:22:35,176 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:22:35,176 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:22:35,177 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:22:35,177 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:22:35,178 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:22:35,178 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:22:35,178 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:22:35,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:22:35,179 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:22:35,179 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:22:35,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:22:35,180 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:22:35,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:22:35,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:22:35,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:22:35,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:22:35,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:22:35,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:22:35,183 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:22:35,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:22:35,183 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:22:35,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:22:35,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:22:35,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:22:35,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:22:35,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:22:35,186 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:22:35,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:22:35,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:22:35,187 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:22:35,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:22:35,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:22:35,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:22:35,188 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_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2022-11-22 01:22:35,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:22:35,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:22:35,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:22:35,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:22:35,565 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:22:35,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-11-22 01:22:38,610 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:22:38,818 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:22:38,819 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-11-22 01:22:38,827 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/data/da8d538a3/b315643eab554792991cdef6a202e403/FLAGebfdc86d7 [2022-11-22 01:22:38,847 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/data/da8d538a3/b315643eab554792991cdef6a202e403 [2022-11-22 01:22:38,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:22:38,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:22:38,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:22:38,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:22:38,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:22:38,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:22:38" (1/1) ... [2022-11-22 01:22:38,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6bd9b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:38, skipping insertion in model container [2022-11-22 01:22:38,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:22:38" (1/1) ... [2022-11-22 01:22:38,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:22:38,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:22:39,149 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_437dda27-212c-4d31-b1cf-97572b57a19c/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-11-22 01:22:39,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:22:39,191 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:22:39,206 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_437dda27-212c-4d31-b1cf-97572b57a19c/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-11-22 01:22:39,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:22:39,244 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:22:39,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39 WrapperNode [2022-11-22 01:22:39,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:22:39,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:22:39,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:22:39,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:22:39,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,288 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-22 01:22:39,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:22:39,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:22:39,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:22:39,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:22:39,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,323 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:22:39,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:22:39,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:22:39,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:22:39,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (1/1) ... [2022-11-22 01:22:39,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:22:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:39,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:22:39,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:22:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:22:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:22:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:22:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:22:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:22:39,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:22:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:22:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:22:39,533 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:22:39,535 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:22:39,748 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:22:39,807 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:22:39,807 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-22 01:22:39,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:22:39 BoogieIcfgContainer [2022-11-22 01:22:39,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:22:39,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:22:39,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:22:39,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:22:39,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:22:38" (1/3) ... [2022-11-22 01:22:39,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5980b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:22:39, skipping insertion in model container [2022-11-22 01:22:39,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:39" (2/3) ... [2022-11-22 01:22:39,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5980b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:22:39, skipping insertion in model container [2022-11-22 01:22:39,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:22:39" (3/3) ... [2022-11-22 01:22:39,832 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2022-11-22 01:22:39,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:22:39,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:22:39,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:22:39,971 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;@35a78c64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:22:39,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:22:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:22:39,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:22:39,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:39,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:39,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1443804038, now seen corresponding path program 1 times [2022-11-22 01:22:40,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:40,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166052961] [2022-11-22 01:22:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:40,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:22:40,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:40,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166052961] [2022-11-22 01:22:40,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166052961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:40,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:22:40,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:22:40,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155196899] [2022-11-22 01:22:40,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:40,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:22:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:40,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:22:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:22:40,370 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-11-22 01:22:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:40,451 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2022-11-22 01:22:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:22:40,453 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 [2022-11-22 01:22:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:40,461 INFO L225 Difference]: With dead ends: 25 [2022-11-22 01:22:40,462 INFO L226 Difference]: Without dead ends: 12 [2022-11-22 01:22:40,465 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 [2022-11-22 01:22:40,468 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:40,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:22:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-22 01:22:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-22 01:22:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2022-11-22 01:22:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-22 01:22:40,502 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2022-11-22 01:22:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:40,502 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-22 01:22:40,503 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) [2022-11-22 01:22:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-22 01:22:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:22:40,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:40,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:40,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:22:40,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash 322298903, now seen corresponding path program 1 times [2022-11-22 01:22:40,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:40,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831249866] [2022-11-22 01:22:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:40,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:22:40,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:40,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831249866] [2022-11-22 01:22:40,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831249866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:40,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200558823] [2022-11-22 01:22:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:40,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:40,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:40,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:40,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:22:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:22:40,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:22:40,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:22:40,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200558823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:40,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:22:40,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 5 [2022-11-22 01:22:40,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913154086] [2022-11-22 01:22:40,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:22:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:40,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:22:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:22:40,721 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:22:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:40,802 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-11-22 01:22:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:22:40,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:22:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:40,803 INFO L225 Difference]: With dead ends: 21 [2022-11-22 01:22:40,803 INFO L226 Difference]: Without dead ends: 14 [2022-11-22 01:22:40,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:22:40,805 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:40,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:22:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-22 01:22:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-22 01:22:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2022-11-22 01:22:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-11-22 01:22:40,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2022-11-22 01:22:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:40,811 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-11-22 01:22:40,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:22:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-11-22 01:22:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:22:40,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:40,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:40,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:41,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:41,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:41,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:41,029 INFO L85 PathProgramCache]: Analyzing trace with hash 537647847, now seen corresponding path program 1 times [2022-11-22 01:22:41,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:41,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409976878] [2022-11-22 01:22:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:41,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:22:41,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:41,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409976878] [2022-11-22 01:22:41,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409976878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:41,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817006102] [2022-11-22 01:22:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:41,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:41,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:41,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:22:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:22:41,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:22:41,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:22:41,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817006102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:41,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551191226] [2022-11-22 01:22:41,309 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:22:41,309 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:41,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:41,319 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:41,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:41,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:41,412 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:22:41,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:22:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:41,448 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:22:41,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:22:41,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:41,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:22:41,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:41,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:41,627 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:22:41,628 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 192 treesize of output 191 [2022-11-22 01:22:41,786 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 [2022-11-22 01:22:41,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:22:41,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [551191226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:41,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:22:41,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2022-11-22 01:22:41,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665568487] [2022-11-22 01:22:41,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:41,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:22:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:22:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:22:41,943 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-22 01:22:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:42,017 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2022-11-22 01:22:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:22:42,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-11-22 01:22:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:42,021 INFO L225 Difference]: With dead ends: 24 [2022-11-22 01:22:42,021 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 01:22:42,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:22:42,034 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:42,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:22:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 01:22:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-11-22 01:22:42,042 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) [2022-11-22 01:22:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-22 01:22:42,043 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 11 [2022-11-22 01:22:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:42,043 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-22 01:22:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-22 01:22:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-22 01:22:42,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:22:42,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:42,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:42,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:42,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:42,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1838473358, now seen corresponding path program 1 times [2022-11-22 01:22:42,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:42,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045784968] [2022-11-22 01:22:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:22:42,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:42,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045784968] [2022-11-22 01:22:42,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045784968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:42,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268263190] [2022-11-22 01:22:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:42,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:42,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:42,360 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:42,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:22:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:22:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:22:42,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:22:42,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268263190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:42,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715127280] [2022-11-22 01:22:42,459 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:22:42,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:42,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:42,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:42,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:42,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:42,502 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:22:42,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:22:42,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:42,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:22:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:42,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-22 01:22:42,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:42,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:42,649 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:22:42,650 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 202 treesize of output 190 [2022-11-22 01:22:42,725 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 [2022-11-22 01:22:42,908 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:22:43,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '358#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:22:43,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:22:43,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:22:43,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-22 01:22:43,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399869117] [2022-11-22 01:22:43,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:22:43,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:22:43,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:43,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:22:43,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:22:43,324 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) [2022-11-22 01:22:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:43,408 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2022-11-22 01:22:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:22:43,408 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 [2022-11-22 01:22:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:43,409 INFO L225 Difference]: With dead ends: 46 [2022-11-22 01:22:43,409 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 01:22:43,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:22:43,411 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:43,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 24 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:22:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 01:22:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 17. [2022-11-22 01:22:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2022-11-22 01:22:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-22 01:22:43,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-11-22 01:22:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:43,427 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-22 01:22:43,427 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) [2022-11-22 01:22:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-22 01:22:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:22:43,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:43,428 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:43,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:43,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash 179221003, now seen corresponding path program 2 times [2022-11-22 01:22:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:43,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325726246] [2022-11-22 01:22:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:43,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:22:43,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:43,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325726246] [2022-11-22 01:22:43,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325726246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:43,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123083753] [2022-11-22 01:22:43,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:22:43,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:43,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:43,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:43,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:22:43,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:22:43,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:22:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:22:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:22:43,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:22:43,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123083753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:43,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714917661] [2022-11-22 01:22:43,915 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:22:43,916 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:43,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:43,916 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:43,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:43,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:43,953 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:22:43,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:22:43,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:43,983 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:22:43,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:22:44,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:44,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:22:44,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:44,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,107 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:22:44,107 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 192 treesize of output 191 [2022-11-22 01:22:44,200 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 [2022-11-22 01:22:44,375 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:22:44,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '556#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:22:44,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:22:44,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:22:44,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-22 01:22:44,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474913570] [2022-11-22 01:22:44,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:22:44,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:22:44,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:44,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:22:44,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:22:44,720 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2022-11-22 01:22:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:44,818 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-11-22 01:22:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:22:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 01:22:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:44,820 INFO L225 Difference]: With dead ends: 32 [2022-11-22 01:22:44,820 INFO L226 Difference]: Without dead ends: 23 [2022-11-22 01:22:44,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:22:44,822 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:44,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:22:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-22 01:22:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-22 01:22:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2022-11-22 01:22:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-22 01:22:44,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 15 [2022-11-22 01:22:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:44,837 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-22 01:22:44,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2022-11-22 01:22:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-22 01:22:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:22:44,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:44,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:44,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:45,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:45,045 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash -973540485, now seen corresponding path program 3 times [2022-11-22 01:22:45,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:45,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825906926] [2022-11-22 01:22:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:45,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:22:45,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825906926] [2022-11-22 01:22:45,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825906926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:45,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545834962] [2022-11-22 01:22:45,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:22:45,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:45,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:45,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:45,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:22:45,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:22:45,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:22:45,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:22:45,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:22:45,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:22:45,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545834962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:45,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057973467] [2022-11-22 01:22:45,353 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:22:45,354 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:45,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:45,354 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:45,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:45,384 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:22:45,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:22:45,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:45,411 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:22:45,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:22:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:45,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:22:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:45,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,539 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:22:45,540 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 192 treesize of output 191 [2022-11-22 01:22:45,649 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 [2022-11-22 01:22:45,794 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:22:46,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '794#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:22:46,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:22:46,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:22:46,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 14 [2022-11-22 01:22:46,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965398581] [2022-11-22 01:22:46,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:22:46,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:22:46,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:46,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:22:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:22:46,156 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2022-11-22 01:22:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:46,360 INFO L93 Difference]: Finished difference Result 65 states and 97 transitions. [2022-11-22 01:22:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:22:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 21 [2022-11-22 01:22:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:46,362 INFO L225 Difference]: With dead ends: 65 [2022-11-22 01:22:46,362 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 01:22:46,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:22:46,363 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:46,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 35 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:22:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 01:22:46,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-22 01:22:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 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) [2022-11-22 01:22:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-11-22 01:22:46,389 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 21 [2022-11-22 01:22:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:46,389 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-11-22 01:22:46,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2022-11-22 01:22:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-11-22 01:22:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 01:22:46,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:46,391 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:46,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:46,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:46,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:46,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash -720959426, now seen corresponding path program 4 times [2022-11-22 01:22:46,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:46,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392178672] [2022-11-22 01:22:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:46,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-22 01:22:46,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:46,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392178672] [2022-11-22 01:22:46,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392178672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:46,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738870517] [2022-11-22 01:22:46,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:22:46,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:46,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:46,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:22:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:47,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:22:47,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-22 01:22:47,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-22 01:22:47,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738870517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:47,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30417458] [2022-11-22 01:22:47,299 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:22:47,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:47,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:47,300 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:47,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:47,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:47,327 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:22:47,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:22:47,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:47,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:22:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:47,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:22:47,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:47,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:47,433 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:22:47,433 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 192 treesize of output 191 [2022-11-22 01:22:47,550 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 [2022-11-22 01:22:47,679 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:22:48,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1265#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:22:48,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:22:48,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:22:48,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-22 01:22:48,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583124787] [2022-11-22 01:22:48,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:22:48,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 01:22:48,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:48,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 01:22:48,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:22:48,047 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 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) [2022-11-22 01:22:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:48,349 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2022-11-22 01:22:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 01:22:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 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 40 [2022-11-22 01:22:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:48,351 INFO L225 Difference]: With dead ends: 201 [2022-11-22 01:22:48,351 INFO L226 Difference]: Without dead ends: 172 [2022-11-22 01:22:48,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:22:48,352 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 459 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:48,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 96 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:22:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-22 01:22:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 55. [2022-11-22 01:22:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 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) [2022-11-22 01:22:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-11-22 01:22:48,369 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 40 [2022-11-22 01:22:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:48,370 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-11-22 01:22:48,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 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) [2022-11-22 01:22:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-11-22 01:22:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 01:22:48,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:48,371 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:48,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:48,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:48,576 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash -818477541, now seen corresponding path program 5 times [2022-11-22 01:22:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:48,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259472898] [2022-11-22 01:22:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:48,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-22 01:22:49,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:49,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259472898] [2022-11-22 01:22:49,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259472898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:49,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709238603] [2022-11-22 01:22:49,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:22:49,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:49,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:49,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:49,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:22:49,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:22:49,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:22:49,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:22:49,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 01:22:49,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:22:49,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709238603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:49,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:22:49,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26] total 30 [2022-11-22 01:22:49,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186989393] [2022-11-22 01:22:49,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:49,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:22:49,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:49,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:22:49,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:22:49,563 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:22:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:49,636 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-11-22 01:22:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:22:49,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-22 01:22:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:49,639 INFO L225 Difference]: With dead ends: 96 [2022-11-22 01:22:49,639 INFO L226 Difference]: Without dead ends: 89 [2022-11-22 01:22:49,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:22:49,642 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:49,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:22:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-22 01:22:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2022-11-22 01:22:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 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) [2022-11-22 01:22:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-11-22 01:22:49,674 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 53 [2022-11-22 01:22:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:49,677 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-11-22 01:22:49,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:22:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-11-22 01:22:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 01:22:49,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:49,681 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:49,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:49,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:49,888 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:49,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1546708006, now seen corresponding path program 6 times [2022-11-22 01:22:49,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:49,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148539673] [2022-11-22 01:22:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:49,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-22 01:22:50,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:50,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148539673] [2022-11-22 01:22:50,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148539673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:50,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718348067] [2022-11-22 01:22:50,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:22:50,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:50,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:50,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:50,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:22:50,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:22:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:22:50,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:22:50,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-11-22 01:22:50,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-11-22 01:22:51,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718348067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:51,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760246741] [2022-11-22 01:22:51,360 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:22:51,360 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:51,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:51,360 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:51,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:51,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:51,388 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:22:51,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:22:51,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:51,419 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:22:51,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:22:51,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:51,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:22:51,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:51,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:51,545 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:22:51,545 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 192 treesize of output 191 [2022-11-22 01:22:51,621 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 [2022-11-22 01:22:51,750 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:22:52,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2534#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:22:52,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:22:52,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:22:52,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 39 [2022-11-22 01:22:52,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280477259] [2022-11-22 01:22:52,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:22:52,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 01:22:52,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:52,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 01:22:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=1330, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 01:22:52,229 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 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) [2022-11-22 01:22:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:53,348 INFO L93 Difference]: Finished difference Result 224 states and 338 transitions. [2022-11-22 01:22:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-22 01:22:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 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 54 [2022-11-22 01:22:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:53,350 INFO L225 Difference]: With dead ends: 224 [2022-11-22 01:22:53,351 INFO L226 Difference]: Without dead ends: 169 [2022-11-22 01:22:53,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1440, Invalid=3530, Unknown=0, NotChecked=0, Total=4970 [2022-11-22 01:22:53,353 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 275 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:53,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 35 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:22:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-22 01:22:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 118. [2022-11-22 01:22:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3418803418803418) internal successors, (157), 117 states have internal predecessors, (157), 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) [2022-11-22 01:22:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2022-11-22 01:22:53,421 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 157 transitions. Word has length 54 [2022-11-22 01:22:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:53,421 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 157 transitions. [2022-11-22 01:22:53,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 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) [2022-11-22 01:22:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 157 transitions. [2022-11-22 01:22:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 01:22:53,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:53,429 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:53,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:53,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:53,635 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash -267468214, now seen corresponding path program 7 times [2022-11-22 01:22:53,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:53,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347889440] [2022-11-22 01:22:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:53,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-22 01:22:55,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:55,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347889440] [2022-11-22 01:22:55,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347889440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:55,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117361545] [2022-11-22 01:22:55,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:22:55,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:55,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:55,436 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:55,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:22:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:55,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-22 01:22:55,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-22 01:22:55,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-22 01:22:57,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117361545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:57,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800323469] [2022-11-22 01:22:57,774 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:22:57,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:57,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:57,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:57,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:57,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:57,807 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:22:57,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:22:57,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:57,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:22:57,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:57,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:22:57,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:57,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:57,917 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:22:57,918 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 192 treesize of output 191 [2022-11-22 01:22:57,985 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 [2022-11-22 01:22:58,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:22:58,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4000#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:22:58,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:22:58,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:22:58,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2022-11-22 01:22:58,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387566610] [2022-11-22 01:22:58,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:22:58,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-22 01:22:58,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-22 01:22:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=4011, Unknown=0, NotChecked=0, Total=6972 [2022-11-22 01:22:58,587 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. Second operand has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 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) [2022-11-22 01:23:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:00,137 INFO L93 Difference]: Finished difference Result 655 states and 922 transitions. [2022-11-22 01:23:00,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-22 01:23:00,138 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 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 116 [2022-11-22 01:23:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:00,141 INFO L225 Difference]: With dead ends: 655 [2022-11-22 01:23:00,141 INFO L226 Difference]: Without dead ends: 575 [2022-11-22 01:23:00,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2961, Invalid=4011, Unknown=0, NotChecked=0, Total=6972 [2022-11-22 01:23:00,145 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1518 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:00,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 252 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:23:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-22 01:23:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 156. [2022-11-22 01:23:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.2580645161290323) internal successors, (195), 155 states have internal predecessors, (195), 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) [2022-11-22 01:23:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 195 transitions. [2022-11-22 01:23:00,220 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 195 transitions. Word has length 116 [2022-11-22 01:23:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:00,220 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 195 transitions. [2022-11-22 01:23:00,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 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) [2022-11-22 01:23:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 195 transitions. [2022-11-22 01:23:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-22 01:23:00,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:00,222 INFO L195 NwaCegarLoop]: trace histogram [74, 35, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:23:00,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:00,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:00,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:00,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:00,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2007331030, now seen corresponding path program 8 times [2022-11-22 01:23:00,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:00,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901664815] [2022-11-22 01:23:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:00,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-22 01:23:05,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:05,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901664815] [2022-11-22 01:23:05,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901664815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:05,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801950305] [2022-11-22 01:23:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:23:05,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:05,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:05,364 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:05,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:23:05,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:23:05,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:23:05,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:23:05,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2022-11-22 01:23:05,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:23:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2022-11-22 01:23:05,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801950305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:23:05,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [198543306] [2022-11-22 01:23:05,981 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:23:05,981 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:23:05,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:23:05,982 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:23:05,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:23:06,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:06,015 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:23:06,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:23:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:06,039 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:23:06,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:23:06,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:06,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-22 01:23:06,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:06,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:06,119 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:23:06,119 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 202 treesize of output 190 [2022-11-22 01:23:06,163 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 [2022-11-22 01:23:06,295 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:23:07,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6424#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:23:07,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:23:07,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:23:07,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 6, 6] total 84 [2022-11-22 01:23:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758087851] [2022-11-22 01:23:07,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:23:07,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-22 01:23:07,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-22 01:23:07,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3212, Invalid=4978, Unknown=0, NotChecked=0, Total=8190 [2022-11-22 01:23:07,027 INFO L87 Difference]: Start difference. First operand 156 states and 195 transitions. Second operand has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 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) [2022-11-22 01:23:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:36,920 INFO L93 Difference]: Finished difference Result 4022 states and 6120 transitions. [2022-11-22 01:23:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-22 01:23:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 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 154 [2022-11-22 01:23:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:36,937 INFO L225 Difference]: With dead ends: 4022 [2022-11-22 01:23:36,937 INFO L226 Difference]: Without dead ends: 3867 [2022-11-22 01:23:36,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74532 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=45627, Invalid=168279, Unknown=0, NotChecked=0, Total=213906 [2022-11-22 01:23:36,965 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2007 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 2278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2007 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2278 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:36,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2007 Valid, 76 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2278 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 01:23:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2022-11-22 01:23:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 387. [2022-11-22 01:23:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5932642487046633) internal successors, (615), 386 states have internal predecessors, (615), 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) [2022-11-22 01:23:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 615 transitions. [2022-11-22 01:23:37,341 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 615 transitions. Word has length 154 [2022-11-22 01:23:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:37,341 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 615 transitions. [2022-11-22 01:23:37,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 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) [2022-11-22 01:23:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 615 transitions. [2022-11-22 01:23:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-11-22 01:23:37,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:37,347 INFO L195 NwaCegarLoop]: trace histogram [151, 76, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:23:37,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:37,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 01:23:37,555 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:37,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1046550603, now seen corresponding path program 9 times [2022-11-22 01:23:37,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:37,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597481779] [2022-11-22 01:23:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:37,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 28275 trivial. 0 not checked. [2022-11-22 01:23:45,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597481779] [2022-11-22 01:23:45,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597481779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392077065] [2022-11-22 01:23:45,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:23:45,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:45,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:45,160 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:45,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:23:45,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:23:45,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:23:45,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 2023 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-22 01:23:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 28045 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2022-11-22 01:23:46,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:23:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 28045 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2022-11-22 01:23:53,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392077065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:23:53,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282093015] [2022-11-22 01:23:53,650 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:23:53,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:23:53,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:23:53,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:23:53,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:23:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:53,683 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:23:53,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:23:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:53,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:23:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:53,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-22 01:23:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:53,766 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:23:53,767 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 202 treesize of output 190 [2022-11-22 01:23:53,806 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 [2022-11-22 01:23:53,911 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:23:54,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18362#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:23:54,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:23:54,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:23:54,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 79, 79] total 156 [2022-11-22 01:23:54,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347193096] [2022-11-22 01:23:54,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:23:54,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-11-22 01:23:54,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:54,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-11-22 01:23:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11972, Invalid=14434, Unknown=0, NotChecked=0, Total=26406 [2022-11-22 01:23:54,617 INFO L87 Difference]: Start difference. First operand 387 states and 615 transitions. Second operand has 156 states, 156 states have (on average 3.4871794871794872) internal successors, (544), 156 states have internal predecessors, (544), 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) [2022-11-22 01:24:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:24:41,101 INFO L93 Difference]: Finished difference Result 34751 states and 60711 transitions. [2022-11-22 01:24:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2022-11-22 01:24:41,102 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 3.4871794871794872) internal successors, (544), 156 states have internal predecessors, (544), 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 385 [2022-11-22 01:24:41,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:24:41,241 INFO L225 Difference]: With dead ends: 34751 [2022-11-22 01:24:41,241 INFO L226 Difference]: Without dead ends: 34365 [2022-11-22 01:24:41,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1308 GetRequests, 1070 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7751 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=18132, Invalid=39228, Unknown=0, NotChecked=0, Total=57360 [2022-11-22 01:24:41,264 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 587 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:24:41,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 59 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:24:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34365 states. [2022-11-22 01:24:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34365 to 618. [2022-11-22 01:24:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.4959481361426257) internal successors, (923), 617 states have internal predecessors, (923), 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) [2022-11-22 01:24:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 923 transitions. [2022-11-22 01:24:45,012 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 923 transitions. Word has length 385 [2022-11-22 01:24:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:24:45,013 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 923 transitions. [2022-11-22 01:24:45,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 3.4871794871794872) internal successors, (544), 156 states have internal predecessors, (544), 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) [2022-11-22 01:24:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 923 transitions. [2022-11-22 01:24:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-11-22 01:24:45,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:24:45,028 INFO L195 NwaCegarLoop]: trace histogram [153, 152, 152, 151, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:24:45,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 01:24:45,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:24:45,237 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:24:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:24:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1410044638, now seen corresponding path program 10 times [2022-11-22 01:24:45,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:24:45,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294494525] [2022-11-22 01:24:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:45,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:24:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-11-22 01:25:06,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:06,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294494525] [2022-11-22 01:25:06,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294494525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:06,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650977368] [2022-11-22 01:25:06,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:25:06,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:06,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:06,488 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:06,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:25:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 3255 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-22 01:25:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-11-22 01:25:07,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-11-22 01:25:35,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650977368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930066096] [2022-11-22 01:25:35,758 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:25:35,758 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:35,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:35,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:35,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:35,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:35,783 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:25:35,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:25:35,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:35,807 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:35,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:25:35,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:35,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:25:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:35,888 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:25:35,889 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 192 treesize of output 191 [2022-11-22 01:25:35,965 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 [2022-11-22 01:25:36,079 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:37,144 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93168#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:25:37,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:37,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:25:37,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155, 155] total 310 [2022-11-22 01:25:37,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979760662] [2022-11-22 01:25:37,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:37,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 311 states [2022-11-22 01:25:37,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:37,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 311 interpolants. [2022-11-22 01:25:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48240, Invalid=52566, Unknown=0, NotChecked=0, Total=100806 [2022-11-22 01:25:37,164 INFO L87 Difference]: Start difference. First operand 618 states and 923 transitions. Second operand has 311 states, 311 states have (on average 1.0321543408360128) internal successors, (321), 310 states have internal predecessors, (321), 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) [2022-11-22 01:29:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:37,195 INFO L93 Difference]: Finished difference Result 59544 states and 103441 transitions. [2022-11-22 01:29:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 310 states. [2022-11-22 01:29:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 311 states, 311 states have (on average 1.0321543408360128) internal successors, (321), 310 states have internal predecessors, (321), 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 616 [2022-11-22 01:29:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:37,339 INFO L225 Difference]: With dead ends: 59544 [2022-11-22 01:29:37,339 INFO L226 Difference]: Without dead ends: 59081 [2022-11-22 01:29:37,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2001 GetRequests, 1685 SyntacticMatches, 0 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3846 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=48240, Invalid=52566, Unknown=0, NotChecked=0, Total=100806 [2022-11-22 01:29:37,369 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10941 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 1909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10941 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1909 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:37,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10941 Valid, 978 Invalid, 3640 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1909 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-22 01:29:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59081 states. [2022-11-22 01:29:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59081 to 773. [2022-11-22 01:29:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.3963730569948187) internal successors, (1078), 772 states have internal predecessors, (1078), 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) [2022-11-22 01:29:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1078 transitions. [2022-11-22 01:29:41,789 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1078 transitions. Word has length 616 [2022-11-22 01:29:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:41,789 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1078 transitions. [2022-11-22 01:29:41,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 311 states, 311 states have (on average 1.0321543408360128) internal successors, (321), 310 states have internal predecessors, (321), 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) [2022-11-22 01:29:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1078 transitions. [2022-11-22 01:29:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-11-22 01:29:41,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:41,815 INFO L195 NwaCegarLoop]: trace histogram [308, 152, 152, 151, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:29:41,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:42,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:42,025 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:42,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash 847092571, now seen corresponding path program 11 times [2022-11-22 01:29:42,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:42,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649811201] [2022-11-22 01:29:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:42,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 104967 backedges. 0 proven. 47586 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-11-22 01:30:57,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:57,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649811201] [2022-11-22 01:30:57,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649811201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:30:57,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868808908] [2022-11-22 01:30:57,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:30:57,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:57,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:57,144 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:57,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437dda27-212c-4d31-b1cf-97572b57a19c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:30:57,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 01:30:57,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:30:57,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:30:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 104967 backedges. 1642 proven. 10 refuted. 0 times theorem prover too weak. 103315 trivial. 0 not checked. [2022-11-22 01:30:58,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:31:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 104967 backedges. 1642 proven. 10 refuted. 0 times theorem prover too weak. 103315 trivial. 0 not checked. [2022-11-22 01:31:00,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868808908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:31:00,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109145833] [2022-11-22 01:31:00,329 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:31:00,330 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:31:00,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:31:00,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:31:00,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:31:00,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:00,350 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:31:00,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:31:00,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:00,371 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:31:00,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:31:00,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:00,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-22 01:31:00,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:00,444 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:31:00,444 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 202 treesize of output 190 [2022-11-22 01:31:00,483 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 [2022-11-22 01:31:00,577 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:31:02,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '217961#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:31:02,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:31:02,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:31:02,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [310, 9, 9] total 324 [2022-11-22 01:31:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061332090] [2022-11-22 01:31:02,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:31:02,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 324 states [2022-11-22 01:31:02,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:31:02,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 324 interpolants. [2022-11-22 01:31:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50174, Invalid=59056, Unknown=0, NotChecked=0, Total=109230 [2022-11-22 01:31:02,534 INFO L87 Difference]: Start difference. First operand 773 states and 1078 transitions. Second operand has 324 states, 324 states have (on average 1.0493827160493827) internal successors, (340), 324 states have internal predecessors, (340), 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)