./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2if.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_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/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_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/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_2bb80646-99c2-4c80-8e59-e1d657264cfa/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 42b59db67e4ff104bf70a3f31bfda20f06e9930727bb99d5ddebd47ecfc54cb7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:02:37,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:02:37,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:02:37,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:02:37,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:02:37,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:02:37,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:02:37,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:02:37,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:02:37,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:02:37,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:02:37,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:02:37,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:02:37,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:02:37,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:02:37,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:02:37,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:02:37,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:02:37,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:02:37,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:02:37,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:02:37,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:02:37,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:02:37,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:02:37,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:02:37,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:02:37,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:02:37,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:02:37,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:02:37,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:02:37,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:02:37,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:02:37,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:02:37,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:02:37,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:02:37,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:02:37,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:02:37,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:02:37,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:02:37,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:02:37,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:02:37,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:02:37,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:02:37,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:02:37,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:02:37,394 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:02:37,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:02:37,396 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:02:37,396 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:02:37,396 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:02:37,397 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:02:37,397 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:02:37,397 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:02:37,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:02:37,398 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:02:37,398 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:02:37,399 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:02:37,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:02:37,399 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:02:37,400 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:02:37,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:02:37,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:02:37,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:02:37,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:02:37,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:02:37,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:02:37,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:02:37,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:02:37,403 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:02:37,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:02:37,410 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:02:37,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:02:37,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:02:37,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:02:37,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:02:37,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:02:37,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:02:37,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:02:37,413 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:02:37,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:02:37,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:02:37,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:02:37,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:02:37,414 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_2bb80646-99c2-4c80-8e59-e1d657264cfa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42b59db67e4ff104bf70a3f31bfda20f06e9930727bb99d5ddebd47ecfc54cb7 [2021-11-25 18:02:37,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:02:37,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:02:37,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:02:37,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:02:37,735 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:02:37,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/s2if.c [2021-11-25 18:02:37,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/data/f422941cc/dc69150245334120ac009566d6a7cb09/FLAG34a3c2dc0 [2021-11-25 18:02:38,337 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:02:38,338 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/sv-benchmarks/c/array-fpi/s2if.c [2021-11-25 18:02:38,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/data/f422941cc/dc69150245334120ac009566d6a7cb09/FLAG34a3c2dc0 [2021-11-25 18:02:38,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/data/f422941cc/dc69150245334120ac009566d6a7cb09 [2021-11-25 18:02:38,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:02:38,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:02:38,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:02:38,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:02:38,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:02:38,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:38,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e1484d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38, skipping insertion in model container [2021-11-25 18:02:38,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:38,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:02:38,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:02:38,920 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_2bb80646-99c2-4c80-8e59-e1d657264cfa/sv-benchmarks/c/array-fpi/s2if.c[587,600] [2021-11-25 18:02:38,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:02:38,943 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:02:38,957 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_2bb80646-99c2-4c80-8e59-e1d657264cfa/sv-benchmarks/c/array-fpi/s2if.c[587,600] [2021-11-25 18:02:38,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:02:38,977 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:02:38,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38 WrapperNode [2021-11-25 18:02:38,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:02:38,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:02:38,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:02:38,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:02:38,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:38,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:39,014 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-11-25 18:02:39,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:02:39,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:02:39,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:02:39,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:02:39,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:39,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:39,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:39,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:39,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:39,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:39,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:39,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:02:39,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:02:39,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:02:39,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:02:39,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (1/1) ... [2021-11-25 18:02:39,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:02:39,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:39,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:02:39,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:02:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:02:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:02:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:02:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:02:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:02:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:02:39,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:02:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:02:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:02:39,217 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:02:39,219 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:02:39,389 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:02:39,466 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:02:39,474 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:02:39,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:39 BoogieIcfgContainer [2021-11-25 18:02:39,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:02:39,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:02:39,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:02:39,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:02:39,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:02:38" (1/3) ... [2021-11-25 18:02:39,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77066ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:39, skipping insertion in model container [2021-11-25 18:02:39,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:38" (2/3) ... [2021-11-25 18:02:39,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77066ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:39, skipping insertion in model container [2021-11-25 18:02:39,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:39" (3/3) ... [2021-11-25 18:02:39,502 INFO L111 eAbstractionObserver]: Analyzing ICFG s2if.c [2021-11-25 18:02:39,506 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:02:39,517 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:02:39,582 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:02:39,589 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 18:02:39,590 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:02:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 18:02:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:02:39,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:39,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:02:39,622 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:39,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2021-11-25 18:02:39,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:39,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694837523] [2021-11-25 18:02:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:39,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:39,821 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 18:02:39,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:39,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694837523] [2021-11-25 18:02:39,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694837523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:39,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:39,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:02:39,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185975223] [2021-11-25 18:02:39,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:39,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:02:39,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:02:39,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:02:39,874 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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), 3 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 18:02:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:39,926 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-25 18:02:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:02:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 18:02:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:39,938 INFO L225 Difference]: With dead ends: 18 [2021-11-25 18:02:39,938 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 18:02:39,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 18:02:39,949 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:39,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:02:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 18:02:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 18:02:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 18:02:39,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-25 18:02:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:39,978 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 18:02:39,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 18:02:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 18:02:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:02:39,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:39,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:39,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:02:39,980 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:39,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2021-11-25 18:02:39,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:39,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267494413] [2021-11-25 18:02:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:39,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:40,050 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 18:02:40,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:40,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267494413] [2021-11-25 18:02:40,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267494413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:40,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:40,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:02:40,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961322011] [2021-11-25 18:02:40,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:40,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:02:40,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:02:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:02:40,055 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:40,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:40,077 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-25 18:02:40,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:02:40,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:02:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:40,078 INFO L225 Difference]: With dead ends: 12 [2021-11-25 18:02:40,078 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 18:02:40,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:02:40,080 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:40,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:02:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 18:02:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 18:02:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-25 18:02:40,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-25 18:02:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:40,085 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-25 18:02:40,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-25 18:02:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:02:40,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:40,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:40,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:02:40,087 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2021-11-25 18:02:40,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:40,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043491779] [2021-11-25 18:02:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:40,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:40,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:02:40,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821956177] [2021-11-25 18:02:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:40,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:40,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:40,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:40,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:02:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:40,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:02:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:40,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:02:40,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:02:40,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:02:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:02:40,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2021-11-25 18:02:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:40,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:40,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 18:02:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:40,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:40,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043491779] [2021-11-25 18:02:40,983 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:02:40,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821956177] [2021-11-25 18:02:40,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821956177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:02:40,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [802625147] [2021-11-25 18:02:41,013 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:02:41,014 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:02:41,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:02:41,025 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:02:41,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:02:41,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,184 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 18:02:41,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 18:02:41,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,305 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:02:41,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:02:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 18:02:41,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-25 18:02:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:41,776 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-25 18:02:41,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 430 treesize of output 419 [2021-11-25 18:02:41,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:02:42,023 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:02:42,023 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 18:02:42,109 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:02:42,110 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 18:02:42,213 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:42,214 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:02:42,325 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:42,326 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:02:42,380 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:02:42,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:02:42,792 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:02:42,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:02:42,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-25 18:02:42,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327367598] [2021-11-25 18:02:42,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:02:42,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:02:42,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:42,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:02:42,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:02:42,794 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 18:02:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:42,841 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-25 18:02:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:02:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 18:02:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:42,842 INFO L225 Difference]: With dead ends: 15 [2021-11-25 18:02:42,842 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 18:02:42,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:02:42,844 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:42,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-25 18:02:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 18:02:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-25 18:02:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 18:02:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-25 18:02:42,849 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-25 18:02:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:42,849 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-25 18:02:42,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 18:02:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-25 18:02:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:02:42,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:42,851 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:42,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:02:43,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:43,052 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2021-11-25 18:02:43,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:43,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100999179] [2021-11-25 18:02:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:43,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:43,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:02:43,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002694315] [2021-11-25 18:02:43,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:02:43,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:43,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:43,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:02:43,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:02:43,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:02:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:02:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:43,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:43,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:43,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100999179] [2021-11-25 18:02:43,244 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:02:43,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002694315] [2021-11-25 18:02:43,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002694315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:02:43,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19309785] [2021-11-25 18:02:43,248 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:02:43,248 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:02:43,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:02:43,249 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:02:43,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:02:43,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,352 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:02:43,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:02:43,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 18:02:43,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:02:43,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 18:02:43,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:43,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:43,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:43,687 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 18:02:43,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 18:02:43,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:02:43,945 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:02:43,946 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 18:02:44,001 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:02:44,002 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 18:02:44,081 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:44,082 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:02:44,150 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:44,150 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:02:44,272 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:02:44,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '236#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:02:44,621 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:02:44,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:02:44,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 18:02:44,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039345960] [2021-11-25 18:02:44,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:02:44,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:02:44,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:02:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:02:44,623 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) 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 18:02:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:44,697 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-25 18:02:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:02:44,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) 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) Word has length 9 [2021-11-25 18:02:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:44,699 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:02:44,699 INFO L226 Difference]: Without dead ends: 14 [2021-11-25 18:02:44,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:02:44,700 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:44,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:02:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-25 18:02:44,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2021-11-25 18:02:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 18:02:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-25 18:02:44,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-11-25 18:02:44,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:44,704 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-25 18:02:44,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) 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 18:02:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-25 18:02:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:02:44,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:44,705 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:44,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:02:44,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:44,906 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2021-11-25 18:02:44,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:44,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139926135] [2021-11-25 18:02:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:44,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:44,926 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:02:44,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943186389] [2021-11-25 18:02:44,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:02:44,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:44,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:44,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:44,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:02:44,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:02:44,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:02:45,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:02:45,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:45,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:45,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:45,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139926135] [2021-11-25 18:02:45,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:02:45,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943186389] [2021-11-25 18:02:45,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943186389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:02:45,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096251892] [2021-11-25 18:02:45,084 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:02:45,084 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:02:45,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:02:45,085 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:02:45,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:02:45,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,136 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 18:02:45,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 18:02:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,210 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 18:02:45,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 18:02:45,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,302 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:02:45,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:02:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:02:45,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-25 18:02:45,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:02:45,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:45,455 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:02:45,460 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 18:02:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:45,528 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:02:45,529 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 18:02:45,600 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:45,601 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:02:45,655 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:45,655 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:02:45,758 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:02:46,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '347#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:02:46,035 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:02:46,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:02:46,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 18:02:46,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932516845] [2021-11-25 18:02:46,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:02:46,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:02:46,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:46,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:02:46,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:02:46,037 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 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 18:02:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:46,124 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-25 18:02:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:02:46,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 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) Word has length 9 [2021-11-25 18:02:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:46,125 INFO L225 Difference]: With dead ends: 14 [2021-11-25 18:02:46,125 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 18:02:46,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:02:46,126 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:46,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:02:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 18:02:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 18:02:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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 18:02:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 18:02:46,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-25 18:02:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:46,130 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 18:02:46,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 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 18:02:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 18:02:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:02:46,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:46,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:46,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:02:46,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:46,344 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2021-11-25 18:02:46,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:46,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321202494] [2021-11-25 18:02:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:46,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:46,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:02:46,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626346054] [2021-11-25 18:02:46,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:02:46,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:46,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:46,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:46,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:02:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 18:02:46,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:46,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:02:46,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:02:46,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-25 18:02:46,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:46,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:02:46,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:46,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-25 18:02:46,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-25 18:02:46,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2021-11-25 18:02:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:46,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:46,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 18:02:47,016 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5)))) (let ((.cse0 (= .cse2 2))) (and (or (and (forall ((v_ArrVal_163 (Array Int Int))) (= (* 2 c_~N~0) (+ (select v_ArrVal_163 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_163) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4))))) (forall ((v_ArrVal_163 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_163) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4))))) .cse0) (or (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5 4)))) (and (= 2 .cse1) (= (* 2 c_~N~0) (+ .cse2 .cse3 .cse1)))))) (not .cse0)))))) is different from false [2021-11-25 18:02:47,335 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (let ((.cse5 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 2))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse1 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (and (= (* 2 ~N~0) (+ .cse0 .cse1 .cse2)) (= 2 .cse2) (or (forall ((v_ArrVal_163 (Array Int Int))) (= (* 2 ~N~0) (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 2)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_163) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select v_ArrVal_163 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (= 2 .cse1)))))))) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0))) is different from false [2021-11-25 18:02:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-25 18:02:47,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:47,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321202494] [2021-11-25 18:02:47,714 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:02:47,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626346054] [2021-11-25 18:02:47,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626346054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:02:47,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57780092] [2021-11-25 18:02:47,717 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:02:47,718 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:02:47,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:02:47,718 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:02:47,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:02:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,823 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:02:47,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:02:47,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:02:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 18:02:47,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 18:02:48,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:48,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:48,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:48,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:48,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:48,118 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 18:02:48,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 18:02:48,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:02:48,306 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:02:48,307 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 18:02:48,356 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:02:48,356 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 18:02:48,441 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:48,441 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:02:48,493 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:48,494 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:02:48,576 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:02:49,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '465#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:02:49,013 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:02:49,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:02:49,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-25 18:02:49,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027795801] [2021-11-25 18:02:49,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:02:49,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:02:49,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:49,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:02:49,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=227, Unknown=5, NotChecked=62, Total=342 [2021-11-25 18:02:49,016 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:49,077 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-25 18:02:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:02:49,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:02:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:49,078 INFO L225 Difference]: With dead ends: 18 [2021-11-25 18:02:49,078 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 18:02:49,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=227, Unknown=5, NotChecked=62, Total=342 [2021-11-25 18:02:49,079 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:49,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2021-11-25 18:02:49,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 18:02:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-25 18:02:49,084 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 18:02:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-25 18:02:49,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-25 18:02:49,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:49,085 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-25 18:02:49,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-25 18:02:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:02:49,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:49,086 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:49,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:02:49,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:49,300 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:49,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1260736258, now seen corresponding path program 5 times [2021-11-25 18:02:49,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:49,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965957621] [2021-11-25 18:02:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:49,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:49,317 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:02:49,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169984145] [2021-11-25 18:02:49,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:02:49,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:49,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:49,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:49,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:02:49,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:02:49,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:02:49,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:02:49,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:49,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:49,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:49,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965957621] [2021-11-25 18:02:49,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:02:49,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169984145] [2021-11-25 18:02:49,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169984145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:02:49,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758736079] [2021-11-25 18:02:49,531 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:02:49,531 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:02:49,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:02:49,532 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:02:49,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:02:49,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,630 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:02:49,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:02:49,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 18:02:49,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:02:49,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-25 18:02:49,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:49,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:49,876 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-25 18:02:49,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 430 treesize of output 419 [2021-11-25 18:02:49,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:02:49,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:50,002 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 18:02:50,003 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 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-25 18:02:50,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:50,056 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 18:02:50,057 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 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-25 18:02:50,119 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:50,120 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:02:50,176 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:50,176 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:02:50,258 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:02:50,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '591#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:02:50,503 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:02:50,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:02:50,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-25 18:02:50,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349818958] [2021-11-25 18:02:50,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:02:50,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:02:50,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:50,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:02:50,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:02:50,505 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 18:02:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:50,595 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-25 18:02:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:02:50,596 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) Word has length 11 [2021-11-25 18:02:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:50,596 INFO L225 Difference]: With dead ends: 23 [2021-11-25 18:02:50,596 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 18:02:50,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:02:50,597 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:50,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:02:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 18:02:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2021-11-25 18:02:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 18:02:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 18:02:50,602 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-11-25 18:02:50,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:50,602 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 18:02:50,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 18:02:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 18:02:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:02:50,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:50,603 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:50,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:02:50,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:50,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash 973526812, now seen corresponding path program 6 times [2021-11-25 18:02:50,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:50,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512912849] [2021-11-25 18:02:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:50,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:50,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:02:50,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782636385] [2021-11-25 18:02:50,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:02:50,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:50,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:50,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:02:50,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:02:50,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:02:50,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:02:50,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:51,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:51,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:51,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512912849] [2021-11-25 18:02:51,050 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:02:51,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782636385] [2021-11-25 18:02:51,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782636385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:02:51,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123726923] [2021-11-25 18:02:51,053 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:02:51,053 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:02:51,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:02:51,054 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:02:51,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:02:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,138 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 18:02:51,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 18:02:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,221 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:02:51,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:02:51,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 18:02:51,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 18:02:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:51,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:51,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:51,492 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 18:02:51,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 18:02:51,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:02:51,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:51,626 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 18:02:51,627 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 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-25 18:02:51,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:51,679 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 18:02:51,679 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 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-25 18:02:51,742 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:51,743 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:02:51,817 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:02:51,818 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:02:51,844 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:02:52,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '729#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:02:52,103 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:02:52,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:02:52,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 18:02:52,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95211436] [2021-11-25 18:02:52,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:02:52,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:02:52,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:52,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:02:52,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:02:52,104 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 12 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 18:02:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:52,187 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-25 18:02:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:02:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 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) Word has length 11 [2021-11-25 18:02:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:52,188 INFO L225 Difference]: With dead ends: 16 [2021-11-25 18:02:52,188 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:02:52,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:02:52,189 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:52,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:02:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:02:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 18:02:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 18:02:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 18:02:52,193 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-25 18:02:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:52,194 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 18:02:52,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 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 18:02:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 18:02:52,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:02:52,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:52,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:52,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:02:52,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 18:02:52,396 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash 114668683, now seen corresponding path program 7 times [2021-11-25 18:02:52,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:52,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732107128] [2021-11-25 18:02:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:52,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:52,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:02:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512463843] [2021-11-25 18:02:52,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:02:52,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:52,437 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:52,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:02:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-25 18:02:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:52,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:02:52,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:02:52,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-25 18:02:52,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:52,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 18:02:52,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:52,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:02:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:52,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:52,732 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 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-25 18:02:52,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 101 [2021-11-25 18:02:52,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-25 18:02:52,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 18:02:52,910 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 0 case distinctions, treesize of input 56 treesize of output 45 [2021-11-25 18:02:52,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 35 [2021-11-25 18:02:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:53,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:53,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 18:02:53,264 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6)))) (let ((.cse4 (= .cse0 2)) (.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 4))) (.cse3 (not .cse4))) (and (or (= (* 2 c_~N~0) (+ .cse0 .cse1 .cse2)) .cse3) (or .cse4 (forall ((v_ArrVal_320 (Array Int Int))) (= (* 2 c_~N~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_320) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) (select v_ArrVal_320 |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (forall ((v_ArrVal_320 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_320) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 2)) .cse4) (or (= 2 .cse2) .cse3)))))) is different from false [2021-11-25 18:02:53,902 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse16 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse17 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse11 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse17))) (.cse12 (select .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse13 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse17 4)))) (let ((.cse0 (= 2 .cse13)) (.cse4 (= .cse11 2))) (let ((.cse1 (forall ((v_ArrVal_320 (Array Int Int))) (= (* 2 c_~N~0) (+ (select v_ArrVal_320 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_320) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4))))))) (.cse3 (forall ((v_ArrVal_316 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_316) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 2))) (.cse7 (forall ((v_ArrVal_320 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_320) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4)))))) (.cse2 (not .cse4)) (.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse11 .cse12 .cse13))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse17))) (.cse6 (not .cse0))) (and (or .cse0 .cse1 .cse2) (or .cse1 .cse3 .cse4) (or (= 2 .cse5) .cse2 .cse6) (or .cse7 .cse3 .cse4) (or .cse0 .cse7 .cse2) (or (forall ((v_ArrVal_316 (Array Int Int))) (let ((.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_316) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10 4)))) (or (not (= .cse8 2)) (= (* 2 c_~N~0) (let ((.cse9 (select v_ArrVal_316 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_316 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse10)) .cse9))))))) .cse4) (or .cse2 (= (* 2 c_~N~0) (+ .cse11 .cse5 .cse12 .cse13)) .cse6) (or (forall ((v_ArrVal_316 (Array Int Int))) (let ((.cse15 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse14 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_316) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse15 4)))) (or (not (= .cse14 2)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_316 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse14 (select v_ArrVal_316 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse15)) 2))))) .cse4))))))) is different from false [2021-11-25 18:03:04,456 WARN L227 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 75 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 18:03:05,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:05,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732107128] [2021-11-25 18:03:05,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:03:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512463843] [2021-11-25 18:03:05,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512463843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124050449] [2021-11-25 18:03:05,449 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:03:05,449 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:05,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:05,449 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:05,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:05,630 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 18:03:05,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 18:03:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:05,690 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 18:03:05,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 18:03:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:05,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:05,877 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:03:05,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:03:05,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:03:05,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:05,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-25 18:03:05,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:03:05,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:06,056 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:06,056 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 18:03:06,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:06,129 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:06,129 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 18:03:06,253 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:06,254 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:03:06,350 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:06,350 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:03:06,415 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:07,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '873#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:03:07,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:07,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:03:07,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-25 18:03:07,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600085655] [2021-11-25 18:03:07,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:07,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 18:03:07,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:07,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 18:03:07,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=366, Unknown=2, NotChecked=78, Total=506 [2021-11-25 18:03:07,121 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 18:03:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:07,845 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-25 18:03:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:03:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 12 [2021-11-25 18:03:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:07,846 INFO L225 Difference]: With dead ends: 21 [2021-11-25 18:03:07,846 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 18:03:07,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=71, Invalid=441, Unknown=2, NotChecked=86, Total=600 [2021-11-25 18:03:07,847 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:07,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 86 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2021-11-25 18:03:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 18:03:07,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-25 18:03:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 18:03:07,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-25 18:03:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:07,853 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 18:03:07,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 18:03:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 18:03:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:03:07,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:07,854 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:07,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:08,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 18:03:08,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash -740129540, now seen corresponding path program 8 times [2021-11-25 18:03:08,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:08,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339768781] [2021-11-25 18:03:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:08,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:08,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:03:08,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980422005] [2021-11-25 18:03:08,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:03:08,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:08,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:08,093 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:08,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:03:08,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:03:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:03:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:08,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:08,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:08,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339768781] [2021-11-25 18:03:08,487 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:03:08,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980422005] [2021-11-25 18:03:08,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980422005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:08,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408278444] [2021-11-25 18:03:08,489 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:03:08,489 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:08,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:08,490 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:08,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:08,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,685 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:03:08,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:03:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:03:08,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 18:03:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 18:03:08,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:08,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:09,028 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 18:03:09,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 18:03:09,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:03:09,193 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:09,193 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 18:03:09,258 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:09,259 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 18:03:09,408 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:09,409 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:03:09,579 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:09,580 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:03:09,625 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:10,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1028#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:10,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:10,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:03:10,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-25 18:03:10,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905597971] [2021-11-25 18:03:10,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:10,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:03:10,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:03:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:03:10,487 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:10,701 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-25 18:03:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:03:10,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:03:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:10,702 INFO L225 Difference]: With dead ends: 26 [2021-11-25 18:03:10,702 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 18:03:10,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:03:10,703 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:10,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:03:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 18:03:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-11-25 18:03:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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 18:03:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-25 18:03:10,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2021-11-25 18:03:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:10,708 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-25 18:03:10,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-25 18:03:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:03:10,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:10,709 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:10,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:10,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:10,932 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash -197451106, now seen corresponding path program 9 times [2021-11-25 18:03:10,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:10,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191743732] [2021-11-25 18:03:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:10,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:10,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:03:10,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906120765] [2021-11-25 18:03:10,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:03:10,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:10,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:10,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:10,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:03:11,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:03:11,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:11,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:03:11,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:11,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:11,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:11,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191743732] [2021-11-25 18:03:11,465 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:03:11,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906120765] [2021-11-25 18:03:11,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906120765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:11,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861727871] [2021-11-25 18:03:11,466 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:03:11,466 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:11,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:11,467 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:11,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:11,521 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 18:03:11,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 18:03:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:11,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:11,666 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 18:03:11,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 18:03:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:11,897 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:03:11,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:03:11,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:03:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:11,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-25 18:03:11,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:03:12,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:12,094 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:12,094 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 18:03:12,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:12,209 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:12,209 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 18:03:12,354 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:12,355 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:03:12,453 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:12,453 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:03:12,513 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:13,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1193#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:03:13,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:13,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:03:13,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 18:03:13,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68907995] [2021-11-25 18:03:13,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:13,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:03:13,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:13,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:03:13,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:03:13,046 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:13,327 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-25 18:03:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:03:13,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:03:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:13,327 INFO L225 Difference]: With dead ends: 18 [2021-11-25 18:03:13,328 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 18:03:13,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:03:13,329 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:13,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:03:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 18:03:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 18:03:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-25 18:03:13,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-11-25 18:03:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:13,334 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-25 18:03:13,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-25 18:03:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:03:13,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:13,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:13,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:13,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:13,544 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1825908407, now seen corresponding path program 10 times [2021-11-25 18:03:13,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:13,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268479087] [2021-11-25 18:03:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:13,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:13,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:03:13,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003138999] [2021-11-25 18:03:13,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:03:13,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:13,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:13,568 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:13,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:03:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 18:03:13,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:13,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:03:13,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:03:13,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:03:13,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 18:03:13,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2021-11-25 18:03:13,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:13,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-25 18:03:14,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 108 [2021-11-25 18:03:14,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-25 18:03:14,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 18:03:14,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 115 [2021-11-25 18:03:14,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2021-11-25 18:03:14,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 18:03:14,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 124 [2021-11-25 18:03:14,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 42 [2021-11-25 18:03:14,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2021-11-25 18:03:14,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-11-25 18:03:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 44 [2021-11-25 18:03:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:15,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:15,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 18:03:15,477 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6)))) (let ((.cse4 (= .cse0 2)) (.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 4))) (.cse3 (not .cse4))) (and (or (= (* 2 c_~N~0) (+ .cse0 .cse1 .cse2)) .cse3) (or (forall ((v_ArrVal_516 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_516) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 2)) .cse4) (or (forall ((v_ArrVal_516 (Array Int Int))) (= (* 2 c_~N~0) (+ (select v_ArrVal_516 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_516) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4))))) .cse4) (or (= 2 .cse2) .cse3)))))) is different from false [2021-11-25 18:03:25,478 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 77 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:36,585 WARN L227 SmtUtils]: Spent 10.32s on a formula simplification. DAG size of input: 76 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-25 18:03:39,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:39,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268479087] [2021-11-25 18:03:39,945 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:03:39,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003138999] [2021-11-25 18:03:39,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003138999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:39,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613642825] [2021-11-25 18:03:39,946 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:03:39,947 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:39,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:39,947 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:39,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:39,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:39,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,133 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 18:03:40,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 18:03:40,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,345 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:03:40,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:03:40,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 18:03:40,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 18:03:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:40,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:40,727 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 18:03:40,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 18:03:40,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:03:40,901 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:40,901 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 18:03:41,014 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:41,014 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 18:03:41,176 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:41,177 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:03:41,328 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:41,328 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:03:41,361 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:43,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1363#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:43,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:43,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:03:43,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-25 18:03:43,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977757777] [2021-11-25 18:03:43,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:43,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:03:43,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:43,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:03:43,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=570, Unknown=11, NotChecked=48, Total=702 [2021-11-25 18:03:43,103 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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 18:03:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:45,174 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-25 18:03:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:03:45,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 18:03:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:45,175 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:03:45,175 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 18:03:45,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=84, Invalid=665, Unknown=11, NotChecked=52, Total=812 [2021-11-25 18:03:45,176 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:45,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 173 Invalid, 0 Unknown, 15 Unchecked, 0.8s Time] [2021-11-25 18:03:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 18:03:45,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-11-25 18:03:45,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-25 18:03:45,182 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-11-25 18:03:45,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:45,182 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-25 18:03:45,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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 18:03:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-25 18:03:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:03:45,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:45,183 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:45,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:45,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:03:45,383 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash -768477186, now seen corresponding path program 11 times [2021-11-25 18:03:45,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:45,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662577177] [2021-11-25 18:03:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:45,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:45,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:03:45,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508139386] [2021-11-25 18:03:45,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:03:45,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:45,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:45,405 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:45,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:03:45,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:03:45,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:45,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:03:45,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:45,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:46,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:46,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662577177] [2021-11-25 18:03:46,084 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:03:46,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508139386] [2021-11-25 18:03:46,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508139386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236612929] [2021-11-25 18:03:46,086 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:03:46,086 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:46,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:46,086 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:46,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:46,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,155 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 18:03:46,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 18:03:46,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,374 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:03:46,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:03:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:03:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 18:03:46,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:46,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:46,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:46,764 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 18:03:46,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 18:03:46,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:03:46,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:47,023 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 18:03:47,023 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 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-25 18:03:47,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:47,119 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 18:03:47,120 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 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-25 18:03:47,286 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:47,286 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:03:47,454 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:47,454 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:03:47,480 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:48,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1542#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:48,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:48,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:03:48,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-11-25 18:03:48,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387009068] [2021-11-25 18:03:48,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:48,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:03:48,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:48,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:03:48,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:03:48,167 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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 18:03:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:48,542 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-25 18:03:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:03:48,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:03:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:48,544 INFO L225 Difference]: With dead ends: 29 [2021-11-25 18:03:48,544 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 18:03:48,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:03:48,545 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:48,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:03:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 18:03:48,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2021-11-25 18:03:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 18:03:48,551 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2021-11-25 18:03:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:48,552 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 18:03:48,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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 18:03:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 18:03:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:03:48,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:48,552 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:48,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:48,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:03:48,753 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1125314916, now seen corresponding path program 12 times [2021-11-25 18:03:48,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:48,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646431495] [2021-11-25 18:03:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:48,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:48,766 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:03:48,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685343114] [2021-11-25 18:03:48,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:03:48,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:48,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:48,779 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:48,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:03:48,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:03:48,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:48,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:03:48,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:49,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:49,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:49,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646431495] [2021-11-25 18:03:49,575 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:03:49,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685343114] [2021-11-25 18:03:49,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685343114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:49,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278934649] [2021-11-25 18:03:49,577 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:03:49,577 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:49,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:49,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:49,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:49,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:49,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:49,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:49,854 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 18:03:49,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 18:03:49,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:49,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:03:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:49,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 18:03:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:49,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:49,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-25 18:03:50,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:50,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:50,268 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-25 18:03:50,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 430 treesize of output 419 [2021-11-25 18:03:50,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:03:50,424 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:50,424 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 18:03:50,519 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 18:03:50,519 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 18:03:50,668 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:50,669 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 18:03:50,819 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 18:03:50,819 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 18:03:50,891 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:51,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1734#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:51,825 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:51,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:03:51,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-25 18:03:51,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594623134] [2021-11-25 18:03:51,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:51,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:03:51,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:03:51,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:03:51,834 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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 18:03:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:52,365 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-25 18:03:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:03:52,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:03:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:52,368 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:03:52,368 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:03:52,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:03:52,369 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:52,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:03:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:03:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 18:03:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 18:03:52,375 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-11-25 18:03:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:52,375 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 18:03:52,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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 18:03:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 18:03:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:03:52,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:52,376 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:52,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:52,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:52,580 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash -524915445, now seen corresponding path program 13 times [2021-11-25 18:03:52,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:52,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190900723] [2021-11-25 18:03:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:52,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:52,593 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:03:52,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076829090] [2021-11-25 18:03:52,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:03:52,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:52,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:52,613 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:52,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:03:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:52,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-25 18:03:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:52,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:03:52,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:03:52,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:03:52,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:03:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:52,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:03:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2021-11-25 18:03:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2021-11-25 18:03:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 71 [2021-11-25 18:03:53,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:53,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 71 [2021-11-25 18:03:53,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 119 [2021-11-25 18:03:53,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 33 [2021-11-25 18:03:54,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2021-11-25 18:03:54,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 129 [2021-11-25 18:03:54,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 40 [2021-11-25 18:03:54,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 71 [2021-11-25 18:03:54,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2021-11-25 18:03:54,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 46 [2021-11-25 18:03:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:54,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:54,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 18:03:55,253 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6)))) (let ((.cse4 (= .cse0 2)) (.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 4))) (.cse3 (not .cse4))) (and (or (= (* 2 c_~N~0) (+ .cse0 .cse1 .cse2)) .cse3) (or .cse4 (forall ((v_ArrVal_754 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 2))) (or (forall ((v_ArrVal_754 (Array Int Int))) (= (* 2 c_~N~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) (select v_ArrVal_754 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) .cse4) (or (= 2 .cse2) .cse3)))))) is different from false [2021-11-25 18:04:16,662 WARN L227 SmtUtils]: Spent 15.79s on a formula simplification. DAG size of input: 75 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:20,060 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse18 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse19 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse14 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse19))) (.cse15 (select .cse18 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse16 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse14 .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse19 4)))) (let ((.cse3 (= .cse14 2)) (.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse14 .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse19)))) (let ((.cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse14 .cse4 .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse19))) (.cse6 (= 2 .cse16)) (.cse5 (not .cse3)) (.cse17 (forall ((v_ArrVal_754 (Array Int Int))) (= (* 2 c_~N~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (select v_ArrVal_754 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (and (or (forall ((v_ArrVal_748 (Array Int Int))) (= 2 (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2 4))) (.cse1 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse2)) .cse0 .cse1)))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse2))))) .cse3) (or (= 2 .cse4) .cse5 (not .cse6)) (or (= .cse7 2) .cse5) (or .cse3 (forall ((v_ArrVal_748 (Array Int Int))) (let ((.cse9 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse9 4)))) (or (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse9))) (not (= 2 .cse8))))))) (or (forall ((v_ArrVal_748 (Array Int Int))) (= (* 2 c_~N~0) (let ((.cse13 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse11 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse13 4))) (.cse12 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse13)))) (+ .cse10 .cse11 .cse12 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse13)))))))) .cse3) (or (= (* 2 c_~N~0) (+ .cse14 .cse7 .cse4 .cse15 .cse16)) .cse5) (or .cse17 .cse6 .cse5) (or .cse17 .cse3 (forall ((v_ArrVal_748 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4))))))))))) is different from false [2021-11-25 18:04:26,276 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse36 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse37 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse13 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse37))) (.cse15 (select .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse16 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse37 4)))) (let ((.cse14 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse37)))) (let ((.cse2 (= .cse13 2)) (.cse18 (= 2 .cse16)) (.cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse14 .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse37)))) (let ((.cse4 (= 2 .cse14)) (.cse0 (forall ((v_ArrVal_748 (Array Int Int))) (= 2 (let ((.cse42 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (let ((.cse40 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse42))) (.cse41 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse40 .cse41))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse42)) .cse40 .cse41)))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16 .cse42)))))) (.cse19 (forall ((v_ArrVal_748 (Array Int Int))) (let ((.cse39 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse38 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse39)))) (or (not (= 2 .cse38)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse38 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse39)) 2)))))) (.cse1 (forall ((v_ArrVal_745 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4))))) (.cse3 (forall ((v_ArrVal_754 (Array Int Int))) (= (* 2 c_~N~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (select v_ArrVal_754 |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (.cse8 (forall ((v_ArrVal_748 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4)))))) (.cse17 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse7 .cse14 .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16 .cse37))) (.cse6 (not .cse18)) (.cse22 (forall ((v_ArrVal_748 (Array Int Int))) (= (* 2 c_~N~0) (let ((.cse35 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse33 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse35))) (.cse34 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse32 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse33 .cse34))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse35)))) (+ .cse32 .cse33 .cse34 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse32 .cse33 .cse34))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16 .cse35))))))))) (.cse5 (not .cse2))) (and (or .cse0 .cse1 .cse2) (or .cse3 .cse4 .cse5 .cse6) (or (= .cse7 2) .cse5 (not .cse4) .cse6) (or .cse3 .cse1 .cse2 .cse8) (or (forall ((v_ArrVal_745 (Array Int Int))) (let ((.cse12 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse9 (select v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse11 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse12 4)))) (let ((.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse9 .cse11))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse12)))) (or (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse9 .cse10 .cse11))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse12))) (not (= 2 .cse10)) (not (= 2 .cse11))))))) .cse2) (or .cse5 .cse6 (= (* 2 c_~N~0) (+ .cse13 .cse7 .cse14 .cse15 .cse16 .cse17))) (or .cse0 .cse18 .cse5) (or .cse19 .cse1 .cse2) (or .cse3 (forall ((v_ArrVal_745 (Array Int Int))) (let ((.cse21 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse20 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse21 4)))) (or (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ (select v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse20))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse21))) (not (= 2 .cse20)))))) .cse2) (or .cse18 .cse19 .cse5) (or .cse1 .cse22 .cse2) (or (forall ((v_ArrVal_745 (Array Int Int))) (let ((.cse27 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse26 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse27 4)))) (or (= (* 2 c_~N~0) (let ((.cse24 (select v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse25 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse24 .cse26))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse27)))) (let ((.cse23 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse24 .cse25 .cse26))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse27)))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse23 .cse24 .cse25 .cse26))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16 .cse27)) .cse23 .cse24 .cse25 .cse26))))) (not (= 2 .cse26)))))) .cse2) (or (forall ((v_ArrVal_745 (Array Int Int))) (let ((.cse31 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse30 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse31 4)))) (or (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (let ((.cse28 (select v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse29 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse28 .cse30))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse31)))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse28 .cse29 .cse30))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse31)) .cse28 .cse29 .cse30))))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16 .cse31))) (not (= 2 .cse30)))))) .cse2) (or .cse3 .cse18 .cse5 .cse8) (or (= 2 .cse17) .cse5 .cse6) (or .cse18 .cse22 .cse5)))))))) is different from false [2021-11-25 18:04:59,570 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-25 18:04:59,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:59,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190900723] [2021-11-25 18:04:59,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:04:59,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076829090] [2021-11-25 18:04:59,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-25 18:04:59,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [141563220] [2021-11-25 18:04:59,572 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:04:59,573 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:59,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:59,573 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:59,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:59,574 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:267) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 45 more [2021-11-25 18:04:59,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-25 18:04:59,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:59,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-25 18:04:59,578 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-25 18:04:59,578 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-25 18:04:59,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:04:59,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:59,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:04:59,788 INFO L732 BasicCegarLoop]: Path program histogram: [13, 1, 1] [2021-11-25 18:04:59,789 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:04:59,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:04:59 BoogieIcfgContainer [2021-11-25 18:04:59,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:04:59,806 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:04:59,806 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:04:59,807 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:04:59,808 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:39" (3/4) ... [2021-11-25 18:04:59,811 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 18:04:59,811 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:04:59,813 INFO L158 Benchmark]: Toolchain (without parser) took 141113.09ms. Allocated memory was 125.8MB in the beginning and 178.3MB in the end (delta: 52.4MB). Free memory was 85.2MB in the beginning and 73.1MB in the end (delta: 12.1MB). Peak memory consumption was 63.5MB. Max. memory is 16.1GB. [2021-11-25 18:04:59,815 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 125.8MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:04:59,816 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.72ms. Allocated memory is still 125.8MB. Free memory was 85.0MB in the beginning and 98.5MB in the end (delta: -13.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:04:59,816 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.14ms. Allocated memory is still 125.8MB. Free memory was 98.5MB in the beginning and 96.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:04:59,817 INFO L158 Benchmark]: Boogie Preprocessor took 34.01ms. Allocated memory is still 125.8MB. Free memory was 96.9MB in the beginning and 95.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:04:59,817 INFO L158 Benchmark]: RCFGBuilder took 427.72ms. Allocated memory is still 125.8MB. Free memory was 95.4MB in the beginning and 83.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 18:04:59,817 INFO L158 Benchmark]: TraceAbstraction took 140327.21ms. Allocated memory was 125.8MB in the beginning and 178.3MB in the end (delta: 52.4MB). Free memory was 82.8MB in the beginning and 74.2MB in the end (delta: 8.6MB). Peak memory consumption was 62.1MB. Max. memory is 16.1GB. [2021-11-25 18:04:59,818 INFO L158 Benchmark]: Witness Printer took 5.16ms. Allocated memory is still 178.3MB. Free memory was 74.2MB in the beginning and 73.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:04:59,826 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 125.8MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.72ms. Allocated memory is still 125.8MB. Free memory was 85.0MB in the beginning and 98.5MB in the end (delta: -13.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.14ms. Allocated memory is still 125.8MB. Free memory was 98.5MB in the beginning and 96.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.01ms. Allocated memory is still 125.8MB. Free memory was 96.9MB in the beginning and 95.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 427.72ms. Allocated memory is still 125.8MB. Free memory was 95.4MB in the beginning and 83.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 140327.21ms. Allocated memory was 125.8MB in the beginning and 178.3MB in the end (delta: 52.4MB). Free memory was 82.8MB in the beginning and 74.2MB in the end (delta: 8.6MB). Peak memory consumption was 62.1MB. Max. memory is 16.1GB. * Witness Printer took 5.16ms. Allocated memory is still 178.3MB. Free memory was 74.2MB in the beginning and 73.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND TRUE !cond [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/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 -> 42b59db67e4ff104bf70a3f31bfda20f06e9930727bb99d5ddebd47ecfc54cb7 [2021-11-25 18:05:02,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:05:02,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:05:02,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:05:02,576 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:05:02,577 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:05:02,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/s2if.c [2021-11-25 18:05:02,637 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/data/706d6b9d4/7ec3a1fce0924d04a5f53617c83dd851/FLAG1067137a2 [2021-11-25 18:05:03,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:05:03,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/sv-benchmarks/c/array-fpi/s2if.c [2021-11-25 18:05:03,146 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/data/706d6b9d4/7ec3a1fce0924d04a5f53617c83dd851/FLAG1067137a2 [2021-11-25 18:05:03,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/data/706d6b9d4/7ec3a1fce0924d04a5f53617c83dd851 [2021-11-25 18:05:03,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:05:03,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:05:03,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:05:03,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:05:03,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:05:03,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a25b6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03, skipping insertion in model container [2021-11-25 18:05:03,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:05:03,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:05:03,654 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_2bb80646-99c2-4c80-8e59-e1d657264cfa/sv-benchmarks/c/array-fpi/s2if.c[587,600] [2021-11-25 18:05:03,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:05:03,686 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:05:03,741 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_2bb80646-99c2-4c80-8e59-e1d657264cfa/sv-benchmarks/c/array-fpi/s2if.c[587,600] [2021-11-25 18:05:03,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:05:03,791 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:05:03,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03 WrapperNode [2021-11-25 18:05:03,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:05:03,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:05:03,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:05:03,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:05:03,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,852 INFO L137 Inliner]: procedures = 21, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-11-25 18:05:03,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:05:03,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:05:03,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:05:03,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:05:03,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:05:03,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:05:03,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:05:03,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:05:03,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (1/1) ... [2021-11-25 18:05:03,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:05:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:03,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:05:03,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:05:03,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:05:03,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:05:03,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:05:03,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-25 18:05:03,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:05:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 18:05:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:05:03,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:05:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-25 18:05:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:05:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 18:05:04,070 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:05:04,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:05:04,270 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:05:04,277 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:05:04,277 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:05:04,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:05:04 BoogieIcfgContainer [2021-11-25 18:05:04,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:05:04,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:05:04,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:05:04,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:05:04,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:05:03" (1/3) ... [2021-11-25 18:05:04,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2133106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:05:04, skipping insertion in model container [2021-11-25 18:05:04,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:05:03" (2/3) ... [2021-11-25 18:05:04,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2133106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:05:04, skipping insertion in model container [2021-11-25 18:05:04,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:05:04" (3/3) ... [2021-11-25 18:05:04,302 INFO L111 eAbstractionObserver]: Analyzing ICFG s2if.c [2021-11-25 18:05:04,307 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:05:04,308 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:05:04,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:05:04,391 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 18:05:04,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:05:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 18:05:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:05:04,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:04,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:04,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-11-25 18:05:04,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:04,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069196528] [2021-11-25 18:05:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:04,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:04,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:04,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:04,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:05:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:04,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 18:05:04,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:04,630 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 18:05:04,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:05:04,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:04,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069196528] [2021-11-25 18:05:04,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069196528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:04,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:04,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:05:04,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024461999] [2021-11-25 18:05:04,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:04,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:05:04,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:05:04,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:05:04,686 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 18:05:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:04,702 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-11-25 18:05:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:05:04,704 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:05:04,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:04,712 INFO L225 Difference]: With dead ends: 34 [2021-11-25 18:05:04,713 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 18:05:04,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:05:04,721 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:04,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:05:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 18:05:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 18:05:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 18:05:04,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-25 18:05:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:04,764 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 18:05:04,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 18:05:04,764 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 18:05:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:05:04,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:04,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:04,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:04,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:04,978 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:04,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-11-25 18:05:04,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:04,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022075119] [2021-11-25 18:05:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:04,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:04,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:04,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:05,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:05:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:05,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:05:05,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:05,286 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 18:05:05,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:05:05,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:05,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022075119] [2021-11-25 18:05:05,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022075119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:05,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:05,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:05:05,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135077992] [2021-11-25 18:05:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:05,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:05:05,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:05:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:05:05,292 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 18:05:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:05,627 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-25 18:05:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:05:05,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:05:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:05,636 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:05:05,636 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 18:05:05,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:05:05,638 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:05,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 8 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:05:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 18:05:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-25 18:05:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-25 18:05:05,645 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-25 18:05:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:05,646 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-25 18:05:05,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 18:05:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-25 18:05:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:05:05,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:05,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:05,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:05,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:05,855 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:05,856 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-11-25 18:05:05,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:05,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958633790] [2021-11-25 18:05:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:05,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:05,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:05,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:05,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:05:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:05,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 18:05:05,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:06,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:05:06,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:06,235 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-25 18:05:06,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-25 18:05:06,373 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:05:06,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:05:06,904 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-11-25 18:05:06,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 46 [2021-11-25 18:05:07,252 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:05:07,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 50 [2021-11-25 18:05:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:07,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:14,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:14,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:14,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:14,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:14,297 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-25 18:05:14,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 128 [2021-11-25 18:05:14,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:14,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2021-11-25 18:05:14,324 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:05:14,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 146 [2021-11-25 18:05:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:14,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:14,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958633790] [2021-11-25 18:05:14,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958633790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:14,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1622196533] [2021-11-25 18:05:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:14,525 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:14,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:14,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:14,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-25 18:05:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:14,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:05:14,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:14,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:14,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-25 18:05:14,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:14,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:14,948 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 18:05:14,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2021-11-25 18:05:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:15,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 45 [2021-11-25 18:05:16,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:16,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 48 [2021-11-25 18:05:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:16,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:16,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:16,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:16,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:16,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:16,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 69 [2021-11-25 18:05:16,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:16,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2021-11-25 18:05:16,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-25 18:05:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:16,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1622196533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:16,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021698002] [2021-11-25 18:05:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:16,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:16,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:16,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:16,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:05:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:05:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:16,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:05:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:16,878 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-25 18:05:16,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-25 18:05:16,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 18:05:17,430 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-11-25 18:05:17,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 50 [2021-11-25 18:05:17,827 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:05:17,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 50 [2021-11-25 18:05:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:17,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:25,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:25,125 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 18:05:25,126 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 212 treesize of output 126 [2021-11-25 18:05:25,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:25,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 87 [2021-11-25 18:05:25,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2021-11-25 18:05:25,159 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:05:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 62 [2021-11-25 18:05:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:25,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021698002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:25,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:25,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 10, 11] total 36 [2021-11-25 18:05:25,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083753172] [2021-11-25 18:05:25,204 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:25,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 18:05:25,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 18:05:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1008, Unknown=10, NotChecked=0, Total=1260 [2021-11-25 18:05:25,208 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:25,928 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-25 18:05:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:05:25,937 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-25 18:05:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:25,938 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:05:25,938 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 18:05:25,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=322, Invalid=1308, Unknown=10, NotChecked=0, Total=1640 [2021-11-25 18:05:25,941 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:25,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 63 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2021-11-25 18:05:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 18:05:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-25 18:05:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-25 18:05:25,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2021-11-25 18:05:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:25,948 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-25 18:05:25,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-25 18:05:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:05:25,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:25,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:25,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:26,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 18:05:26,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:26,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:26,550 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash 680869797, now seen corresponding path program 1 times [2021-11-25 18:05:26,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:26,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992305014] [2021-11-25 18:05:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:26,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:26,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:26,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 18:05:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:26,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:05:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:26,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:05:26,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:05:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:26,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:26,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-25 18:05:26,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 18:05:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:26,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:26,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992305014] [2021-11-25 18:05:26,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992305014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:26,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1683552998] [2021-11-25 18:05:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:26,793 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:26,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:26,796 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:26,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-25 18:05:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:26,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:05:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:26,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:05:27,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:05:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:27,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:27,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-25 18:05:27,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 18:05:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:27,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1683552998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:27,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546822605] [2021-11-25 18:05:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:27,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:27,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:27,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:27,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:05:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:27,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:05:27,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:27,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:05:27,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:05:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:27,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:27,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-25 18:05:27,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 18:05:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:27,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546822605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:27,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:27,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-25 18:05:27,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637967349] [2021-11-25 18:05:27,298 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:27,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:05:27,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:27,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:05:27,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:05:27,299 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 18:05:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:27,708 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-25 18:05:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:05:27,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 16 [2021-11-25 18:05:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:27,715 INFO L225 Difference]: With dead ends: 33 [2021-11-25 18:05:27,716 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 18:05:27,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:05:27,717 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:27,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 48 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:05:27,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 18:05:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-25 18:05:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-25 18:05:27,726 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-11-25 18:05:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:27,727 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-25 18:05:27,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 18:05:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-25 18:05:27,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:05:27,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:27,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:27,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:27,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:28,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-25 18:05:28,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:28,334 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:28,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:28,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-11-25 18:05:28,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:28,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324281972] [2021-11-25 18:05:28,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:05:28,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:28,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:28,338 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:28,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 18:05:28,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:05:28,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:05:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:28,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:28,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:28,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324281972] [2021-11-25 18:05:28,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324281972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:28,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1114882702] [2021-11-25 18:05:28,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:05:28,931 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:28,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:28,944 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:28,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-25 18:05:29,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:05:29,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:29,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:05:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:29,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:29,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1114882702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:29,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321576758] [2021-11-25 18:05:29,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:05:29,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:29,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:29,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:05:29,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:05:29,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:29,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:05:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:29,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:29,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321576758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:29,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:29,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 8, 7] total 25 [2021-11-25 18:05:29,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357091964] [2021-11-25 18:05:29,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:29,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 18:05:29,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:29,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 18:05:29,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:05:29,706 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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 18:05:30,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:30,910 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-11-25 18:05:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:05:30,915 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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 18 [2021-11-25 18:05:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:30,916 INFO L225 Difference]: With dead ends: 54 [2021-11-25 18:05:30,917 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 18:05:30,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:05:30,918 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 208 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:30,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 21 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:05:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 18:05:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2021-11-25 18:05:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-25 18:05:30,927 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 18 [2021-11-25 18:05:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:30,927 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-25 18:05:30,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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 18:05:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-25 18:05:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:05:30,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:30,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:30,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:31,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:31,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-11-25 18:05:31,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:31,537 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:31,537 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-11-25 18:05:31,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:31,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450378280] [2021-11-25 18:05:31,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:05:31,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:31,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:31,541 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:31,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 18:05:31,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:05:31,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:31,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:05:31,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:31,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:32,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:32,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450378280] [2021-11-25 18:05:32,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450378280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:32,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1782327789] [2021-11-25 18:05:32,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:05:32,003 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:32,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:32,004 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:32,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-25 18:05:32,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:05:32,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:05:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:32,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:32,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1782327789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:32,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243445951] [2021-11-25 18:05:32,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:05:32,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:32,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:32,318 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:32,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:05:32,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:05:32,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:32,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:05:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:32,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243445951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:32,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:32,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 8, 7] total 17 [2021-11-25 18:05:32,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802909031] [2021-11-25 18:05:32,605 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:32,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:05:32,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:05:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:05:32,611 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 18:05:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:33,280 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-25 18:05:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:05:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 19 [2021-11-25 18:05:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:33,281 INFO L225 Difference]: With dead ends: 46 [2021-11-25 18:05:33,281 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 18:05:33,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:05:33,282 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:33,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 16 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:05:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 18:05:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-25 18:05:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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 18:05:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-25 18:05:33,289 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2021-11-25 18:05:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:33,289 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-25 18:05:33,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 18:05:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-25 18:05:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:05:33,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:33,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:33,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:33,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-25 18:05:33,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-25 18:05:33,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:33,892 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-11-25 18:05:33,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:33,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632363060] [2021-11-25 18:05:33,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:05:33,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:33,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:33,894 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:33,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 18:05:34,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:05:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 18:05:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:34,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:05:34,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:34,127 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-25 18:05:34,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-25 18:05:34,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 18:05:34,287 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:05:34,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:05:34,705 INFO L354 Elim1Store]: treesize reduction 51, result has 20.3 percent of original size [2021-11-25 18:05:34,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 62 [2021-11-25 18:05:35,042 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-25 18:05:35,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 115 treesize of output 71 [2021-11-25 18:05:35,367 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-11-25 18:05:35,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 79 [2021-11-25 18:05:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:35,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:41,906 INFO L354 Elim1Store]: treesize reduction 16, result has 62.8 percent of original size [2021-11-25 18:05:41,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1869 treesize of output 1155 [2021-11-25 18:05:49,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,458 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-25 18:05:49,458 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 1203 treesize of output 1 [2021-11-25 18:05:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:49,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:49,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632363060] [2021-11-25 18:05:49,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632363060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:49,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [733954885] [2021-11-25 18:05:49,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:05:49,465 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:49,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:49,467 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:49,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-25 18:05:49,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:05:49,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:05:49,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:49,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:49,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-25 18:05:50,014 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:50,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-11-25 18:05:50,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:50,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-25 18:05:50,452 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:50,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-11-25 18:05:50,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:50,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-25 18:05:54,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:54,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:54,368 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-11-25 18:05:54,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 53 [2021-11-25 18:05:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:55,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 67 [2021-11-25 18:05:55,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:55,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 75 [2021-11-25 18:05:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:55,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:16,328 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-25 18:06:16,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1241 treesize of output 1 [2021-11-25 18:06:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:06:16,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [733954885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:06:16,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110221555] [2021-11-25 18:06:16,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:06:16,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:16,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:16,353 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:16,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:06:16,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:06:16,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:06:16,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:06:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:16,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:06:17,058 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-25 18:06:17,058 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 18 treesize of output 18 [2021-11-25 18:06:17,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:06:17,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 18:06:18,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 18:06:32,017 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-11-25 18:06:32,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 50 [2021-11-25 18:06:36,580 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-25 18:06:36,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 77 [2021-11-25 18:06:41,999 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-25 18:06:41,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 79 [2021-11-25 18:06:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:06:42,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:46,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:07:46,998 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-25 18:07:46,998 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 1489 treesize of output 1 [2021-11-25 18:07:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:47,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110221555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:07:47,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:07:47,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 14, 12] total 63 [2021-11-25 18:07:47,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729205195] [2021-11-25 18:07:47,078 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:07:47,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-25 18:07:47,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:47,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-25 18:07:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=3384, Unknown=37, NotChecked=0, Total=3906 [2021-11-25 18:07:47,083 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 63 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 63 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:20,311 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-25 18:08:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:08:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 63 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-25 18:08:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:20,313 INFO L225 Difference]: With dead ends: 38 [2021-11-25 18:08:20,314 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 18:08:20,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 147.6s TimeCoverageRelationStatistics Valid=714, Invalid=4798, Unknown=38, NotChecked=0, Total=5550 [2021-11-25 18:08:20,316 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:20,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 87 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 101 Unchecked, 3.7s Time] [2021-11-25 18:08:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 18:08:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-25 18:08:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-25 18:08:20,322 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2021-11-25 18:08:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:20,323 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-25 18:08:20,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 63 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-25 18:08:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:08:20,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:20,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:20,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:20,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:20,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:20,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:20,933 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:20,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:20,933 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2021-11-25 18:08:20,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:08:20,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808257411] [2021-11-25 18:08:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:20,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:08:20,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:08:20,935 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:08:20,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 18:08:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:21,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:08:21,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:21,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:08:22,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:23,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:08:24,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 18:08:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:25,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:26,675 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_334 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_334) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:08:26,879 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_334 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_334) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:08:27,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:27,141 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:08:27,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:27,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 18:08:27,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 18:08:29,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:08:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808257411] [2021-11-25 18:08:29,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808257411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [668300324] [2021-11-25 18:08:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:29,297 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:08:29,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:08:29,299 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:08:29,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-25 18:08:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:29,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:08:29,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:31,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:34,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:34,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:08:37,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:08:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:38,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:38,495 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_355 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_355) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:08:38,714 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_355 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_355) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:08:38,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:38,979 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:08:39,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:39,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 18:08:39,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 18:08:40,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [668300324] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:40,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487529691] [2021-11-25 18:08:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:40,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:40,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:40,040 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:40,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 18:08:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:40,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:08:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:40,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:08:43,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:46,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:08:48,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:08:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:48,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:49,097 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_378 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv2 32))) is different from false [2021-11-25 18:08:49,297 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_378 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:08:49,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:49,591 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:08:49,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:49,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 18:08:49,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 18:08:50,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487529691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:50,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:08:50,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 31 [2021-11-25 18:08:50,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982132328] [2021-11-25 18:08:50,432 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:50,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:08:50,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:08:50,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:08:50,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=505, Unknown=6, NotChecked=306, Total=930 [2021-11-25 18:08:50,434 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 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 18:08:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:56,930 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-25 18:08:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:08:56,931 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-25 18:08:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:56,932 INFO L225 Difference]: With dead ends: 36 [2021-11-25 18:08:56,932 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 18:08:56,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 6 IntricatePredicates, 2 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=138, Invalid=582, Unknown=6, NotChecked=330, Total=1056 [2021-11-25 18:08:56,934 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:56,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 114 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 79 Unchecked, 2.3s Time] [2021-11-25 18:08:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 18:08:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 18:08:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 18:08:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-25 18:08:56,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-11-25 18:08:56,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:56,948 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-25 18:08:56,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 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 18:08:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-25 18:08:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:08:56,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:56,950 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:56,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-25 18:08:57,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:57,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:57,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:57,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2021-11-25 18:08:57,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:08:57,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836968679] [2021-11-25 18:08:57,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 18:08:57,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:08:57,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:08:57,555 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:08:57,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 18:08:57,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-25 18:08:57,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:08:57,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:05,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:12,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:12,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836968679] [2021-11-25 18:09:12,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836968679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:12,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [19405110] [2021-11-25 18:09:12,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 18:09:12,438 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:09:12,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:09:12,439 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:09:12,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-25 18:09:12,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-25 18:09:12,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:09:12,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:09:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:23,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:32,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [19405110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:32,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125511979] [2021-11-25 18:09:32,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 18:09:32,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:32,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:32,108 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:32,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 18:09:32,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-25 18:09:32,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:09:32,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:09:32,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:37,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:39,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125511979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:39,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:09:39,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13, 12, 14, 12] total 38 [2021-11-25 18:09:39,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993477992] [2021-11-25 18:09:39,709 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:09:39,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 18:09:39,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 18:09:39,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 18:09:39,712 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:09,856 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-25 18:10:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 18:10:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-25 18:10:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:09,858 INFO L225 Difference]: With dead ends: 57 [2021-11-25 18:10:09,858 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 18:10:09,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=708, Invalid=2154, Unknown=0, NotChecked=0, Total=2862 [2021-11-25 18:10:09,861 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 216 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:09,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 25 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2021-11-25 18:10:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 18:10:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-11-25 18:10:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 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 18:10:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-25 18:10:09,870 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 23 [2021-11-25 18:10:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:09,871 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-25 18:10:09,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-25 18:10:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:10:09,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:09,873 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:09,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:10,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:10,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-25 18:10:10,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:10,476 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 6 times [2021-11-25 18:10:10,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:10,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917820509] [2021-11-25 18:10:10,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 18:10:10,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:10,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:10,478 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:10,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 18:10:10,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-25 18:10:10,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:10:10,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 18:10:10,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:12,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:10:12,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:12,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:12,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-25 18:10:13,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:10:14,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:10:15,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:10:20,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:20,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 51 [2021-11-25 18:10:25,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:25,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:25,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 75 [2021-11-25 18:10:31,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:31,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:32,516 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-25 18:10:32,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 160 treesize of output 103 [2021-11-25 18:10:37,899 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-25 18:10:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 186 treesize of output 130 [2021-11-25 18:10:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:10:39,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:11:20,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:20,159 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-25 18:11:20,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 7353 treesize of output 1 [2021-11-25 18:11:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:11:20,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:11:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917820509] [2021-11-25 18:11:20,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917820509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:11:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [174573185] [2021-11-25 18:11:20,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 18:11:20,206 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:11:20,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:11:20,208 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:11:20,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-25 18:11:20,373 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:11:20,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408182217] [2021-11-25 18:11:20,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 18:11:20,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 1 [2021-11-25 18:11:20,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:11:20,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:11:20,375 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:11:20,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 18:11:20,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-25 18:11:20,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:11:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 18:11:20,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:11:21,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:21,685 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-25 18:11:21,685 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 18 treesize of output 18 [2021-11-25 18:11:21,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:11:24,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 18:11:24,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 18:11:25,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 18:11:32,378 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-11-25 18:11:32,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 50 [2021-11-25 18:11:40,512 INFO L354 Elim1Store]: treesize reduction 54, result has 19.4 percent of original size [2021-11-25 18:11:40,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 78 [2021-11-25 18:11:50,824 INFO L354 Elim1Store]: treesize reduction 89, result has 12.7 percent of original size [2021-11-25 18:11:50,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 119 [2021-11-25 18:12:00,993 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-25 18:12:00,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 134 [2021-11-25 18:12:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:12:01,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:12:37,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:37,518 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-25 18:12:37,518 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 8333 treesize of output 1 [2021-11-25 18:12:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 5 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:12:37,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408182217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:12:37,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-25 18:12:37,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 16] total 46 [2021-11-25 18:12:37,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223114774] [2021-11-25 18:12:37,570 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-25 18:12:37,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 18:12:37,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:12:37,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 18:12:37,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1774, Unknown=10, NotChecked=0, Total=2070 [2021-11-25 18:12:37,573 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 46 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:12:54,519 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 99 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:13:20,252 WARN L227 SmtUtils]: Spent 15.66s on a formula simplification. DAG size of input: 132 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:14:11,225 WARN L227 SmtUtils]: Spent 21.64s on a formula simplification. DAG size of input: 136 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:14:19,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:21,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:35,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:15:13,900 WARN L227 SmtUtils]: Spent 29.72s on a formula simplification. DAG size of input: 123 DAG size of output: 118 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:15:27,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:15:40,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:15:41,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:15:43,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:15:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:49,726 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2021-11-25 18:15:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 18:15:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 46 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 18:15:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:49,730 INFO L225 Difference]: With dead ends: 74 [2021-11-25 18:15:49,730 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 18:15:49,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 250.5s TimeCoverageRelationStatistics Valid=674, Invalid=4145, Unknown=11, NotChecked=0, Total=4830 [2021-11-25 18:15:49,732 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 73 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 37.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:49,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 55 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 305 Invalid, 4 Unknown, 130 Unchecked, 37.0s Time] [2021-11-25 18:15:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 18:15:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2021-11-25 18:15:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 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 18:15:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-11-25 18:15:49,744 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 26 [2021-11-25 18:15:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:49,744 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-11-25 18:15:49,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 46 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:15:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-11-25 18:15:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:15:49,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:49,746 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:49,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:49,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:50,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:15:50,154 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:50,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 2 times [2021-11-25 18:15:50,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:15:50,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691251056] [2021-11-25 18:15:50,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:15:50,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:15:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:15:50,157 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:15:50,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-25 18:15:50,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:15:50,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:15:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:15:50,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:50,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 18:15:52,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:15:54,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:15:55,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:15:57,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 18:15:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:15:58,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:00,624 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_567 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_567) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:16:00,942 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_567 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_567) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:16:01,351 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_567 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_567) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:16:01,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:01,793 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:16:02,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:02,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 18:16:02,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:16:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-25 18:16:06,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:16:06,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691251056] [2021-11-25 18:16:06,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691251056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:16:06,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1673526053] [2021-11-25 18:16:06,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:16:06,462 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:16:06,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:16:06,463 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:16:06,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-25 18:16:06,666 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:16:06,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802481212] [2021-11-25 18:16:06,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:16:06,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:06,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:06,669 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:06,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 18:16:06,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 1 [2021-11-25 18:16:06,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:16:06,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:16:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 18:16:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 18:16:11,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:16:15,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:16:17,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:16:20,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:16:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:16:20,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:20,860 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_618 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_618) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:16:21,111 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_618 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv2 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_618) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 18:16:21,427 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_618 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_618) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv2 32))) is different from false [2021-11-25 18:16:21,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:21,736 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:16:22,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:22,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 18:16:22,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:16:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-25 18:16:23,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802481212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:16:23,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-25 18:16:23,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 30 [2021-11-25 18:16:23,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236149610] [2021-11-25 18:16:23,017 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:23,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-25 18:16:23,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:16:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-25 18:16:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=474, Unknown=6, NotChecked=294, Total=870 [2021-11-25 18:16:23,019 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:16:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:40,628 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-11-25 18:16:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:16:40,644 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 18:16:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:40,645 INFO L225 Difference]: With dead ends: 68 [2021-11-25 18:16:40,645 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 18:16:40,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=149, Invalid=737, Unknown=8, NotChecked=366, Total=1260 [2021-11-25 18:16:40,647 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:40,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 264 Invalid, 0 Unknown, 145 Unchecked, 10.4s Time] [2021-11-25 18:16:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 18:16:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-25 18:16:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 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 18:16:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-11-25 18:16:40,659 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 26 [2021-11-25 18:16:40,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:40,659 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-11-25 18:16:40,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:16:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-11-25 18:16:40,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:16:40,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:40,662 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:40,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb80646-99c2-4c80-8e59-e1d657264cfa/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0