./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condg.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/condg.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl --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 2909e53e12aac54327f6ce090ad489c978c1fbcfb0ae8bd4172abe8a99b2cb53 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:49:48,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:49:48,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:49:48,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:49:48,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:49:48,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:49:48,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:49:48,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:49:48,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:49:48,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:49:48,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:49:48,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:49:48,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:49:48,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:49:48,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:49:48,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:49:48,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:49:48,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:49:48,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:49:48,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:49:48,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:49:48,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:49:48,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:49:48,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:49:48,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:49:48,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:49:48,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:49:48,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:49:48,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:49:48,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:49:48,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:49:48,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:49:48,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:49:48,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:49:48,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:49:48,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:49:48,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:49:48,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:49:48,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:49:48,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:49:48,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:49:48,522 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:49:48,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:49:48,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:49:48,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:49:48,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:49:48,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:49:48,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:49:48,583 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:49:48,584 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:49:48,584 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:49:48,584 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:49:48,586 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:49:48,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:49:48,586 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:49:48,586 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:49:48,587 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:49:48,587 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:49:48,587 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:49:48,588 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:49:48,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:49:48,589 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:49:48,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:49:48,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:49:48,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:49:48,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:49:48,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:49:48,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:49:48,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:49:48,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:49:48,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:49:48,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:49:48,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:49:48,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:49:48,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:49:48,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:49:48,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:49:48,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:49:48,593 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:49:48,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:49:48,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:49:48,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:49:48,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:49:48,595 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_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2909e53e12aac54327f6ce090ad489c978c1fbcfb0ae8bd4172abe8a99b2cb53 [2021-11-23 16:49:48,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:49:48,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:49:48,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:49:48,943 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:49:48,943 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:49:48,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/condg.c [2021-11-23 16:49:49,027 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data/ac149cb47/42149bf0c0c14590836c61e78205110b/FLAG0c1fb87f7 [2021-11-23 16:49:49,595 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:49:49,598 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/sv-benchmarks/c/array-fpi/condg.c [2021-11-23 16:49:49,609 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data/ac149cb47/42149bf0c0c14590836c61e78205110b/FLAG0c1fb87f7 [2021-11-23 16:49:49,895 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data/ac149cb47/42149bf0c0c14590836c61e78205110b [2021-11-23 16:49:49,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:49:49,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:49:49,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:49:49,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:49:49,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:49:49,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:49:49" (1/1) ... [2021-11-23 16:49:49,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@504e66ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:49, skipping insertion in model container [2021-11-23 16:49:49,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:49:49" (1/1) ... [2021-11-23 16:49:49,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:49:49,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:49:50,124 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_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/sv-benchmarks/c/array-fpi/condg.c[588,601] [2021-11-23 16:49:50,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:49:50,165 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:49:50,182 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_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/sv-benchmarks/c/array-fpi/condg.c[588,601] [2021-11-23 16:49:50,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:49:50,210 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:49:50,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50 WrapperNode [2021-11-23 16:49:50,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:49:50,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:49:50,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:49:50,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:49:50,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,258 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2021-11-23 16:49:50,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:49:50,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:49:50,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:49:50,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:49:50,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:49:50,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:49:50,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:49:50,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:49:50,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:50" (1/1) ... [2021-11-23 16:49:50,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:49:50,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:50,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:49:50,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:49:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:49:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:49:50,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:49:50,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:49:50,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 16:49:50,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:49:50,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:49:50,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:49:50,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:49:50,516 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:49:50,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:49:50,748 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:49:50,784 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$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) [2021-11-23 16:49:50,789 INFO L158 Benchmark]: Toolchain (without parser) took 887.81ms. Allocated memory is still 100.7MB. Free memory was 58.6MB in the beginning and 59.8MB in the end (delta: -1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:49:50,790 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 100.7MB. Free memory was 74.7MB in the beginning and 74.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:49:50,791 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.32ms. Allocated memory is still 100.7MB. Free memory was 58.3MB in the beginning and 74.5MB in the end (delta: -16.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 16:49:50,793 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.43ms. Allocated memory is still 100.7MB. Free memory was 74.5MB in the beginning and 72.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:49:50,794 INFO L158 Benchmark]: Boogie Preprocessor took 64.75ms. Allocated memory is still 100.7MB. Free memory was 72.8MB in the beginning and 71.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:49:50,796 INFO L158 Benchmark]: RCFGBuilder took 460.49ms. Allocated memory is still 100.7MB. Free memory was 71.5MB in the beginning and 59.8MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 16:49:50,802 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 100.7MB. Free memory was 74.7MB in the beginning and 74.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.32ms. Allocated memory is still 100.7MB. Free memory was 58.3MB in the beginning and 74.5MB in the end (delta: -16.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.43ms. Allocated memory is still 100.7MB. Free memory was 74.5MB in the beginning and 72.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.75ms. Allocated memory is still 100.7MB. Free memory was 72.8MB in the beginning and 71.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 460.49ms. Allocated memory is still 100.7MB. Free memory was 71.5MB in the beginning and 59.8MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:49:50,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/condg.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl --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 2909e53e12aac54327f6ce090ad489c978c1fbcfb0ae8bd4172abe8a99b2cb53 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:49:53,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:49:53,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:49:53,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:49:53,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:49:53,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:49:53,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:49:53,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:49:53,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:49:53,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:49:53,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:49:53,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:49:53,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:49:53,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:49:53,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:49:53,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:49:53,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:49:53,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:49:53,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:49:53,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:49:53,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:49:53,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:49:53,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:49:53,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:49:53,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:49:53,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:49:53,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:49:53,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:49:53,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:49:53,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:49:53,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:49:53,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:49:53,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:49:53,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:49:53,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:49:53,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:49:53,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:49:53,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:49:53,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:49:53,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:49:53,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:49:53,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:49:53,892 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:49:53,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:49:53,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:49:53,893 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:49:53,894 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:49:53,894 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:49:53,894 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:49:53,894 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:49:53,895 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:49:53,895 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:49:53,895 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:49:53,895 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:49:53,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:49:53,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:49:53,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:49:53,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:49:53,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:49:53,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:49:53,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:49:53,901 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:49:53,902 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:49:53,902 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:49:53,902 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:49:53,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:49:53,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:49:53,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:49:53,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:49:53,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:49:53,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:49:53,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:49:53,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:49:53,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:49:53,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:49:53,905 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:49:53,905 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:53,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:49:53,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:49:53,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:49:53,906 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2909e53e12aac54327f6ce090ad489c978c1fbcfb0ae8bd4172abe8a99b2cb53 [2021-11-23 16:49:54,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:49:54,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:49:54,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:49:54,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:49:54,425 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:49:54,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/condg.c [2021-11-23 16:49:54,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data/a3c7c3106/8d99fdf72bee479f8d4d150abab1b3ce/FLAG3dbbd8d5e [2021-11-23 16:49:55,150 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:49:55,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/sv-benchmarks/c/array-fpi/condg.c [2021-11-23 16:49:55,162 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data/a3c7c3106/8d99fdf72bee479f8d4d150abab1b3ce/FLAG3dbbd8d5e [2021-11-23 16:49:55,482 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/data/a3c7c3106/8d99fdf72bee479f8d4d150abab1b3ce [2021-11-23 16:49:55,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:49:55,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:49:55,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:49:55,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:49:55,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:49:55,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6838d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55, skipping insertion in model container [2021-11-23 16:49:55,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:49:55,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:49:55,795 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_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/sv-benchmarks/c/array-fpi/condg.c[588,601] [2021-11-23 16:49:55,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:49:55,834 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:49:55,848 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_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/sv-benchmarks/c/array-fpi/condg.c[588,601] [2021-11-23 16:49:55,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:49:55,884 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:49:55,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55 WrapperNode [2021-11-23 16:49:55,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:49:55,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:49:55,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:49:55,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:49:55,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,945 INFO L137 Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2021-11-23 16:49:55,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:49:55,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:49:55,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:49:55,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:49:55,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:55,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:49:55,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:49:55,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:49:55,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:49:55,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (1/1) ... [2021-11-23 16:49:56,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:49:56,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:56,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:49:56,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:49:56,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:49:56,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:49:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:49:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 16:49:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 16:49:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:49:56,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:49:56,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:49:56,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 16:49:56,161 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:49:56,163 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:49:56,434 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:49:56,441 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:49:56,455 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 16:49:56,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:49:56 BoogieIcfgContainer [2021-11-23 16:49:56,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:49:56,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:49:56,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:49:56,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:49:56,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:49:55" (1/3) ... [2021-11-23 16:49:56,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c37ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:49:56, skipping insertion in model container [2021-11-23 16:49:56,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:55" (2/3) ... [2021-11-23 16:49:56,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c37ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:49:56, skipping insertion in model container [2021-11-23 16:49:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:49:56" (3/3) ... [2021-11-23 16:49:56,477 INFO L111 eAbstractionObserver]: Analyzing ICFG condg.c [2021-11-23 16:49:56,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:49:56,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:49:56,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:49:56,543 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 [2021-11-23 16:49:56,543 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:49:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 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) [2021-11-23 16:49:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:49:56,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:56,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:56,580 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash -592817118, now seen corresponding path program 1 times [2021-11-23 16:49:56,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:56,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151676947] [2021-11-23 16:49:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:56,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:56,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:56,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:56,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:49:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:56,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 16:49:56,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:56,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:56,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:56,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151676947] [2021-11-23 16:49:56,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151676947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:56,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:56,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:49:56,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575968452] [2021-11-23 16:49:56,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:56,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 16:49:56,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:56,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 16:49:56,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:49:56,912 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 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) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2021-11-23 16:49:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:56,947 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2021-11-23 16:49:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 16:49:56,953 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 16:49:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:56,962 INFO L225 Difference]: With dead ends: 46 [2021-11-23 16:49:56,962 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 16:49:56,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:49:56,970 INFO L933 BasicCegarLoop]: 30 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, 30 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 [2021-11-23 16:49:56,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:49:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 16:49:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 16:49:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-23 16:49:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 16:49:57,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2021-11-23 16:49:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:57,013 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 16:49:57,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2021-11-23 16:49:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 16:49:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:49:57,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:57,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:57,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:57,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:57,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash 108247460, now seen corresponding path program 1 times [2021-11-23 16:49:57,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:57,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055583637] [2021-11-23 16:49:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:57,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:57,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:57,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:49:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:57,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:49:57,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:57,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:57,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055583637] [2021-11-23 16:49:57,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055583637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:57,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:57,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:49:57,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486012269] [2021-11-23 16:49:57,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:57,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:57,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:57,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:57,536 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:57,806 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-11-23 16:49:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:49:57,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 16:49:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:57,808 INFO L225 Difference]: With dead ends: 48 [2021-11-23 16:49:57,808 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 16:49:57,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:49:57,811 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:57,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 14 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:49:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 16:49:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-11-23 16:49:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-23 16:49:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-23 16:49:57,820 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2021-11-23 16:49:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:57,821 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-23 16:49:57,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-23 16:49:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:49:57,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:57,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:57,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:58,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:58,035 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1242970242, now seen corresponding path program 1 times [2021-11-23 16:49:58,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940722724] [2021-11-23 16:49:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:58,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:58,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:58,037 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:58,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:49:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:58,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:49:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:58,220 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 [2021-11-23 16:49:58,291 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 [2021-11-23 16:49:58,380 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 14 treesize of output 16 [2021-11-23 16:49:58,479 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 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 16:49:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:58,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:58,782 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_32 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_32) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:49:58,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:49:58,864 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 22 treesize of output 23 [2021-11-23 16:49:58,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:49:58,879 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 34 treesize of output 34 [2021-11-23 16:49:58,888 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 9 treesize of output 7 [2021-11-23 16:49:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 16:49:58,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:58,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940722724] [2021-11-23 16:49:58,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940722724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:58,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232299370] [2021-11-23 16:49:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:58,989 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:58,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:58,994 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:59,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 16:49:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:59,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:49:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:59,285 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 [2021-11-23 16:49:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:49:59,454 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 14 treesize of output 16 [2021-11-23 16:49:59,730 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 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 16:49:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:59,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:00,040 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_50 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_50) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:50:00,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:50:00,109 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 22 treesize of output 23 [2021-11-23 16:50:00,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:50:00,132 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 34 treesize of output 34 [2021-11-23 16:50:00,139 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 9 treesize of output 7 [2021-11-23 16:50:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 16:50:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1232299370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330049011] [2021-11-23 16:50:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:00,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:00,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:00,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 16:50:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 16:50:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:00,417 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 [2021-11-23 16:50:00,499 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 [2021-11-23 16:50:00,624 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 14 treesize of output 16 [2021-11-23 16:50:00,749 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 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 16:50:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:00,954 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_69 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_69) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:50:00,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:50:00,984 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 22 treesize of output 23 [2021-11-23 16:50:00,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:50:01,000 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 34 treesize of output 34 [2021-11-23 16:50:01,006 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 9 treesize of output 7 [2021-11-23 16:50:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 16:50:01,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330049011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:01,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:01,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 9] total 29 [2021-11-23 16:50:01,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75792647] [2021-11-23 16:50:01,043 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:01,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 16:50:01,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:01,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 16:50:01,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=558, Unknown=3, NotChecked=150, Total=812 [2021-11-23 16:50:01,047 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:01,357 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-11-23 16:50:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:50:01,359 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 16:50:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:01,360 INFO L225 Difference]: With dead ends: 44 [2021-11-23 16:50:01,361 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 16:50:01,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=117, Invalid=648, Unknown=3, NotChecked=162, Total=930 [2021-11-23 16:50:01,363 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:01,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 131 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-11-23 16:50:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 16:50:01,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-11-23 16:50:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-11-23 16:50:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-23 16:50:01,375 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 21 [2021-11-23 16:50:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:01,376 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-23 16:50:01,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-23 16:50:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:50:01,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:01,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:01,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:01,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 16:50:01,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:01,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:01,991 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash 532037120, now seen corresponding path program 1 times [2021-11-23 16:50:01,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:01,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383435832] [2021-11-23 16:50:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:01,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:01,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:02,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:02,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:50:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 16:50:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:02,190 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 [2021-11-23 16:50:02,216 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 [2021-11-23 16:50:02,277 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 23 treesize of output 22 [2021-11-23 16:50:02,569 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 [2021-11-23 16:50:02,792 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 26 treesize of output 10 [2021-11-23 16:50:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:02,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:09,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:09,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:09,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383435832] [2021-11-23 16:50:09,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383435832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380243589] [2021-11-23 16:50:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:09,436 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:09,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:09,439 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:09,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 16:50:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:09,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 16:50:09,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:09,648 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 [2021-11-23 16:50:09,824 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-23 16:50:09,824 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 23 treesize of output 34 [2021-11-23 16:50:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:10,432 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 [2021-11-23 16:50:10,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:10,698 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 26 treesize of output 10 [2021-11-23 16:50:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:10,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:11,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:11,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380243589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:11,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178560602] [2021-11-23 16:50:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:11,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:11,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:11,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 16:50:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:11,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 16:50:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:11,279 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 [2021-11-23 16:50:11,305 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 [2021-11-23 16:50:11,382 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 23 treesize of output 22 [2021-11-23 16:50:11,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 16:50:11,928 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 26 treesize of output 10 [2021-11-23 16:50:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:11,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:12,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:12,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178560602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:12,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:12,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 10, 10] total 33 [2021-11-23 16:50:12,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398499921] [2021-11-23 16:50:12,153 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:12,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 16:50:12,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 16:50:12,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=840, Unknown=2, NotChecked=0, Total=1056 [2021-11-23 16:50:12,156 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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) [2021-11-23 16:50:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:13,080 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-11-23 16:50:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 16:50:13,081 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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 21 [2021-11-23 16:50:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:13,083 INFO L225 Difference]: With dead ends: 54 [2021-11-23 16:50:13,083 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 16:50:13,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=276, Invalid=1128, Unknown=2, NotChecked=0, Total=1406 [2021-11-23 16:50:13,086 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:13,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 124 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2021-11-23 16:50:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 16:50:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2021-11-23 16:50:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-11-23 16:50:13,097 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 21 [2021-11-23 16:50:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:13,097 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-11-23 16:50:13,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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) [2021-11-23 16:50:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-11-23 16:50:13,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 16:50:13,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:13,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:13,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:13,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 16:50:13,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 16:50:13,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:13,702 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 607460608, now seen corresponding path program 2 times [2021-11-23 16:50:13,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:13,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621671174] [2021-11-23 16:50:13,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:50:13,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:13,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:13,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:13,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:50:13,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:50:13,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:50:13,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:50:13,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:50:14,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:50:14,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:14,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621671174] [2021-11-23 16:50:14,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621671174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:14,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [273382481] [2021-11-23 16:50:14,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:50:14,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:14,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:14,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 16:50:14,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:50:14,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:50:14,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:50:14,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:50:14,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:50:14,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [273382481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:14,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339304658] [2021-11-23 16:50:14,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:50:14,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:14,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:14,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 16:50:14,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:50:14,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:50:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:50:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:50:15,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:50:15,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339304658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:15,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:15,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 8, 7] total 27 [2021-11-23 16:50:15,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306085522] [2021-11-23 16:50:15,234 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:15,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 16:50:15,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:15,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 16:50:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-11-23 16:50:15,238 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:16,006 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-11-23 16:50:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 16:50:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 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 [2021-11-23 16:50:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:16,009 INFO L225 Difference]: With dead ends: 76 [2021-11-23 16:50:16,009 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 16:50:16,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 16:50:16,012 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 179 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:16,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 89 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:50:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 16:50:16,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2021-11-23 16:50:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-11-23 16:50:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-23 16:50:16,021 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-11-23 16:50:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:16,022 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-23 16:50:16,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-23 16:50:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 16:50:16,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:16,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:16,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:16,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:16,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:16,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:16,625 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:16,625 INFO L85 PathProgramCache]: Analyzing trace with hash 943879772, now seen corresponding path program 3 times [2021-11-23 16:50:16,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:16,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339282789] [2021-11-23 16:50:16,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:50:16,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:16,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:16,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:16,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:50:16,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 16:50:16,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:50:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:50:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:16,755 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 [2021-11-23 16:50:16,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:50:16,893 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:50:16,893 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 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:50:16,952 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 14 treesize of output 16 [2021-11-23 16:50:16,976 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 14 treesize of output 16 [2021-11-23 16:50:17,054 INFO L354 Elim1Store]: treesize reduction 43, result has 6.5 percent of original size [2021-11-23 16:50:17,054 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 33 treesize of output 20 [2021-11-23 16:50:17,158 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:50:17,158 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 21 treesize of output 20 [2021-11-23 16:50:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:50:17,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:17,691 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_203 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_203) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-23 16:50:17,735 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_203 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_201 (_ BitVec 32))) (= (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_201)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_203) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:50:17,757 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_203 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_201 (_ BitVec 32))) (= (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_201)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_203) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:50:17,806 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-11-23 16:50:17,806 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 30 treesize of output 36 [2021-11-23 16:50:17,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:50:17,820 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 34 treesize of output 34 [2021-11-23 16:50:17,827 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 9 treesize of output 7 [2021-11-23 16:50:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2021-11-23 16:50:17,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:17,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339282789] [2021-11-23 16:50:17,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339282789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:17,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [116939201] [2021-11-23 16:50:17,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:50:17,911 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:17,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:17,915 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:17,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 16:50:18,099 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 16:50:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897630357] [2021-11-23 16:50:18,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:50:18,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:18,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:18,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 1 [2021-11-23 16:50:18,107 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:18,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 16:50:18,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 16:50:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:50:18,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 16:50:18,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:18,440 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 [2021-11-23 16:50:18,457 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 24 treesize of output 22 [2021-11-23 16:50:18,563 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 14 treesize of output 16 [2021-11-23 16:50:18,683 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 23 treesize of output 22 [2021-11-23 16:50:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:19,194 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 42 treesize of output 36 [2021-11-23 16:50:19,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:19,528 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 44 treesize of output 32 [2021-11-23 16:50:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:20,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:20,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:20,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2021-11-23 16:50:20,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:20,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:20,638 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 37 [2021-11-23 16:50:21,278 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 57 treesize of output 33 [2021-11-23 16:50:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:21,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:29,233 INFO L354 Elim1Store]: treesize reduction 16, result has 62.8 percent of original size [2021-11-23 16:50:29,234 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 648 treesize of output 406 [2021-11-23 16:50:57,161 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 16:50:57,162 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 303 treesize of output 1 [2021-11-23 16:50:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:57,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897630357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:57,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 16:50:57,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 23, 22] total 58 [2021-11-23 16:50:57,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124369801] [2021-11-23 16:50:57,184 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:57,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 16:50:57,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 16:50:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2600, Unknown=8, NotChecked=324, Total=3306 [2021-11-23 16:50:57,188 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 58 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 58 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) [2021-11-23 16:51:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:20,235 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2021-11-23 16:51:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 16:51:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 58 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 28 [2021-11-23 16:51:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:20,240 INFO L225 Difference]: With dead ends: 89 [2021-11-23 16:51:20,240 INFO L226 Difference]: Without dead ends: 87 [2021-11-23 16:51:20,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=761, Invalid=4790, Unknown=11, NotChecked=444, Total=6006 [2021-11-23 16:51:20,246 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:20,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 170 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 138 Invalid, 0 Unknown, 393 Unchecked, 1.7s Time] [2021-11-23 16:51:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-23 16:51:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2021-11-23 16:51:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 75 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-11-23 16:51:20,264 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 28 [2021-11-23 16:51:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:20,264 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-11-23 16:51:20,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 58 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) [2021-11-23 16:51:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-11-23 16:51:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 16:51:20,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:20,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:20,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-23 16:51:20,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:20,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:20,683 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1576080162, now seen corresponding path program 1 times [2021-11-23 16:51:20,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:20,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054243048] [2021-11-23 16:51:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:20,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:20,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:20,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:20,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:51:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:51:20,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:20,850 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 24 treesize of output 22 [2021-11-23 16:51:21,464 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 14 treesize of output 16 [2021-11-23 16:51:21,617 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 [2021-11-23 16:51:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:51:21,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:22,010 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_281 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_#t~mem11#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_281) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:51:22,046 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 18 treesize of output 14 [2021-11-23 16:51:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 1 not checked. [2021-11-23 16:51:22,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:22,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054243048] [2021-11-23 16:51:22,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054243048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:22,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [719119931] [2021-11-23 16:51:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:22,377 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:22,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:22,389 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:22,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 16:51:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:22,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:51:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:23,188 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 [2021-11-23 16:51:23,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:23,766 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 14 treesize of output 16 [2021-11-23 16:51:24,181 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 [2021-11-23 16:51:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:51:24,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:24,474 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_303 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_303) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) |c_ULTIMATE.start_main_#t~mem11#1|)) is different from false [2021-11-23 16:51:24,561 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_303 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_303) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:51:24,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:24,750 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 18 treesize of output 19 [2021-11-23 16:51:24,780 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 18 treesize of output 14 [2021-11-23 16:51:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 5 not checked. [2021-11-23 16:51:25,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [719119931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:25,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94780988] [2021-11-23 16:51:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:25,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:25,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:25,054 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:25,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 16:51:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:25,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:51:25,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:25,187 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 [2021-11-23 16:51:25,592 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 [2021-11-23 16:51:25,764 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 14 treesize of output 16 [2021-11-23 16:51:25,835 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 [2021-11-23 16:51:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:51:25,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:26,111 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_326 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_326) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) |c_ULTIMATE.start_main_#t~mem11#1|)) is different from false [2021-11-23 16:51:26,170 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_326 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_326) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:51:26,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:26,316 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 18 treesize of output 19 [2021-11-23 16:51:26,343 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 18 treesize of output 14 [2021-11-23 16:51:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 5 not checked. [2021-11-23 16:51:26,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94780988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:26,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:26,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 6, 7] total 14 [2021-11-23 16:51:26,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721867429] [2021-11-23 16:51:26,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:26,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 16:51:26,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:26,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 16:51:26,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=56, Unknown=5, NotChecked=90, Total=182 [2021-11-23 16:51:26,559 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:27,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:27,304 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-11-23 16:51:27,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:51:27,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-11-23 16:51:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:27,307 INFO L225 Difference]: With dead ends: 91 [2021-11-23 16:51:27,307 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 16:51:27,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=45, Invalid=80, Unknown=5, NotChecked=110, Total=240 [2021-11-23 16:51:27,308 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:27,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2021-11-23 16:51:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 16:51:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-23 16:51:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2375) internal successors, (99), 80 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2021-11-23 16:51:27,326 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 28 [2021-11-23 16:51:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:27,327 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2021-11-23 16:51:27,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2021-11-23 16:51:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 16:51:27,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:27,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:27,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-23 16:51:27,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:27,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:27,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:27,942 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:27,943 INFO L85 PathProgramCache]: Analyzing trace with hash 550852762, now seen corresponding path program 2 times [2021-11-23 16:51:27,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:27,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990417645] [2021-11-23 16:51:27,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:27,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:27,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:27,945 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:27,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:51:28,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:28,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:28,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:51:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:28,123 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 [2021-11-23 16:51:28,744 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 15 treesize of output 17 [2021-11-23 16:51:28,891 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 16 treesize of output 8 [2021-11-23 16:51:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:51:29,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:29,299 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_347 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_#t~mem11#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_347) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:51:29,333 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 18 treesize of output 14 [2021-11-23 16:51:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 1 not checked. [2021-11-23 16:51:29,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990417645] [2021-11-23 16:51:29,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990417645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [272880830] [2021-11-23 16:51:29,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:29,643 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:29,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:29,643 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:29,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 16:51:29,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:29,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:29,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:51:29,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:31,081 INFO L354 Elim1Store]: treesize reduction 26, result has 60.6 percent of original size [2021-11-23 16:51:31,081 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 25 treesize of output 49 [2021-11-23 16:51:31,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:31,720 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 15 treesize of output 17 [2021-11-23 16:51:32,109 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 16 treesize of output 8 [2021-11-23 16:51:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:51:32,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:32,402 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_369 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_#t~mem11#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_369) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:51:32,463 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_369 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_369) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:51:33,102 INFO L354 Elim1Store]: treesize reduction 33, result has 57.1 percent of original size [2021-11-23 16:51:33,102 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 56 [2021-11-23 16:51:33,274 INFO L354 Elim1Store]: treesize reduction 3, result has 80.0 percent of original size [2021-11-23 16:51:33,275 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 67 treesize of output 59 [2021-11-23 16:51:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 5 not checked. [2021-11-23 16:51:33,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [272880830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465310140] [2021-11-23 16:51:33,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:33,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:33,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:33,565 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:33,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 16:51:33,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:51:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:33,747 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 [2021-11-23 16:51:34,094 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 [2021-11-23 16:51:34,259 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 15 treesize of output 17 [2021-11-23 16:51:34,339 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 16 treesize of output 8 [2021-11-23 16:51:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:51:34,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:34,632 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_393 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_#t~mem11#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_393) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:51:34,692 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_393 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_393) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:51:34,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:34,824 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 18 treesize of output 19 [2021-11-23 16:51:34,846 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 18 treesize of output 14 [2021-11-23 16:51:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 5 not checked. [2021-11-23 16:51:35,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465310140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:35,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:35,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 6, 7] total 14 [2021-11-23 16:51:35,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195137768] [2021-11-23 16:51:35,091 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:35,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 16:51:35,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 16:51:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=56, Unknown=5, NotChecked=90, Total=182 [2021-11-23 16:51:35,093 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:35,893 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2021-11-23 16:51:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:51:35,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-11-23 16:51:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:35,896 INFO L225 Difference]: With dead ends: 92 [2021-11-23 16:51:35,896 INFO L226 Difference]: Without dead ends: 82 [2021-11-23 16:51:35,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=45, Invalid=80, Unknown=5, NotChecked=110, Total=240 [2021-11-23 16:51:35,898 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:35,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2021-11-23 16:51:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-23 16:51:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-23 16:51:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 81 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2021-11-23 16:51:35,914 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 28 [2021-11-23 16:51:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:35,914 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2021-11-23 16:51:35,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2021-11-23 16:51:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 16:51:35,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:35,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:35,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:36,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:36,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:36,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:36,531 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1969107172, now seen corresponding path program 2 times [2021-11-23 16:51:36,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:36,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916074633] [2021-11-23 16:51:36,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:36,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:36,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:36,533 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:36,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 16:51:36,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:36,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:51:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:37,200 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 [2021-11-23 16:51:37,409 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 [2021-11-23 16:51:37,749 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 23 treesize of output 22 [2021-11-23 16:51:38,832 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:51:38,832 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 30 treesize of output 32 [2021-11-23 16:51:40,910 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 16:51:40,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 46 [2021-11-23 16:51:42,271 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:51:42,271 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 1 case distinctions, treesize of input 51 treesize of output 35 [2021-11-23 16:51:43,718 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:51:43,719 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 43 treesize of output 15 [2021-11-23 16:51:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:51:44,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:56,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:51:56,673 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 16:51:56,673 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 25 treesize of output 1 [2021-11-23 16:51:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:51:56,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:56,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916074633] [2021-11-23 16:51:56,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916074633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:56,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1320705061] [2021-11-23 16:51:56,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:56,692 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:56,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:56,693 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:56,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 16:51:56,840 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 16:51:56,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419190332] [2021-11-23 16:51:56,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:56,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 1 [2021-11-23 16:51:56,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:56,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:56,858 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:56,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 16:51:56,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:56,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 16:51:56,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:57,237 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 [2021-11-23 16:51:57,445 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 [2021-11-23 16:51:58,197 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 23 treesize of output 22 [2021-11-23 16:51:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:59,749 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 35 treesize of output 37 [2021-11-23 16:52:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:52:02,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:52:02,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:52:02,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-23 16:52:04,628 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 43 treesize of output 33 [2021-11-23 16:52:06,700 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 29 treesize of output 13 [2021-11-23 16:52:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:52:07,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:52:13,795 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 16:52:13,796 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 23 treesize of output 1 [2021-11-23 16:52:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:52:13,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419190332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:13,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 16:52:13,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 16, 13] total 39 [2021-11-23 16:52:13,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112096656] [2021-11-23 16:52:13,817 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:13,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 16:52:13,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 16:52:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1267, Unknown=2, NotChecked=0, Total=1482 [2021-11-23 16:52:13,820 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:47,558 WARN L227 SmtUtils]: Spent 13.30s on a formula simplification. DAG size of input: 84 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:52:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:49,809 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2021-11-23 16:52:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 16:52:49,811 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 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 28 [2021-11-23 16:52:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:49,812 INFO L225 Difference]: With dead ends: 96 [2021-11-23 16:52:49,812 INFO L226 Difference]: Without dead ends: 83 [2021-11-23 16:52:49,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=368, Invalid=2281, Unknown=3, NotChecked=0, Total=2652 [2021-11-23 16:52:49,814 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:49,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 109 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 322 Invalid, 0 Unknown, 61 Unchecked, 5.9s Time] [2021-11-23 16:52:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-23 16:52:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-11-23 16:52:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-11-23 16:52:49,828 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 28 [2021-11-23 16:52:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:49,828 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-11-23 16:52:49,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-11-23 16:52:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 16:52:49,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:49,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:49,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:50,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:50,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:50,245 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:50,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:50,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1202810022, now seen corresponding path program 3 times [2021-11-23 16:52:50,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:50,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180220149] [2021-11-23 16:52:50,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:52:50,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:50,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:50,247 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:50,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:52:50,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:52:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:52:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:52:53,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:56,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:56,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180220149] [2021-11-23 16:52:56,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180220149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:56,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [280042682] [2021-11-23 16:52:56,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:52:56,384 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:56,391 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:56,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 16:52:56,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:52:56,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:56,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:52:56,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:52:57,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:53:01,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [280042682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80438408] [2021-11-23 16:53:01,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:53:01,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:01,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:01,227 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:01,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 16:53:01,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:53:01,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:53:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:53:01,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:53:02,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:53:06,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80438408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:06,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:06,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 11] total 36 [2021-11-23 16:53:06,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003784468] [2021-11-23 16:53:06,678 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:06,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 16:53:06,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:06,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 16:53:06,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 16:53:06,680 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:20,639 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-11-23 16:53:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 16:53:20,640 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 16:53:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:20,641 INFO L225 Difference]: With dead ends: 138 [2021-11-23 16:53:20,641 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 16:53:20,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=467, Invalid=2083, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 16:53:20,644 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 615 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:20,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 167 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 16:53:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 16:53:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2021-11-23 16:53:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-11-23 16:53:20,656 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 30 [2021-11-23 16:53:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:20,657 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-11-23 16:53:20,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-11-23 16:53:20,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 16:53:20,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:20,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:20,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-23 16:53:20,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:21,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:21,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:21,279 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash -736332014, now seen corresponding path program 1 times [2021-11-23 16:53:21,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:21,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825486105] [2021-11-23 16:53:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:21,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:21,282 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:21,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 16:53:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:21,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 16:53:21,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:21,479 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 [2021-11-23 16:53:21,913 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 [2021-11-23 16:53:22,265 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 [2021-11-23 16:53:22,362 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 [2021-11-23 16:53:22,929 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-23 16:53:22,930 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 24 [2021-11-23 16:53:23,275 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 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-23 16:53:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:53:24,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:26,763 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_561 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_561) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-23 16:53:26,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:53:26,949 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 [2021-11-23 16:53:27,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:53:27,041 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 [2021-11-23 16:53:27,067 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 [2021-11-23 16:53:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-23 16:53:27,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:28,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825486105] [2021-11-23 16:53:28,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825486105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:28,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1226398698] [2021-11-23 16:53:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:28,000 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:28,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:28,016 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:28,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 16:53:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:53:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:29,267 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 [2021-11-23 16:53:30,385 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:53:30,385 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 16 treesize of output 22 [2021-11-23 16:53:30,410 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 3 [2021-11-23 16:53:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:31,117 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 [2021-11-23 16:53:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:32,585 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 24 [2021-11-23 16:53:33,482 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 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-23 16:53:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:53:35,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:37,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_588 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_588) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-23 16:53:37,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:53:37,199 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 [2021-11-23 16:53:37,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:53:37,289 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 [2021-11-23 16:53:37,313 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 [2021-11-23 16:53:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-23 16:53:37,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1226398698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:37,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11488073] [2021-11-23 16:53:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:37,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:37,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:37,598 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:37,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 16:53:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 16:53:37,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:38,241 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 [2021-11-23 16:53:39,441 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 [2021-11-23 16:53:40,243 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 [2021-11-23 16:53:40,383 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 [2021-11-23 16:53:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:41,670 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 24 [2021-11-23 16:53:42,352 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 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-23 16:53:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:53:44,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:45,513 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_617) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-23 16:53:45,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:53:45,728 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 [2021-11-23 16:53:45,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:53:45,835 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 [2021-11-23 16:53:45,866 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 [2021-11-23 16:53:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-23 16:53:46,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11488073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:46,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:46,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12, 13, 13, 13] total 42 [2021-11-23 16:53:46,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937471299] [2021-11-23 16:53:46,138 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:46,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 16:53:46,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 16:53:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1324, Unknown=3, NotChecked=228, Total=1722 [2021-11-23 16:53:46,141 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:49,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:49,495 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-11-23 16:53:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 16:53:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 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 32 [2021-11-23 16:53:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:49,498 INFO L225 Difference]: With dead ends: 65 [2021-11-23 16:53:49,498 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 16:53:49,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=189, Invalid=1460, Unknown=3, NotChecked=240, Total=1892 [2021-11-23 16:53:49,500 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:49,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 255 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 183 Unchecked, 2.0s Time] [2021-11-23 16:53:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 16:53:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-23 16:53:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 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) [2021-11-23 16:53:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-23 16:53:49,508 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 32 [2021-11-23 16:53:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:49,509 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-23 16:53:49,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-23 16:53:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 16:53:49,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:49,511 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:49,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:49,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-23 16:53:49,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-23 16:53:50,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:50,115 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -143226682, now seen corresponding path program 4 times [2021-11-23 16:53:50,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:50,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544425874] [2021-11-23 16:53:50,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:53:50,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:50,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:50,117 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:50,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 16:53:50,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:53:50,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:53:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 16:53:50,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:50,346 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 [2021-11-23 16:53:50,563 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 15 treesize of output 11 [2021-11-23 16:53:51,172 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:53:51,172 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 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 16:53:51,618 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:53:51,619 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 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:53:51,948 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 14 treesize of output 16 [2021-11-23 16:53:52,093 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 14 treesize of output 16 [2021-11-23 16:53:52,193 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 14 treesize of output 16 [2021-11-23 16:53:52,804 INFO L354 Elim1Store]: treesize reduction 43, result has 6.5 percent of original size [2021-11-23 16:53:52,804 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 33 treesize of output 20 [2021-11-23 16:53:53,666 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-23 16:53:53,667 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 28 treesize of output 27 [2021-11-23 16:53:54,265 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:53:54,265 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 21 treesize of output 20 [2021-11-23 16:53:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:53:55,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:59,675 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_657) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:53:59,986 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_653 (_ BitVec 32)) (v_ArrVal_657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_653)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_657) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:00,098 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_653 (_ BitVec 32)) (v_ArrVal_657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_653)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_657) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:00,203 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_653 (_ BitVec 32)) (v_ArrVal_652 (_ BitVec 32)) (v_ArrVal_657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse0 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_652) (bvadd (_ bv4 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_653))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_657) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:00,307 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_653 (_ BitVec 32)) (v_ArrVal_652 (_ BitVec 32)) (v_ArrVal_657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse0 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_652) (bvadd (_ bv8 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_653))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_657) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-23 16:54:00,881 INFO L354 Elim1Store]: treesize reduction 132, result has 22.8 percent of original size [2021-11-23 16:54:00,882 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 3 case distinctions, treesize of input 38 treesize of output 49 [2021-11-23 16:54:00,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:54:00,989 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 34 treesize of output 34 [2021-11-23 16:54:01,018 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 9 treesize of output 7 [2021-11-23 16:54:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 14 not checked. [2021-11-23 16:54:01,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:01,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544425874] [2021-11-23 16:54:01,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544425874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:01,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [418596782] [2021-11-23 16:54:01,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:54:01,751 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:01,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:54:01,752 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:54:01,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-23 16:54:01,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:54:01,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:54:01,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 16:54:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:02,689 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 15 treesize of output 11 [2021-11-23 16:54:04,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:04,040 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 28 treesize of output 27 [2021-11-23 16:54:04,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:04,904 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 21 treesize of output 20 [2021-11-23 16:54:05,846 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:54:05,847 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 14 treesize of output 20 [2021-11-23 16:54:05,892 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 5 treesize of output 3 [2021-11-23 16:54:06,652 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:54:06,652 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 14 treesize of output 20 [2021-11-23 16:54:06,687 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 5 treesize of output 3 [2021-11-23 16:54:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:07,299 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 14 treesize of output 16 [2021-11-23 16:54:08,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:54:08,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:54:08,884 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 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-23 16:54:10,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:10,132 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 23 treesize of output 22 [2021-11-23 16:54:10,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:10,935 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 21 treesize of output 20 [2021-11-23 16:54:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:54:12,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:13,998 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_697) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-23 16:54:14,233 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_694 (_ BitVec 32))) (= (_ bv1 32) (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_694)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_697) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-23 16:54:14,298 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_694 (_ BitVec 32))) (= (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_694)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_697) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:14,367 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_694 (_ BitVec 32)) (v_ArrVal_692 (_ BitVec 32))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse0 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_692) (bvadd (_ bv4 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_694))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_697) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:14,433 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_694 (_ BitVec 32)) (v_ArrVal_692 (_ BitVec 32))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse0 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_692) (bvadd (_ bv8 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_694))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_697) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:14,839 INFO L354 Elim1Store]: treesize reduction 132, result has 22.8 percent of original size [2021-11-23 16:54:14,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 49 [2021-11-23 16:54:14,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:54:14,929 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 34 treesize of output 34 [2021-11-23 16:54:14,952 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 9 treesize of output 7 [2021-11-23 16:54:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 14 not checked. [2021-11-23 16:54:15,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [418596782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:15,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228139463] [2021-11-23 16:54:15,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:54:15,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:54:15,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:54:15,097 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:54:15,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 16:54:15,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:54:15,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:54:15,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 16:54:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:15,685 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 [2021-11-23 16:54:16,381 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 15 treesize of output 11 [2021-11-23 16:54:17,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:17,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 16:54:18,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:18,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:54:19,195 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 14 treesize of output 16 [2021-11-23 16:54:19,391 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 14 treesize of output 16 [2021-11-23 16:54:19,545 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 14 treesize of output 16 [2021-11-23 16:54:20,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:54:20,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:54:20,915 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 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-23 16:54:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:22,239 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 28 treesize of output 27 [2021-11-23 16:54:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:22,996 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 21 treesize of output 20 [2021-11-23 16:54:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:54:24,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:26,166 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_738 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_738) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:26,416 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_734 (_ BitVec 32)) (v_ArrVal_738 (Array (_ BitVec 32) (_ BitVec 32)))) (= (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_734)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_738) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:26,484 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_734 (_ BitVec 32)) (v_ArrVal_738 (Array (_ BitVec 32) (_ BitVec 32)))) (= (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_734)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_738) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:26,552 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_734 (_ BitVec 32)) (v_ArrVal_732 (_ BitVec 32)) (v_ArrVal_738 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse0 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_732) (bvadd (_ bv4 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_734))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_738) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:26,618 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_734 (_ BitVec 32)) (v_ArrVal_732 (_ BitVec 32)) (v_ArrVal_738 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse0 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_732) (bvadd (_ bv8 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_734))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_738) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 16:54:27,030 INFO L354 Elim1Store]: treesize reduction 132, result has 22.8 percent of original size [2021-11-23 16:54:27,030 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 3 case distinctions, treesize of input 38 treesize of output 49 [2021-11-23 16:54:27,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:54:27,123 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 34 treesize of output 34 [2021-11-23 16:54:27,147 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 9 treesize of output 7 [2021-11-23 16:54:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 14 not checked. [2021-11-23 16:54:27,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228139463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:27,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:54:27,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14, 17, 15, 17] total 60 [2021-11-23 16:54:27,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887823030] [2021-11-23 16:54:27,299 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:54:27,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 16:54:27,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:27,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 16:54:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1738, Unknown=15, NotChecked=1500, Total=3540 [2021-11-23 16:54:27,302 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 60 states, 60 states have (on average 2.25) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:33,159 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2021-11-23 16:54:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 16:54:33,160 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.25) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 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 35 [2021-11-23 16:54:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:33,161 INFO L225 Difference]: With dead ends: 79 [2021-11-23 16:54:33,161 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 16:54:33,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 136 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 15 IntricatePredicates, 4 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=373, Invalid=2324, Unknown=15, NotChecked=1710, Total=4422 [2021-11-23 16:54:33,164 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:33,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 144 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 254 Unchecked, 0.5s Time] [2021-11-23 16:54:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 16:54:33,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-11-23 16:54:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-11-23 16:54:33,180 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 35 [2021-11-23 16:54:33,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:33,180 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-11-23 16:54:33,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.25) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-11-23 16:54:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 16:54:33,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:33,183 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:33,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:33,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-23 16:54:33,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-23 16:54:33,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:33,798 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:33,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:33,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1631780680, now seen corresponding path program 3 times [2021-11-23 16:54:33,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:33,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927311310] [2021-11-23 16:54:33,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:54:33,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:33,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:33,800 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:33,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 16:54:33,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:54:33,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:54:33,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:54:33,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:34,020 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 [2021-11-23 16:54:34,741 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 14 treesize of output 16 [2021-11-23 16:54:35,052 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 14 treesize of output 16 [2021-11-23 16:54:35,208 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 [2021-11-23 16:54:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 16:54:35,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:35,604 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_773 (Array (_ BitVec 32) (_ BitVec 32)))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_773) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:54:35,716 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_773 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_#t~mem11#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_773) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:54:35,755 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 18 treesize of output 14 [2021-11-23 16:54:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 6 not checked. [2021-11-23 16:54:36,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:36,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927311310] [2021-11-23 16:54:36,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927311310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:36,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [92904575] [2021-11-23 16:54:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:54:36,168 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:36,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:54:36,172 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:54:36,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-23 16:54:36,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:54:36,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:54:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:54:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:37,375 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 [2021-11-23 16:54:38,071 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:54:38,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-23 16:54:38,122 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 5 treesize of output 3 [2021-11-23 16:54:38,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:38,810 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 14 treesize of output 16 [2021-11-23 16:54:39,215 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 [2021-11-23 16:54:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 16:54:39,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:39,513 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_802 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_802) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) c_~N~0)) is different from false [2021-11-23 16:54:39,628 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_802 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_802) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) |c_ULTIMATE.start_main_#t~mem11#1|)) is different from false [2021-11-23 16:54:39,689 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_802 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_802) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:54:39,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:54:39,826 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 18 treesize of output 19 [2021-11-23 16:54:39,850 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 18 treesize of output 14 [2021-11-23 16:54:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 12 not checked. [2021-11-23 16:54:40,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [92904575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:40,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114521305] [2021-11-23 16:54:40,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:54:40,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:54:40,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:54:40,218 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:54:40,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 16:54:40,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:54:40,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:54:40,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:54:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:40,407 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 [2021-11-23 16:54:40,851 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 [2021-11-23 16:54:41,015 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 14 treesize of output 16 [2021-11-23 16:54:41,192 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 14 treesize of output 16 [2021-11-23 16:54:41,265 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 [2021-11-23 16:54:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 16:54:41,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:41,553 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_832 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_832) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) c_~N~0)) is different from false [2021-11-23 16:54:41,661 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_832 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_832) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) |c_ULTIMATE.start_main_#t~mem11#1|)) is different from false [2021-11-23 16:54:41,722 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_832 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_832) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:54:41,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:54:41,861 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 18 treesize of output 19 [2021-11-23 16:54:41,885 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 18 treesize of output 14 [2021-11-23 16:54:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 12 not checked. [2021-11-23 16:54:42,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114521305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:42,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:54:42,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 8, 7, 8] total 19 [2021-11-23 16:54:42,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777756492] [2021-11-23 16:54:42,209 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:54:42,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 16:54:42,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 16:54:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=86, Unknown=8, NotChecked=200, Total=342 [2021-11-23 16:54:42,211 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 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) [2021-11-23 16:54:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:43,655 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-11-23 16:54:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:54:43,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 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 35 [2021-11-23 16:54:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:43,657 INFO L225 Difference]: With dead ends: 86 [2021-11-23 16:54:43,658 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 16:54:43,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 8 IntricatePredicates, 2 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=76, Invalid=130, Unknown=8, NotChecked=248, Total=462 [2021-11-23 16:54:43,659 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:43,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 159 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2021-11-23 16:54:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 16:54:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-23 16:54:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-11-23 16:54:43,670 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 35 [2021-11-23 16:54:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:43,670 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-11-23 16:54:43,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 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) [2021-11-23 16:54:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-11-23 16:54:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 16:54:43,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:43,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:43,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:43,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-23 16:54:44,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:44,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:44,277 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1123059706, now seen corresponding path program 4 times [2021-11-23 16:54:44,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:44,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065314057] [2021-11-23 16:54:44,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:54:44,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:44,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:44,279 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:44,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 16:54:44,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:54:44,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:54:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:54:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:44,478 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 26 treesize of output 24 [2021-11-23 16:54:45,237 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 15 treesize of output 17 [2021-11-23 16:54:45,525 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 15 treesize of output 17 [2021-11-23 16:54:45,681 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 16 treesize of output 8 [2021-11-23 16:54:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 16:54:45,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:46,083 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_861 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_861) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) c_~N~0))) is different from false [2021-11-23 16:54:46,204 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_861 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_861) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) |c_ULTIMATE.start_main_#t~mem11#1|)) is different from false [2021-11-23 16:54:46,267 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 18 treesize of output 14 [2021-11-23 16:54:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 6 not checked. [2021-11-23 16:54:46,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065314057] [2021-11-23 16:54:46,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065314057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [446670518] [2021-11-23 16:54:46,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:54:46,743 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:46,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:54:46,747 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:54:46,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 16:54:46,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:54:46,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:54:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:54:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:48,437 INFO L354 Elim1Store]: treesize reduction 26, result has 60.6 percent of original size [2021-11-23 16:54:48,438 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 25 treesize of output 49 [2021-11-23 16:54:48,844 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 6 treesize of output 5 [2021-11-23 16:54:49,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:54:49,295 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 15 treesize of output 17 [2021-11-23 16:54:49,696 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 16 treesize of output 8 [2021-11-23 16:54:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 16:54:49,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:49,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_890 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_890) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) |c_ULTIMATE.start_main_#t~mem11#1|)) is different from false [2021-11-23 16:54:50,062 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_890 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_890) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:54:50,149 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_890 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_889 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_890) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_889) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:54:50,817 INFO L354 Elim1Store]: treesize reduction 33, result has 57.1 percent of original size [2021-11-23 16:54:50,817 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 61 [2021-11-23 16:54:50,989 INFO L354 Elim1Store]: treesize reduction 3, result has 80.0 percent of original size [2021-11-23 16:54:50,989 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 103 treesize of output 91 [2021-11-23 16:54:51,038 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 9 [2021-11-23 16:54:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 12 not checked. [2021-11-23 16:54:51,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [446670518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:51,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989990715] [2021-11-23 16:54:51,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:54:51,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:54:51,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:54:51,505 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:54:51,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 16:54:51,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:54:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:54:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:54:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:51,730 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 [2021-11-23 16:54:52,385 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 15 treesize of output 17 [2021-11-23 16:54:52,455 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 16 treesize of output 8 [2021-11-23 16:54:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 16:54:52,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:52,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_918 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_#t~mem11#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_918) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 16:54:52,765 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 18 treesize of output 14 [2021-11-23 16:54:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 2 not checked. [2021-11-23 16:54:53,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989990715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:53,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:54:53,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6, 8, 6, 6] total 16 [2021-11-23 16:54:53,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171347793] [2021-11-23 16:54:53,224 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:54:53,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:54:53,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:54:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=71, Unknown=6, NotChecked=126, Total=240 [2021-11-23 16:54:53,226 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:55,063 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-11-23 16:54:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:54:55,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 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 35 [2021-11-23 16:54:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:55,064 INFO L225 Difference]: With dead ends: 94 [2021-11-23 16:54:55,064 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 16:54:55,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=71, Invalid=129, Unknown=6, NotChecked=174, Total=380 [2021-11-23 16:54:55,065 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:55,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 158 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2021-11-23 16:54:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 16:54:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-11-23 16:54:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2021-11-23 16:54:55,080 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 35 [2021-11-23 16:54:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:55,081 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2021-11-23 16:54:55,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2021-11-23 16:54:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 16:54:55,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:55,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:55,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:55,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:55,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:55,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:55,691 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash 651947656, now seen corresponding path program 4 times [2021-11-23 16:54:55,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510828289] [2021-11-23 16:54:55,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:54:55,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:55,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:55,693 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:55,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 16:54:55,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:54:55,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:54:55,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 16:54:55,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:56,466 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 20 treesize of output 18 [2021-11-23 16:54:56,621 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 [2021-11-23 16:54:56,992 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 23 treesize of output 22 [2021-11-23 16:54:57,806 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:54:57,807 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 30 treesize of output 32 [2021-11-23 16:54:59,113 INFO L354 Elim1Store]: treesize reduction 76, result has 20.8 percent of original size [2021-11-23 16:54:59,113 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 42 treesize of output 47 [2021-11-23 16:55:01,459 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-23 16:55:01,459 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 58 treesize of output 58 [2021-11-23 16:55:02,952 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-23 16:55:02,952 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 62 treesize of output 58 [2021-11-23 16:55:04,363 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 16:55:04,363 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 3 case distinctions, treesize of input 64 treesize of output 49 [2021-11-23 16:55:06,048 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 16:55:06,049 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 3 case distinctions, treesize of input 48 treesize of output 18 [2021-11-23 16:55:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:55:06,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:53,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:55:53,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 16:55:53,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-11-23 16:55:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:55:53,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:53,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510828289] [2021-11-23 16:55:53,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510828289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:53,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [746165070] [2021-11-23 16:55:53,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:55:53,180 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:55:53,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:55:53,181 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:55:53,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-23 16:55:53,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:55:53,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:55:53,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 16:55:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:54,324 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 [2021-11-23 16:55:55,782 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-23 16:55:55,782 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 23 treesize of output 34 [2021-11-23 16:55:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:55:58,592 INFO L354 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2021-11-23 16:55:58,592 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 35 treesize of output 49 [2021-11-23 16:56:01,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:01,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:01,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:01,589 INFO L354 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2021-11-23 16:56:01,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2021-11-23 16:56:08,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:08,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:08,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:08,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:09,672 INFO L354 Elim1Store]: treesize reduction 156, result has 30.4 percent of original size [2021-11-23 16:56:09,672 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 14 case distinctions, treesize of input 58 treesize of output 89 [2021-11-23 16:56:12,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:12,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:12,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:13,781 INFO L354 Elim1Store]: treesize reduction 233, result has 21.5 percent of original size [2021-11-23 16:56:13,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 67 treesize of output 85 [2021-11-23 16:56:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:16,834 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 [2021-11-23 16:56:19,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:19,580 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 42 treesize of output 18 [2021-11-23 16:56:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:56:19,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:36,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,128 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 16:56:36,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-11-23 16:56:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:56:36,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [746165070] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676032412] [2021-11-23 16:56:36,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:56:36,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:36,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:36,160 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:56:36,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 16:56:36,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:56:36,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:56:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 16:56:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:36,639 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 [2021-11-23 16:56:36,736 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 [2021-11-23 16:56:37,919 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 23 treesize of output 22 [2021-11-23 16:56:40,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:40,282 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 30 treesize of output 32 [2021-11-23 16:56:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:42,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:42,824 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 39 treesize of output 44 [2021-11-23 16:56:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:50,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:50,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:50,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 16:56:52,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:52,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:52,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:52,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-11-23 16:56:55,260 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 [2021-11-23 16:56:58,372 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 47 treesize of output 19 [2021-11-23 16:56:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:56:59,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:02,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:02,324 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 16:57:02,324 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 26 treesize of output 1 [2021-11-23 16:57:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:57:02,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676032412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:02,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:57:02,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18, 17, 20, 17] total 66 [2021-11-23 16:57:02,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504108276] [2021-11-23 16:57:02,345 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:57:02,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-23 16:57:02,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:02,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-23 16:57:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=3801, Unknown=12, NotChecked=0, Total=4290 [2021-11-23 16:57:02,349 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 66 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 66 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:23,578 WARN L227 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 65 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:57:37,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:57:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:38,778 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-23 16:57:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 16:57:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 66 states have internal predecessors, (93), 0 states have call successors, (0), 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 35 [2021-11-23 16:57:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:38,782 INFO L225 Difference]: With dead ends: 98 [2021-11-23 16:57:38,782 INFO L226 Difference]: Without dead ends: 83 [2021-11-23 16:57:38,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2056 ImplicationChecksByTransitivity, 125.7s TimeCoverageRelationStatistics Valid=607, Invalid=5233, Unknown=12, NotChecked=0, Total=5852 [2021-11-23 16:57:38,785 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:38,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 95 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 240 Invalid, 0 Unknown, 51 Unchecked, 10.8s Time] [2021-11-23 16:57:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-23 16:57:38,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-11-23 16:57:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1625) internal successors, (93), 80 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-11-23 16:57:38,798 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 35 [2021-11-23 16:57:38,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:38,798 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-11-23 16:57:38,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 66 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-11-23 16:57:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 16:57:38,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:38,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:57:38,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:39,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-11-23 16:57:39,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:39,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:39,401 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:57:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1989187722, now seen corresponding path program 5 times [2021-11-23 16:57:39,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:39,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267938318] [2021-11-23 16:57:39,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:57:39,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:39,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:39,403 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:39,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 16:57:39,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 16:57:39,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:57:39,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 16:57:39,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:44,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 16:57:48,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267938318] [2021-11-23 16:57:48,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267938318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931910829] [2021-11-23 16:57:48,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:57:48,761 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:48,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:48,763 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:48,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-23 16:57:49,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 16:57:49,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:57:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:57:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:57:54,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:57:59,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1931910829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:59,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518128388] [2021-11-23 16:57:59,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:57:59,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:59,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:59,334 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:59,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 16:57:59,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 16:57:59,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:57:59,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:57:59,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:58:01,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:58:02,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518128388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:02,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:58:02,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12, 11, 13, 11] total 47 [2021-11-23 16:58:02,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116484753] [2021-11-23 16:58:02,696 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:58:02,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 16:58:02,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 16:58:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 16:58:02,698 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:25,741 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2021-11-23 16:58:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 16:58:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 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 37 [2021-11-23 16:58:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:25,743 INFO L225 Difference]: With dead ends: 171 [2021-11-23 16:58:25,743 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 16:58:25,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 16:58:25,746 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 494 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:25,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 380 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2021-11-23 16:58:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 16:58:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2021-11-23 16:58:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2021-11-23 16:58:25,756 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 37 [2021-11-23 16:58:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:25,756 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2021-11-23 16:58:25,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2021-11-23 16:58:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 16:58:25,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:25,757 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:58:25,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:25,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-11-23 16:58:26,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:26,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:58:26,358 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:58:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash -590527364, now seen corresponding path program 2 times [2021-11-23 16:58:26,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:26,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297048306] [2021-11-23 16:58:26,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:58:26,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:26,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:26,360 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:26,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 16:58:26,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:58:26,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:58:26,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 16:58:26,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:26,630 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 26 treesize of output 24 [2021-11-23 16:58:26,927 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 15 treesize of output 11 [2021-11-23 16:58:27,483 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-23 16:58:27,484 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 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 16:58:28,337 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-23 16:58:28,337 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 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 16:58:29,134 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 23 treesize of output 23 [2021-11-23 16:58:29,335 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 23 treesize of output 23 [2021-11-23 16:58:29,497 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 23 treesize of output 23 [2021-11-23 16:58:30,461 INFO L354 Elim1Store]: treesize reduction 98, result has 11.7 percent of original size [2021-11-23 16:58:30,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 32 [2021-11-23 16:58:31,442 INFO L354 Elim1Store]: treesize reduction 125, result has 11.3 percent of original size [2021-11-23 16:58:31,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 35 [2021-11-23 16:58:32,503 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-23 16:58:32,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 16:58:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:58:34,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:39,708 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1154 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1160 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (store (let ((.cse0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1154) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (store .cse0 .cse1 (bvadd (select .cse0 .cse1) (_ bv4294967295 32)))) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1160) .cse1)) (_ bv0 32))) is different from false [2021-11-23 16:58:39,959 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1154 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1160 (_ BitVec 32)) (v_ArrVal_1151 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (store (let ((.cse0 (let ((.cse2 (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1151)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1154) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv4294967295 32)))))) (store .cse0 .cse1 (bvadd (_ bv4294967295 32) (select .cse0 .cse1)))) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1160) .cse1)) (_ bv0 32))) is different from false [2021-11-23 16:58:40,026 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1154 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1160 (_ BitVec 32)) (v_ArrVal_1151 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (store (let ((.cse0 (let ((.cse2 (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1151)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1154) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (store .cse0 .cse1 (bvadd (_ bv4294967295 32) (select .cse0 .cse1)))) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1160) .cse1)) (_ bv0 32))) is different from false [2021-11-23 16:58:42,309 INFO L354 Elim1Store]: treesize reduction 132, result has 22.8 percent of original size [2021-11-23 16:58:42,309 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 3 case distinctions, treesize of input 169 treesize of output 96 [2021-11-23 16:58:42,333 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 117 treesize of output 105 [2021-11-23 16:58:42,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:42,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:42,686 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-11-23 16:58:42,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 16:58:42,736 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:58:42,737 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 55 treesize of output 49 [2021-11-23 16:58:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 13 not checked. [2021-11-23 16:58:43,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:43,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297048306] [2021-11-23 16:58:43,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297048306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:43,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1787008485] [2021-11-23 16:58:43,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:58:43,476 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:43,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:58:43,476 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:58:43,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-23 16:58:43,670 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 16:58:43,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253091134] [2021-11-23 16:58:43,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:58:43,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:58:43,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:43,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 1 [2021-11-23 16:58:43,681 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:58:43,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-23 16:58:43,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:58:43,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:58:43,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 16:58:43,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:44,389 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 [2021-11-23 16:58:45,693 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 15 treesize of output 11 [2021-11-23 16:58:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:46,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 16:58:47,786 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 [2021-11-23 16:58:47,942 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 [2021-11-23 16:58:48,100 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 [2021-11-23 16:58:49,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:49,482 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 24 [2021-11-23 16:58:50,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:50,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:58:50,249 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 1 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 16:58:51,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:51,587 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 23 treesize of output 22 [2021-11-23 16:58:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:58:53,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:56,174 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1160 (_ BitVec 32)) (v_ArrVal_1218 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (store (let ((.cse0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1218) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (store .cse0 .cse1 (bvadd (select .cse0 .cse1) (_ bv4294967295 32)))) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1160) .cse1)) (_ bv0 32))) is different from false [2021-11-23 16:58:56,508 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (_ BitVec 32)) (v_ArrVal_1160 (_ BitVec 32)) (v_ArrVal_1218 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (store (let ((.cse0 (let ((.cse2 (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1215)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1218) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (store .cse0 .cse1 (bvadd (select .cse0 .cse1) (_ bv4294967295 32)))) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1160) .cse1)) (_ bv0 32))) is different from false [2021-11-23 16:58:56,571 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (_ BitVec 32)) (v_ArrVal_1160 (_ BitVec 32)) (v_ArrVal_1218 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (store (let ((.cse0 (let ((.cse2 (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1215)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1218) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv4294967295 32)))))) (store .cse0 .cse1 (bvadd (select .cse0 .cse1) (_ bv4294967295 32)))) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1160) .cse1)) (_ bv0 32))) is different from false [2021-11-23 16:58:56,807 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-11-23 16:58:56,808 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 137 treesize of output 83 [2021-11-23 16:58:56,830 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 104 treesize of output 94 [2021-11-23 16:58:56,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:56,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:56,857 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 13 treesize of output 9 [2021-11-23 16:58:57,193 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-11-23 16:58:57,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 75 [2021-11-23 16:58:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 13 not checked. [2021-11-23 16:58:58,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253091134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:58,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 16:58:58,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16, 17] total 53 [2021-11-23 16:58:58,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917275236] [2021-11-23 16:58:58,608 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 16:58:58,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 16:58:58,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:58,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 16:58:58,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1931, Unknown=18, NotChecked=570, Total=2756 [2021-11-23 16:58:58,611 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:05,530 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1160 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (store (let ((.cse0 (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (store .cse0 .cse1 (bvadd (_ bv4294967295 32) (select .cse0 .cse1)))) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1160) .cse1)) (_ bv0 32))) (forall ((v_ArrVal_1154 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1160 (_ BitVec 32))) (= (let ((.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (store (let ((.cse3 (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1154) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (store .cse3 .cse4 (bvadd (select .cse3 .cse4) (_ bv4294967295 32)))) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1160) .cse4)) (_ bv0 32)))) is different from false [2021-11-23 16:59:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:13,850 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2021-11-23 16:59:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 16:59:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 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 39 [2021-11-23 16:59:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:13,853 INFO L225 Difference]: With dead ends: 115 [2021-11-23 16:59:13,853 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 16:59:13,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=496, Invalid=4203, Unknown=21, NotChecked=980, Total=5700 [2021-11-23 16:59:13,857 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:13,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 168 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 212 Invalid, 0 Unknown, 412 Unchecked, 2.4s Time] [2021-11-23 16:59:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 16:59:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2021-11-23 16:59:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-11-23 16:59:13,874 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 39 [2021-11-23 16:59:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:13,874 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-11-23 16:59:13,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-11-23 16:59:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 16:59:13,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:13,875 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:59:13,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:14,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:14,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:59:14,276 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1261480172, now seen corresponding path program 5 times [2021-11-23 16:59:14,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:14,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141773897] [2021-11-23 16:59:14,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:59:14,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:14,278 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:14,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 16:59:14,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 16:59:14,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:59:14,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 16:59:14,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:14,668 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 [2021-11-23 16:59:15,017 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 15 treesize of output 11 [2021-11-23 16:59:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:15,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 16:59:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:16,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:16,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-23 16:59:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:16,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:16,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:16,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 16:59:17,545 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 23 treesize of output 23 [2021-11-23 16:59:17,764 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 23 treesize of output 23 [2021-11-23 16:59:17,988 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 23 treesize of output 23 [2021-11-23 16:59:18,187 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 23 treesize of output 23 [2021-11-23 16:59:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:19,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:59:19,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:59:19,146 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 42 treesize of output 41 [2021-11-23 16:59:20,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:59:20,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:20,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:59:20,067 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 37 treesize of output 39 [2021-11-23 16:59:20,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:20,940 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 23 treesize of output 22 [2021-11-23 16:59:21,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:21,550 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 21 treesize of output 20 [2021-11-23 16:59:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 16:59:22,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:30,350 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 16:59:30,661 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1264 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1264)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 16:59:30,725 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1264 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1264)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 16:59:30,787 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1262 (_ BitVec 32)) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1264 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (_ bv0 32) (select (store (store (store (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1262) (bvadd (_ bv4 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1264))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv4294967295 32)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-23 16:59:30,851 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1262 (_ BitVec 32)) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1264 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (_ bv0 32) (select (store (store (store (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1262) (bvadd (_ bv8 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1264))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv4294967295 32)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-23 16:59:30,925 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1262 (_ BitVec 32)) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1264 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (bvadd (_ bv4 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1262) (bvadd (_ bv8 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1264))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 16:59:30,993 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1262 (_ BitVec 32)) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1264 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (bvadd (_ bv8 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1262) (bvadd .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1264))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 16:59:31,588 INFO L354 Elim1Store]: treesize reduction 293, result has 15.1 percent of original size [2021-11-23 16:59:31,589 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 4 case distinctions, treesize of input 109 treesize of output 89 [2021-11-23 16:59:31,613 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 93 treesize of output 85 [2021-11-23 16:59:31,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:59:31,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:59:31,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:59:31,644 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 9 [2021-11-23 16:59:31,973 INFO L354 Elim1Store]: treesize reduction 20, result has 53.5 percent of original size [2021-11-23 16:59:31,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 293 treesize of output 298 [2021-11-23 16:59:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 23 not checked. [2021-11-23 16:59:32,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:32,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141773897] [2021-11-23 16:59:32,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141773897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:32,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1409688271] [2021-11-23 16:59:32,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:59:32,901 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:32,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:59:32,902 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:59:32,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-23 16:59:34,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 16:59:34,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:59:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 16:59:34,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:34,665 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 15 treesize of output 11 [2021-11-23 16:59:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:35,812 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 23 treesize of output 22 [2021-11-23 16:59:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:36,492 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 23 treesize of output 22 [2021-11-23 16:59:37,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:37,199 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 21 treesize of output 20 [2021-11-23 16:59:38,185 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:59:38,186 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 14 treesize of output 20 [2021-11-23 16:59:38,232 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 5 treesize of output 3 [2021-11-23 16:59:39,104 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:59:39,105 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 18 treesize of output 24 [2021-11-23 16:59:39,522 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:59:39,523 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 18 treesize of output 24 [2021-11-23 16:59:39,994 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 16:59:39,994 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 23 treesize of output 26 [2021-11-23 16:59:41,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:59:42,072 INFO L354 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2021-11-23 16:59:42,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 55 [2021-11-23 16:59:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:45,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:59:45,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 16:59:45,180 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 58 treesize of output 51 [2021-11-23 16:59:47,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:47,564 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 28 treesize of output 27 [2021-11-23 16:59:47,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:47,965 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 21 treesize of output 20 [2021-11-23 16:59:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:59:48,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:03,702 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1319 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1324 (_ BitVec 32)) (v_ArrVal_1326 (_ BitVec 32)) (|ULTIMATE.start_main_~#sum~0#1.base| (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (let ((.cse2 (store |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1319))) (let ((.cse3 (let ((.cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv4294967295 32)))))) (let ((.cse1 (store .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1324)) (.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (or (not (= .cse0 (select v_ArrVal_1319 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (= (select (store (store .cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1326) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32)) (not (= (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse0))))))) is different from false [2021-11-23 17:00:04,716 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1319 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1324 (_ BitVec 32)) (v_ArrVal_1316 (_ BitVec 32)) (v_ArrVal_1326 (_ BitVec 32)) (|ULTIMATE.start_main_~#sum~0#1.base| (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (let ((.cse1 (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1316)) |ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1319))) (let ((.cse3 (let ((.cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (let ((.cse2 (store .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1324)) (.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (or (not (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (= (select (store (store .cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1326) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32)) (not (= .cse0 (select v_ArrVal_1319 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))))) is different from false [2021-11-23 17:00:05,252 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1319 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1324 (_ BitVec 32)) (v_ArrVal_1316 (_ BitVec 32)) (v_ArrVal_1326 (_ BitVec 32)) (|ULTIMATE.start_main_~#sum~0#1.base| (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (let ((.cse2 (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1316)) |ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1319))) (let ((.cse3 (let ((.cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (let ((.cse0 (store .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1324)) (.cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (or (= (select (store (store .cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1326) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32)) (not (= .cse1 (select v_ArrVal_1319 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (not (= (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse1))))))) is different from false [2021-11-23 17:00:05,855 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1319 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1313 (_ BitVec 32)) (v_ArrVal_1324 (_ BitVec 32)) (v_ArrVal_1316 (_ BitVec 32)) (v_ArrVal_1326 (_ BitVec 32)) (|ULTIMATE.start_main_~#sum~0#1.base| (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1313) (bvadd (_ bv4 32) .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1316))) |ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1319))) (let ((.cse3 (let ((.cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv4294967295 32)))))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (store .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1324))) (or (not (= (select v_ArrVal_1319 |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse0)) (not (= (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse0)) (= (select (store (store .cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1326) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))))))) is different from false [2021-11-23 17:00:06,304 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1319 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1313 (_ BitVec 32)) (v_ArrVal_1324 (_ BitVec 32)) (v_ArrVal_1316 (_ BitVec 32)) (v_ArrVal_1326 (_ BitVec 32)) (|ULTIMATE.start_main_~#sum~0#1.base| (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1313) (bvadd (_ bv8 32) .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1316))) |ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1319))) (let ((.cse3 (let ((.cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (store .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1324))) (or (not (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (not (= .cse0 (select v_ArrVal_1319 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (= (select (store (store .cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1326) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))))))) is different from false [2021-11-23 17:00:06,910 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1312 (_ BitVec 32)) (v_ArrVal_1319 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1313 (_ BitVec 32)) (v_ArrVal_1324 (_ BitVec 32)) (v_ArrVal_1316 (_ BitVec 32)) (v_ArrVal_1326 (_ BitVec 32)) (|ULTIMATE.start_main_~#sum~0#1.base| (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1312) (bvadd (_ bv4 32) .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1313) (bvadd (_ bv8 32) .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1316))) |ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1319))) (let ((.cse3 (let ((.cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (let ((.cse0 (store .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1324)) (.cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (or (= (select (store (store .cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1326) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32)) (not (= .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (not (= .cse1 (select v_ArrVal_1319 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))))) is different from false [2021-11-23 17:00:07,509 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1312 (_ BitVec 32)) (v_ArrVal_1319 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1313 (_ BitVec 32)) (v_ArrVal_1324 (_ BitVec 32)) (v_ArrVal_1316 (_ BitVec 32)) (v_ArrVal_1326 (_ BitVec 32)) (|ULTIMATE.start_main_~#sum~0#1.base| (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1312) (bvadd (_ bv8 32) .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1313) (bvadd .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1316))) |ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1319))) (let ((.cse3 (let ((.cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (let ((.cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse0 (store .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1324))) (or (= (select (store (store .cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1326) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32)) (not (= .cse1 (select v_ArrVal_1319 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (not (= .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))))) is different from false [2021-11-23 17:00:08,204 INFO L354 Elim1Store]: treesize reduction 293, result has 15.1 percent of original size [2021-11-23 17:00:08,204 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 4 case distinctions, treesize of input 530 treesize of output 185 [2021-11-23 17:00:08,248 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 350 treesize of output 324 [2021-11-23 17:00:08,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:08,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:08,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:08,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:08,349 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 169 treesize of output 155 [2021-11-23 17:00:08,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:08,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:08,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:08,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:08,469 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 23 treesize of output 27 [2021-11-23 17:00:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 20 not checked. [2021-11-23 17:00:09,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1409688271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:09,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231712903] [2021-11-23 17:00:09,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:00:09,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:00:09,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:00:09,677 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:00:09,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-23 17:00:13,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 17:00:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:00:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 17:00:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:14,467 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 [2021-11-23 17:00:14,659 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 15 treesize of output 11 [2021-11-23 17:00:14,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:14,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:00:15,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:15,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:00:16,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:16,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:00:17,976 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 14 treesize of output 16 [2021-11-23 17:00:18,158 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 14 treesize of output 16 [2021-11-23 17:00:18,274 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 14 treesize of output 16 [2021-11-23 17:00:18,443 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 14 treesize of output 16 [2021-11-23 17:00:20,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:20,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:20,263 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 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-23 17:00:20,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:20,682 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 28 treesize of output 27 [2021-11-23 17:00:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:21,116 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 23 treesize of output 22 [2021-11-23 17:00:21,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:21,364 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 21 treesize of output 20 [2021-11-23 17:00:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:00:21,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:24,897 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1373 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1373) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv4294967295 32)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 17:00:25,224 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (_ BitVec 32)) (v_ArrVal_1373 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1369)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1373) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 17:00:25,317 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (_ BitVec 32)) (v_ArrVal_1373 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1369)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1373) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 17:00:25,409 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1367 (_ BitVec 32)) (v_ArrVal_1369 (_ BitVec 32)) (v_ArrVal_1373 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1367) (bvadd (_ bv4 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1369))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1373) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 17:00:25,528 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1367 (_ BitVec 32)) (v_ArrVal_1369 (_ BitVec 32)) (v_ArrVal_1373 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1367) (bvadd (_ bv8 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1369))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1373) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 17:00:25,623 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1367 (_ BitVec 32)) (v_ArrVal_1369 (_ BitVec 32)) (v_ArrVal_1373 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1365 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1365) (bvadd (_ bv4 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1367) (bvadd (_ bv8 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1369))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1373) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 17:00:25,718 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1367 (_ BitVec 32)) (v_ArrVal_1369 (_ BitVec 32)) (v_ArrVal_1373 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1365 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1365) (bvadd (_ bv8 32) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1367) (bvadd .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1369))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1373) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) is different from false [2021-11-23 17:00:26,357 INFO L354 Elim1Store]: treesize reduction 293, result has 15.1 percent of original size [2021-11-23 17:00:26,357 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 4 case distinctions, treesize of input 109 treesize of output 89 [2021-11-23 17:00:26,380 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 80 treesize of output 74 [2021-11-23 17:00:26,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:26,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:26,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:26,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:26,473 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 23 treesize of output 27 [2021-11-23 17:00:26,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:26,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:26,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:26,499 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 9 [2021-11-23 17:00:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 23 not checked. [2021-11-23 17:00:27,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231712903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:27,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:00:27,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 22, 25, 17, 21] total 85 [2021-11-23 17:00:27,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490021456] [2021-11-23 17:00:27,390 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:00:27,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-23 17:00:27,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-23 17:00:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=3594, Unknown=31, NotChecked=3024, Total=7140 [2021-11-23 17:00:27,393 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 85 states, 85 states have (on average 1.8470588235294119) internal successors, (157), 85 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:35,225 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (forall ((v_ArrVal_1269 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (_ bv4294967295 32) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) (= (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32)) (forall ((v_ArrVal_1319 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1324 (_ BitVec 32)) (v_ArrVal_1326 (_ BitVec 32)) (|ULTIMATE.start_main_~#sum~0#1.base| (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (let ((.cse4 (store |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1319))) (let ((.cse5 (let ((.cse6 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv4294967295 32)))))) (let ((.cse3 (store .cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1324)) (.cse2 (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (or (not (= .cse2 (select v_ArrVal_1319 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (= (select (store (store .cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1326) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32)) (not (= (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse2))))))) (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (= (_ bv0 32) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (forall ((v_ArrVal_1373 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1273 (_ BitVec 32)) (v_ArrVal_1275 (_ BitVec 32)) (v_ArrVal_1277 (_ BitVec 32))) (= (select (store (store (store (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1373) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| (bvadd (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv4294967295 32)))) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1273) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1275) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_1277) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv0 32))) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)))) is different from false [2021-11-23 17:00:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:49,568 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-11-23 17:00:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 17:00:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.8470588235294119) internal successors, (157), 85 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 17:00:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:49,570 INFO L225 Difference]: With dead ends: 136 [2021-11-23 17:00:49,570 INFO L226 Difference]: Without dead ends: 134 [2021-11-23 17:00:49,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 105 ConstructedPredicates, 22 IntricatePredicates, 3 DeprecatedPredicates, 2692 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=871, Invalid=6325, Unknown=32, NotChecked=4114, Total=11342 [2021-11-23 17:00:49,571 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1045 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:49,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 228 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 398 Invalid, 0 Unknown, 1045 Unchecked, 4.5s Time] [2021-11-23 17:00:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-23 17:00:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2021-11-23 17:00:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2021-11-23 17:00:49,592 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 42 [2021-11-23 17:00:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:49,592 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2021-11-23 17:00:49,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.8470588235294119) internal successors, (157), 85 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:49,593 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2021-11-23 17:00:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 17:00:49,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:49,594 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:49,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:49,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:50,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:50,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:50,209 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:50,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1487374188, now seen corresponding path program 6 times [2021-11-23 17:00:50,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:50,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112798739] [2021-11-23 17:00:50,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:00:50,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:50,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:50,212 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:50,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 17:00:50,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 17:00:50,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:00:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 17:00:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:51,090 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 [2021-11-23 17:00:51,157 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 [2021-11-23 17:00:51,567 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 23 treesize of output 22 [2021-11-23 17:00:52,459 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:00:52,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 17:00:53,657 INFO L354 Elim1Store]: treesize reduction 76, result has 20.8 percent of original size [2021-11-23 17:00:53,658 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 42 treesize of output 47 [2021-11-23 17:00:55,084 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-11-23 17:00:55,085 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 6 case distinctions, treesize of input 48 treesize of output 56 [2021-11-23 17:00:57,798 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-23 17:00:57,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 70 [2021-11-23 17:00:59,380 INFO L354 Elim1Store]: treesize reduction 195, result has 0.5 percent of original size [2021-11-23 17:00:59,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 82 [2021-11-23 17:01:01,559 INFO L354 Elim1Store]: treesize reduction 288, result has 0.3 percent of original size [2021-11-23 17:01:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 87 treesize of output 96 [2021-11-23 17:01:03,374 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 17:01:03,375 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 84 treesize of output 62 [2021-11-23 17:01:06,119 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 17:01:06,120 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 6 case distinctions, treesize of input 80 treesize of output 26 [2021-11-23 17:01:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:09,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:38,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:03:38,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:03:38,540 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 35 treesize of output 1 [2021-11-23 17:03:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:38,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112798739] [2021-11-23 17:03:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112798739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1179534056] [2021-11-23 17:03:38,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:03:38,559 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:38,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:38,561 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:38,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-23 17:03:38,797 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:03:38,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220883595] [2021-11-23 17:03:38,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:03:38,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:38,799 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:38,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-23 17:03:38,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9ecc71b-6dc5-4521-b8ec-8e1e659f6ffe/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 1 [2021-11-23 17:03:39,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 17:03:39,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 17:03:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:39,310 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 [2021-11-23 17:03:39,401 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 [2021-11-23 17:03:40,628 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 23 treesize of output 22 [2021-11-23 17:03:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:43,099 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 30 treesize of output 32 [2021-11-23 17:03:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:46,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:46,015 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 39 treesize of output 44 [2021-11-23 17:03:49,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:49,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:49,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:49,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:49,288 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