./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7 --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 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:30:50,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:30:50,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:30:50,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:30:50,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:30:50,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:30:50,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:30:50,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:30:50,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:30:50,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:30:50,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:30:50,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:30:50,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:30:50,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:30:50,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:30:50,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:30:50,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:30:50,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:30:50,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:30:50,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:30:50,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:30:50,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:30:50,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:30:50,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:30:50,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:30:50,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:30:50,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:30:50,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:30:50,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:30:50,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:30:50,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:30:50,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:30:50,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:30:50,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:30:50,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:30:50,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:30:50,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:30:50,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:30:50,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:30:50,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:30:50,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:30:50,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:30:50,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:30:50,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:30:50,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:30:50,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:30:50,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:30:50,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:30:50,355 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:30:50,355 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:30:50,355 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:30:50,355 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:30:50,357 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:30:50,357 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:30:50,357 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:30:50,357 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:30:50,357 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:30:50,358 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:30:50,358 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:30:50,358 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:30:50,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:30:50,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:30:50,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:30:50,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:30:50,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:30:50,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:30:50,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:30:50,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:30:50,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:30:50,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:30:50,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:30:50,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:30:50,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:30:50,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:30:50,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:30:50,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:30:50,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:30:50,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:30:50,365 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:30:50,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:30:50,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:30:50,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:30:50,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:30:50,366 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac [2021-11-25 19:30:50,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:30:50,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:30:50,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:30:50,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:30:50,679 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:30:50,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2021-11-25 19:30:50,767 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/data/8cf5fb397/115bd65e6a964d27a05f72d9015e2225/FLAG2eacca034 [2021-11-25 19:30:51,206 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:30:51,207 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2021-11-25 19:30:51,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/data/8cf5fb397/115bd65e6a964d27a05f72d9015e2225/FLAG2eacca034 [2021-11-25 19:30:51,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/data/8cf5fb397/115bd65e6a964d27a05f72d9015e2225 [2021-11-25 19:30:51,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:30:51,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:30:51,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:30:51,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:30:51,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:30:51,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:51,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23de668f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51, skipping insertion in model container [2021-11-25 19:30:51,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:51,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:30:51,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:30:51,819 WARN L230 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_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2021-11-25 19:30:51,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:30:51,855 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:30:51,878 WARN L230 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_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2021-11-25 19:30:51,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:30:51,922 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:30:51,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51 WrapperNode [2021-11-25 19:30:51,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:30:51,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:30:51,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:30:51,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:30:51,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:51,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:51,969 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2021-11-25 19:30:51,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:30:51,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:30:51,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:30:51,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:30:51,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:51,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:51,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:51,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:52,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:52,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:52,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:52,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:30:52,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:30:52,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:30:52,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:30:52,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (1/1) ... [2021-11-25 19:30:52,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:30:52,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:52,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:30:52,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:30:52,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:30:52,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:30:52,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:30:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:30:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:30:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:30:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:30:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:30:52,212 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:30:52,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:30:52,342 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:30:52,380 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:30:52,380 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:30:52,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:30:52 BoogieIcfgContainer [2021-11-25 19:30:52,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:30:52,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:30:52,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:30:52,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:30:52,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:30:51" (1/3) ... [2021-11-25 19:30:52,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8c140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:30:52, skipping insertion in model container [2021-11-25 19:30:52,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:51" (2/3) ... [2021-11-25 19:30:52,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8c140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:30:52, skipping insertion in model container [2021-11-25 19:30:52,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:30:52" (3/3) ... [2021-11-25 19:30:52,392 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2021-11-25 19:30:52,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:30:52,405 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:30:52,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:30:52,462 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:30:52,462 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:30:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:30:52,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:52,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:30:52,483 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:30:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:52,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1387171958, now seen corresponding path program 1 times [2021-11-25 19:30:52,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:52,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977773791] [2021-11-25 19:30:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:52,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:52,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:52,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977773791] [2021-11-25 19:30:52,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977773791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:52,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:52,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:30:52,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49827297] [2021-11-25 19:30:52,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:52,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:30:52,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:30:52,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:30:52,795 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:52,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:52,879 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-11-25 19:30:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:30:52,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:30:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:52,889 INFO L225 Difference]: With dead ends: 17 [2021-11-25 19:30:52,889 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 19:30:52,892 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:30:52,907 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:52,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:30:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 19:30:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 19:30:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-11-25 19:30:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-25 19:30:52,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2021-11-25 19:30:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:52,957 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-25 19:30:52,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-25 19:30:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:30:52,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:52,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:52,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:30:52,959 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:30:52,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash -110753083, now seen corresponding path program 1 times [2021-11-25 19:30:52,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:52,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998302289] [2021-11-25 19:30:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:52,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:30:53,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:53,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998302289] [2021-11-25 19:30:53,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998302289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:53,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:53,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:30:53,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087706441] [2021-11-25 19:30:53,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:53,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:30:53,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:30:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:30:53,065 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:53,109 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-11-25 19:30:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:30:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 19:30:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:53,114 INFO L225 Difference]: With dead ends: 15 [2021-11-25 19:30:53,114 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 19:30:53,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:30:53,117 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:53,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 19:30:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 19:30:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-25 19:30:53,122 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-25 19:30:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:53,122 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-25 19:30:53,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-25 19:30:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:30:53,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:53,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:53,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:30:53,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:30:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash 849702428, now seen corresponding path program 1 times [2021-11-25 19:30:53,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:53,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417423958] [2021-11-25 19:30:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:53,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:30:53,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417423958] [2021-11-25 19:30:53,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417423958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998564672] [2021-11-25 19:30:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:53,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:53,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:53,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:53,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:30:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:30:53,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:30:53,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:30:53,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998564672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:53,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [123726439] [2021-11-25 19:30:53,606 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:30:53,607 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:53,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:53,619 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:53,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:53,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:53,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:53,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:53,871 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-25 19:30:53,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-25 19:30:53,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:53,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:53,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:54,065 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:30:54,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 19:30:54,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:54,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:54,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-25 19:30:54,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:54,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:54,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:54,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:54,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:54,624 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-25 19:30:54,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 428 treesize of output 426 [2021-11-25 19:30:55,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:55,639 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-25 19:30:55,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-25 19:30:55,716 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-25 19:30:55,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-25 19:30:55,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:55,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:55,850 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:30:55,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:30:55,962 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:56,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '141#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 19:30:56,223 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:56,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:56,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-25 19:30:56,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572566043] [2021-11-25 19:30:56,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:56,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:30:56,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:30:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:30:56,227 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:56,253 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-25 19:30:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:30:56,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 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 8 [2021-11-25 19:30:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:56,254 INFO L225 Difference]: With dead ends: 20 [2021-11-25 19:30:56,255 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 19:30:56,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:30:56,257 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:56,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 19:30:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 19:30:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-25 19:30:56,262 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-11-25 19:30:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:56,263 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-25 19:30:56,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-25 19:30:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:30:56,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:56,264 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:56,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:56,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:56,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:30:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash 193659703, now seen corresponding path program 2 times [2021-11-25 19:30:56,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130189948] [2021-11-25 19:30:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:56,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:30:56,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:56,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130189948] [2021-11-25 19:30:56,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130189948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:56,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076254347] [2021-11-25 19:30:56,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:30:56,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:56,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:56,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:56,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:30:56,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:30:56,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:30:56,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:30:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:30:56,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:30:56,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076254347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:56,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743287259] [2021-11-25 19:30:56,812 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:30:56,813 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:56,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:56,819 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:56,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:56,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:56,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:56,935 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-25 19:30:56,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-25 19:30:56,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:56,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:56,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:57,080 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:30:57,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 19:30:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:57,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-25 19:30:57,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:57,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:57,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:57,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:57,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:57,396 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-25 19:30:57,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 428 treesize of output 426 [2021-11-25 19:30:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:57,884 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-25 19:30:57,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-25 19:30:57,942 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-25 19:30:57,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-25 19:30:57,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:57,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:58,040 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:30:58,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:30:58,118 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:58,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '270#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 19:30:58,379 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:58,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:58,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2021-11-25 19:30:58,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716616973] [2021-11-25 19:30:58,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:58,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:30:58,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:30:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:30:58,382 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-11-25 19:30:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:58,548 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-11-25 19:30:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:30:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 11 [2021-11-25 19:30:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:58,550 INFO L225 Difference]: With dead ends: 55 [2021-11-25 19:30:58,551 INFO L226 Difference]: Without dead ends: 48 [2021-11-25 19:30:58,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:30:58,552 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:58,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 27 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:30:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-25 19:30:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 22. [2021-11-25 19:30:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-25 19:30:58,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2021-11-25 19:30:58,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:58,560 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-25 19:30:58,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-11-25 19:30:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-25 19:30:58,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:30:58,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:58,562 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:58,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:58,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:58,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:30:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1909590116, now seen corresponding path program 3 times [2021-11-25 19:30:58,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:58,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670061403] [2021-11-25 19:30:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:58,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 19:30:58,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:58,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670061403] [2021-11-25 19:30:58,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670061403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026380740] [2021-11-25 19:30:58,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:30:58,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:58,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:58,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:58,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:30:59,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:30:59,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:30:59,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:30:59,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 19:30:59,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 19:30:59,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026380740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:59,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2041290823] [2021-11-25 19:30:59,458 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:30:59,459 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:59,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:59,459 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:59,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:59,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,614 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:30:59,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 19:30:59,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-25 19:30:59,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-25 19:30:59,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:59,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:59,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:59,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:59,960 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-25 19:30:59,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 427 treesize of output 425 [2021-11-25 19:31:00,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:00,550 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-25 19:31:00,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-25 19:31:00,606 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-25 19:31:00,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-25 19:31:00,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:00,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:00,703 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:31:00,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:31:00,786 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:31:01,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '546#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 19:31:01,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:31:01,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:31:01,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2021-11-25 19:31:01,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412870382] [2021-11-25 19:31:01,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:31:01,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 19:31:01,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 19:31:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2021-11-25 19:31:01,135 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:01,551 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-11-25 19:31:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:31:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 19:31:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:01,555 INFO L225 Difference]: With dead ends: 124 [2021-11-25 19:31:01,556 INFO L226 Difference]: Without dead ends: 111 [2021-11-25 19:31:01,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 19:31:01,560 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 252 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:01,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 60 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:31:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-25 19:31:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 40. [2021-11-25 19:31:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-25 19:31:01,576 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2021-11-25 19:31:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:01,576 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-25 19:31:01,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-25 19:31:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:31:01,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:01,581 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:01,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:31:01,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:01,796 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash 726013834, now seen corresponding path program 4 times [2021-11-25 19:31:01,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:01,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395404543] [2021-11-25 19:31:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:01,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-25 19:31:02,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395404543] [2021-11-25 19:31:02,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395404543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107906401] [2021-11-25 19:31:02,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:31:02,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:02,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:02,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:02,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:31:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:31:02,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:31:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-25 19:31:02,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:31:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-25 19:31:03,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107906401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:31:03,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2047216921] [2021-11-25 19:31:03,317 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:31:03,317 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:31:03,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:31:03,318 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:31:03,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:31:03,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,430 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-25 19:31:03,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-25 19:31:03,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,543 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:31:03,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 19:31:03,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-11-25 19:31:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:03,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:03,820 INFO L354 Elim1Store]: treesize reduction 144, result has 12.2 percent of original size [2021-11-25 19:31:03,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 436 treesize of output 422 [2021-11-25 19:31:03,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:03,931 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-25 19:31:03,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-25 19:31:03,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:03,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:03,986 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:31:03,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:31:04,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:04,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:04,078 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:31:04,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:31:04,121 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:31:04,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1099#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 19:31:04,298 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:31:04,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:31:04,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-11-25 19:31:04,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085984319] [2021-11-25 19:31:04,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:31:04,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-25 19:31:04,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-25 19:31:04,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 19:31:04,302 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:04,421 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-11-25 19:31:04,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-25 19:31:04,422 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-25 19:31:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:04,426 INFO L225 Difference]: With dead ends: 80 [2021-11-25 19:31:04,427 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 19:31:04,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 19:31:04,431 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:04,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:31:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 19:31:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-25 19:31:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-11-25 19:31:04,454 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 38 [2021-11-25 19:31:04,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:04,454 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-11-25 19:31:04,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-11-25 19:31:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:31:04,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:04,460 INFO L514 BasicCegarLoop]: trace histogram [34, 16, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:04,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:31:04,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:31:04,684 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1878074902, now seen corresponding path program 5 times [2021-11-25 19:31:04,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:04,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81066933] [2021-11-25 19:31:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:04,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-25 19:31:05,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:05,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81066933] [2021-11-25 19:31:05,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81066933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:05,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287239662] [2021-11-25 19:31:05,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:31:05,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:05,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:05,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:05,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:31:12,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-25 19:31:12,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:31:12,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:31:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:31:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-25 19:31:13,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:31:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-25 19:31:13,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287239662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:31:13,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755054788] [2021-11-25 19:31:13,899 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:31:13,899 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:31:13,899 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:31:13,900 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:31:13,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:31:13,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:13,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:14,014 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-25 19:31:14,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-25 19:31:14,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:14,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:14,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:14,148 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:31:14,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 19:31:14,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:14,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:14,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-25 19:31:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:14,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:31:14,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:14,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:14,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:14,462 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-25 19:31:14,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 428 treesize of output 426 [2021-11-25 19:31:14,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:14,762 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-25 19:31:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-25 19:31:14,815 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-25 19:31:14,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-25 19:31:14,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:14,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:31:14,907 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:31:14,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:31:14,983 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:31:15,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1768#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 19:31:15,977 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:31:15,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:31:15,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19, 19] total 72 [2021-11-25 19:31:15,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343254166] [2021-11-25 19:31:15,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:31:15,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-25 19:31:15,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-25 19:31:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2629, Invalid=3223, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 19:31:15,983 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:18,201 INFO L93 Difference]: Finished difference Result 385 states and 442 transitions. [2021-11-25 19:31:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-25 19:31:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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 56 [2021-11-25 19:31:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:18,205 INFO L225 Difference]: With dead ends: 385 [2021-11-25 19:31:18,205 INFO L226 Difference]: Without dead ends: 363 [2021-11-25 19:31:18,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 110 SyntacticMatches, 17 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5666 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4729, Invalid=7703, Unknown=0, NotChecked=0, Total=12432 [2021-11-25 19:31:18,212 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 978 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:18,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 177 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:31:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-25 19:31:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 112. [2021-11-25 19:31:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-11-25 19:31:18,245 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 56 [2021-11-25 19:31:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:18,245 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-11-25 19:31:18,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-11-25 19:31:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 19:31:18,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:18,255 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:18,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:31:18,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:18,460 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:18,461 INFO L85 PathProgramCache]: Analyzing trace with hash -98618998, now seen corresponding path program 6 times [2021-11-25 19:31:18,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:18,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290037513] [2021-11-25 19:31:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:18,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-25 19:31:20,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:20,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290037513] [2021-11-25 19:31:20,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290037513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:20,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151853033] [2021-11-25 19:31:20,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:31:20,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:20,162 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:20,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:33:11,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:33:11,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:33:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-25 19:33:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:33:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-25 19:33:13,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:33:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-25 19:33:16,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151853033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:33:16,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49240824] [2021-11-25 19:33:16,325 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:33:16,325 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:33:16,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:33:16,326 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:33:16,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:33:16,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,412 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-25 19:33:16,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-25 19:33:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,532 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:33:16,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 19:33:16,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-11-25 19:33:16,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:16,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:16,735 INFO L354 Elim1Store]: treesize reduction 144, result has 12.2 percent of original size [2021-11-25 19:33:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 436 treesize of output 422 [2021-11-25 19:33:16,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:16,840 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-25 19:33:16,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-25 19:33:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:16,886 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:33:16,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:33:16,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:16,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:16,950 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:33:16,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:33:16,986 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:33:17,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3439#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 19:33:17,146 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:33:17,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:33:17,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 162 [2021-11-25 19:33:17,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102926145] [2021-11-25 19:33:17,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:33:17,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-11-25 19:33:17,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-11-25 19:33:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12160, Invalid=15562, Unknown=0, NotChecked=0, Total=27722 [2021-11-25 19:33:17,159 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:24,901 INFO L93 Difference]: Finished difference Result 799 states and 910 transitions. [2021-11-25 19:33:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-25 19:33:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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 110 [2021-11-25 19:33:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:24,906 INFO L225 Difference]: With dead ends: 799 [2021-11-25 19:33:24,906 INFO L226 Difference]: Without dead ends: 741 [2021-11-25 19:33:24,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18434 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=18202, Invalid=29978, Unknown=0, NotChecked=0, Total=48180 [2021-11-25 19:33:24,915 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2154 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1386 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:24,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2154 Valid, 408 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1386 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 19:33:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-11-25 19:33:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 220. [2021-11-25 19:33:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2021-11-25 19:33:24,939 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 110 [2021-11-25 19:33:24,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:24,939 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2021-11-25 19:33:24,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2021-11-25 19:33:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-25 19:33:24,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:24,944 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1] [2021-11-25 19:33:24,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:33:25,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:33:25,147 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:25,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1978675062, now seen corresponding path program 7 times [2021-11-25 19:33:25,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:25,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699290333] [2021-11-25 19:33:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:25,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-25 19:33:30,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:33:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699290333] [2021-11-25 19:33:30,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699290333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:33:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738595451] [2021-11-25 19:33:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:33:30,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:33:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:33:30,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:33:30,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:33:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:30,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 3157 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-25 19:33:30,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:33:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-25 19:33:36,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:33:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-25 19:33:48,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738595451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:33:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237770133] [2021-11-25 19:33:48,410 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:33:48,410 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:33:48,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:33:48,411 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:33:48,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:33:48,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,513 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:33:48,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 19:33:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-25 19:33:48,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-25 19:33:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:48,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:48,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:48,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:48,751 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-25 19:33:48,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 427 treesize of output 425 [2021-11-25 19:33:49,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:49,114 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-25 19:33:49,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-25 19:33:49,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:49,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:49,161 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:33:49,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:33:49,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:49,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:49,287 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-25 19:33:49,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 19:33:49,321 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:33:49,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6782#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 19:33:49,509 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:33:49,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:33:49,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2021-11-25 19:33:49,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418875449] [2021-11-25 19:33:49,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:33:49,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 323 states [2021-11-25 19:33:49,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 323 interpolants. [2021-11-25 19:33:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2021-11-25 19:33:49,531 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:50,490 INFO L93 Difference]: Finished difference Result 440 states and 551 transitions. [2021-11-25 19:33:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-11-25 19:33:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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 218 [2021-11-25 19:33:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:50,494 INFO L225 Difference]: With dead ends: 440 [2021-11-25 19:33:50,494 INFO L226 Difference]: Without dead ends: 328 [2021-11-25 19:33:50,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47918 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2021-11-25 19:33:50,501 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:50,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:33:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-25 19:33:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2021-11-25 19:33:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0091743119266054) internal successors, (330), 327 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2021-11-25 19:33:50,528 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 218 [2021-11-25 19:33:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:50,528 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2021-11-25 19:33:50,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2021-11-25 19:33:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-25 19:33:50,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:50,535 INFO L514 BasicCegarLoop]: trace histogram [214, 106, 1, 1, 1, 1, 1, 1] [2021-11-25 19:33:50,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 19:33:50,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 19:33:50,764 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash 835196618, now seen corresponding path program 8 times [2021-11-25 19:33:50,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:50,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495845511] [2021-11-25 19:33:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:50,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 28676 backedges. 0 proven. 23005 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-25 19:34:08,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:34:08,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495845511] [2021-11-25 19:34:08,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495845511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:34:08,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874156584] [2021-11-25 19:34:08,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:34:08,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:08,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:08,600 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:34:08,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ab36b5-35a3-48c0-aece-d9194aaf10aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process