./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/indp2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan --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 c50b40cd11bc256173e14037b4ee99385e99b290 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:10:02,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:10:02,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:10:02,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:10:02,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:10:02,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:10:02,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:10:02,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:10:02,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:10:02,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:10:02,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:10:02,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:10:02,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:10:02,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:10:02,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:10:02,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:10:02,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:10:02,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:10:02,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:10:02,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:10:02,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:10:02,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:10:02,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:10:02,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:10:02,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:10:02,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:10:02,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:10:02,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:10:02,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:10:02,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:10:02,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:10:02,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:10:02,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:10:02,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:10:02,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:10:02,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:10:02,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:10:02,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:10:02,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:10:02,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:10:02,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:10:02,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:10:02,592 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:10:02,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:10:02,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:10:02,593 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:10:02,593 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:10:02,593 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:10:02,593 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:10:02,593 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:10:02,594 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:10:02,594 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:10:02,594 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:10:02,594 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:10:02,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:10:02,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:10:02,594 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:10:02,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:10:02,595 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:10:02,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:10:02,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:10:02,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:10:02,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:10:02,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:10:02,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:10:02,595 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:10:02,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:10:02,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:10:02,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:10:02,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:10:02,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:10:02,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:10:02,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:10:02,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:10:02,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:10:02,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:10:02,597 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:10:02,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:10:02,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:10:02,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:10:02,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:10:02,597 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-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c50b40cd11bc256173e14037b4ee99385e99b290 [2020-12-09 07:10:02,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:10:02,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:10:02,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:10:02,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:10:02,797 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:10:02,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/../../sv-benchmarks/c/array-fpi/indp2.c [2020-12-09 07:10:02,837 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/data/c46625e16/77f2b50ae6fd4e579cbcf3266d00059a/FLAG2c9d00bae [2020-12-09 07:10:03,199 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:10:03,200 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/sv-benchmarks/c/array-fpi/indp2.c [2020-12-09 07:10:03,205 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/data/c46625e16/77f2b50ae6fd4e579cbcf3266d00059a/FLAG2c9d00bae [2020-12-09 07:10:03,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/data/c46625e16/77f2b50ae6fd4e579cbcf3266d00059a [2020-12-09 07:10:03,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:10:03,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:10:03,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:10:03,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:10:03,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:10:03,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@621ece05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03, skipping insertion in model container [2020-12-09 07:10:03,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:10:03,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:10:03,348 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2020-12-09 07:10:03,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:10:03,370 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:10:03,381 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2020-12-09 07:10:03,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:10:03,395 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:10:03,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03 WrapperNode [2020-12-09 07:10:03,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:10:03,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:10:03,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:10:03,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:10:03,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:10:03,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:10:03,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:10:03,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:10:03,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... [2020-12-09 07:10:03,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:10:03,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:10:03,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:10:03,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:10:03,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:10:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:10:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:10:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 07:10:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 07:10:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:10:03,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:10:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 07:10:03,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:10:03,742 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-09 07:10:03,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:10:03 BoogieIcfgContainer [2020-12-09 07:10:03,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:10:03,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:10:03,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:10:03,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:10:03,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:10:03" (1/3) ... [2020-12-09 07:10:03,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b450889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:10:03, skipping insertion in model container [2020-12-09 07:10:03,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:10:03" (2/3) ... [2020-12-09 07:10:03,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b450889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:10:03, skipping insertion in model container [2020-12-09 07:10:03,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:10:03" (3/3) ... [2020-12-09 07:10:03,750 INFO L111 eAbstractionObserver]: Analyzing ICFG indp2.c [2020-12-09 07:10:03,759 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:10:03,762 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:10:03,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:10:03,787 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:10:03,787 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:10:03,787 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:10:03,787 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:10:03,787 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:10:03,787 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:10:03,788 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:10:03,788 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:10:03,796 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 07:10:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 07:10:03,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:03,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:03,800 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:03,804 INFO L82 PathProgramCache]: Analyzing trace with hash -16623148, now seen corresponding path program 1 times [2020-12-09 07:10:03,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:10:03,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408373063] [2020-12-09 07:10:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:10:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:10:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:10:03,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408373063] [2020-12-09 07:10:03,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:10:03,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:10:03,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280002825] [2020-12-09 07:10:03,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:10:03,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:10:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:10:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:10:03,963 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-09 07:10:03,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:03,992 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2020-12-09 07:10:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:10:03,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 07:10:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:03,999 INFO L225 Difference]: With dead ends: 22 [2020-12-09 07:10:03,999 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 07:10:04,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:10:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 07:10:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 07:10:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 07:10:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2020-12-09 07:10:04,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2020-12-09 07:10:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:04,028 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2020-12-09 07:10:04,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:10:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2020-12-09 07:10:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 07:10:04,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:04,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:04,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:10:04,029 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash 147050282, now seen corresponding path program 1 times [2020-12-09 07:10:04,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:10:04,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910669392] [2020-12-09 07:10:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:10:04,046 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:10:04,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530537225] [2020-12-09 07:10:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:10:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:10:04,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 07:10:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:10:04,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:10:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:10:04,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910669392] [2020-12-09 07:10:04,152 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:10:04,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530537225] [2020-12-09 07:10:04,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:10:04,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-12-09 07:10:04,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119989800] [2020-12-09 07:10:04,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 07:10:04,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:10:04,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 07:10:04,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:10:04,155 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 5 states. [2020-12-09 07:10:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:04,192 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2020-12-09 07:10:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 07:10:04,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 07:10:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:04,193 INFO L225 Difference]: With dead ends: 24 [2020-12-09 07:10:04,193 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 07:10:04,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 07:10:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 07:10:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2020-12-09 07:10:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 07:10:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-09 07:10:04,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2020-12-09 07:10:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:04,197 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-09 07:10:04,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 07:10:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-09 07:10:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 07:10:04,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:04,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:04,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 07:10:04,399 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:04,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1149653049, now seen corresponding path program 1 times [2020-12-09 07:10:04,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:10:04,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692888672] [2020-12-09 07:10:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:10:04,427 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:10:04,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166095544] [2020-12-09 07:10:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:10:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:10:04,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-09 07:10:04,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:04,532 INFO L382 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 [2020-12-09 07:10:04,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 07:10:04,538 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:10:04,539 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 07:10:04,539 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:16 [2020-12-09 07:10:04,567 INFO L382 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 [2020-12-09 07:10:04,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 07:10:04,570 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:10:04,571 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 07:10:04,571 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2020-12-09 07:10:04,586 INFO L382 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 27 treesize of output 15 [2020-12-09 07:10:04,587 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 07:10:04,589 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:10:04,589 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 07:10:04,589 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:7 [2020-12-09 07:10:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:10:04,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:10:04,691 INFO L382 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 22 treesize of output 20 [2020-12-09 07:10:04,697 INFO L382 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 36 treesize of output 34 [2020-12-09 07:10:04,701 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 07:10:04,705 INFO L625 ElimStorePlain]: treesize reduction 8, result has 38.5 percent of original size [2020-12-09 07:10:04,705 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 07:10:04,709 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:10:04,709 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 07:10:04,710 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:11 [2020-12-09 07:10:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:10:04,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692888672] [2020-12-09 07:10:04,733 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:10:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166095544] [2020-12-09 07:10:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528711254] [2020-12-09 07:10:04,750 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:10:04,750 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:10:04,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:10:04,757 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:10:04,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:10:04,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:05,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:05,437 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:10:05,774 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-12-09 07:10:05,947 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:10:05,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 07:10:05,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-12-09 07:10:05,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449843566] [2020-12-09 07:10:05,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 07:10:05,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:10:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 07:10:05,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-12-09 07:10:05,949 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 14 states. [2020-12-09 07:10:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:06,271 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-12-09 07:10:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-09 07:10:06,271 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-09 07:10:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:06,272 INFO L225 Difference]: With dead ends: 39 [2020-12-09 07:10:06,272 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 07:10:06,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-12-09 07:10:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 07:10:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 17. [2020-12-09 07:10:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 07:10:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2020-12-09 07:10:06,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2020-12-09 07:10:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:06,277 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2020-12-09 07:10:06,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 07:10:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2020-12-09 07:10:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 07:10:06,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:06,277 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:06,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:10:06,479 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:06,480 INFO L82 PathProgramCache]: Analyzing trace with hash 830670329, now seen corresponding path program 2 times [2020-12-09 07:10:06,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:10:06,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870801993] [2020-12-09 07:10:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:10:06,512 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:10:06,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861089715] [2020-12-09 07:10:06,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:10:06,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 07:10:06,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:10:06,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 07:10:06,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 07:10:06,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:10:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 07:10:06,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870801993] [2020-12-09 07:10:06,616 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:10:06,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861089715] [2020-12-09 07:10:06,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [920357725] [2020-12-09 07:10:06,618 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:10:06,618 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:10:06,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:10:06,619 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:10:06,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:10:06,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:06,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:06,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:06,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:06,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:06,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:06,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:06,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:07,020 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:10:07,419 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:10:07,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 07:10:07,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-09 07:10:07,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942570532] [2020-12-09 07:10:07,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 07:10:07,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:10:07,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 07:10:07,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-09 07:10:07,421 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 9 states. [2020-12-09 07:10:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:07,494 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-12-09 07:10:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:10:07,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-09 07:10:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:07,495 INFO L225 Difference]: With dead ends: 49 [2020-12-09 07:10:07,495 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 07:10:07,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-09 07:10:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 07:10:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-09 07:10:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 07:10:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-09 07:10:07,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2020-12-09 07:10:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:07,498 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-09 07:10:07,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 07:10:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-09 07:10:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 07:10:07,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:07,499 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:07,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-09 07:10:07,701 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:07,702 INFO L82 PathProgramCache]: Analyzing trace with hash -155389748, now seen corresponding path program 3 times [2020-12-09 07:10:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:10:07,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576993388] [2020-12-09 07:10:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:10:07,718 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:10:07,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731868005] [2020-12-09 07:10:07,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:10:07,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 07:10:07,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:10:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 07:10:07,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 07:10:07,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:10:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 07:10:07,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576993388] [2020-12-09 07:10:07,810 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:10:07,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731868005] [2020-12-09 07:10:07,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127932523] [2020-12-09 07:10:07,812 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:10:07,812 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:10:07,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:10:07,813 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:10:07,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:10:07,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:08,295 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:10:08,741 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:10:08,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 07:10:08,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-09 07:10:08,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737710352] [2020-12-09 07:10:08,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 07:10:08,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:10:08,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 07:10:08,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-09 07:10:08,742 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 11 states. [2020-12-09 07:10:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:08,830 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-12-09 07:10:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:10:08,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-09 07:10:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:08,831 INFO L225 Difference]: With dead ends: 61 [2020-12-09 07:10:08,831 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 07:10:08,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-09 07:10:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 07:10:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2020-12-09 07:10:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 07:10:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-09 07:10:08,836 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-12-09 07:10:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:08,836 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-09 07:10:08,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 07:10:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-09 07:10:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 07:10:08,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:08,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:09,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:10:09,039 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2089542371, now seen corresponding path program 1 times [2020-12-09 07:10:09,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:10:09,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475818358] [2020-12-09 07:10:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:10:09,061 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:10:09,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610779524] [2020-12-09 07:10:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:10:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:10:09,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-09 07:10:09,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:10:09,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:10:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:10:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475818358] [2020-12-09 07:10:09,374 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:10:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610779524] [2020-12-09 07:10:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604505805] [2020-12-09 07:10:09,376 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 07:10:09,376 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:10:09,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:10:09,376 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:10:09,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:10:09,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:09,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:10:09,816 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:10:10,544 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-09 07:10:10,815 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-12-09 07:10:10,927 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:10:10,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 07:10:10,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2020-12-09 07:10:10,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111849387] [2020-12-09 07:10:10,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 07:10:10,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:10:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 07:10:10,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-12-09 07:10:10,929 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 18 states. [2020-12-09 07:10:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:10,930 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-12-09 07:10:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 07:10:10,930 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2020-12-09 07:10:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:10,930 INFO L225 Difference]: With dead ends: 30 [2020-12-09 07:10:10,930 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 07:10:10,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-12-09 07:10:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 07:10:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 07:10:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 07:10:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 07:10:10,931 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-12-09 07:10:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:10,931 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 07:10:10,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 07:10:10,931 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 07:10:10,931 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 07:10:11,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-12-09 07:10:11,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 07:10:11,284 INFO L258 CegarLoopResult]: At program point L35-3(lines 35 38) the Hoare annotation is: (let ((.cse0 (= (+ (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset) 1) 0)) (.cse1 (< 0 ~N~0)) (.cse2 (<= ~N~0 1))) (or (and (= ULTIMATE.start_main_~i~0 0) .cse0 .cse1 .cse2) (and (<= ULTIMATE.start_main_~i~0 1) (<= 1 ULTIMATE.start_main_~i~0) .cse0 .cse1 .cse2))) [2020-12-09 07:10:11,284 INFO L262 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-12-09 07:10:11,284 INFO L262 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-12-09 07:10:11,284 INFO L262 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-12-09 07:10:11,284 INFO L258 CegarLoopResult]: At program point L40-3(lines 40 43) the Hoare annotation is: (let ((.cse0 (select |#memory_int| ULTIMATE.start_main_~a~0.base)) (.cse2 (< 0 ~N~0)) (.cse3 (<= ~N~0 1))) (or (and (= (select (let ((.cse1 (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 8)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) ULTIMATE.start_main_~a~0.offset) 0) (<= ULTIMATE.start_main_~i~0 1) (<= 1 ULTIMATE.start_main_~i~0) .cse2 .cse3) (and (= ULTIMATE.start_main_~i~0 0) (= (+ (select .cse0 ULTIMATE.start_main_~a~0.offset) 1) 0) .cse2 .cse3))) [2020-12-09 07:10:11,284 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 07:10:11,285 INFO L262 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-12-09 07:10:11,285 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-12-09 07:10:11,285 INFO L258 CegarLoopResult]: At program point L45-3(lines 45 48) the Hoare annotation is: (let ((.cse0 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) (.cse1 (< 0 ~N~0)) (.cse2 (<= ~N~0 1))) (or (and .cse0 (<= ULTIMATE.start_main_~i~0 1) (<= 1 ULTIMATE.start_main_~i~0) .cse1 .cse2) (and .cse0 (<= 2 ULTIMATE.start_main_~i~0) (<= ~N~0 2) .cse1 (<= ULTIMATE.start_main_~i~0 2)) (and (= ULTIMATE.start_main_~i~0 0) (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset) 0) .cse1 .cse2))) [2020-12-09 07:10:11,285 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 07:10:11,285 INFO L265 CegarLoopResult]: At program point L50(lines 21 51) the Hoare annotation is: true [2020-12-09 07:10:11,285 INFO L258 CegarLoopResult]: At program point L30-3(lines 30 33) the Hoare annotation is: false [2020-12-09 07:10:11,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:10:11 BoogieIcfgContainer [2020-12-09 07:10:11,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:10:11,299 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:10:11,299 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:10:11,299 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:10:11,299 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:10:03" (3/4) ... [2020-12-09 07:10:11,301 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 07:10:11,307 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-12-09 07:10:11,307 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 07:10:11,307 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 07:10:11,307 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 07:10:11,338 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f4df6c2a-b33e-4d0a-8216-1daea19d43d7/bin/utaipan/witness.graphml [2020-12-09 07:10:11,338 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:10:11,339 INFO L168 Benchmark]: Toolchain (without parser) took 8119.89 ms. Allocated memory was 94.4 MB in the beginning and 172.0 MB in the end (delta: 77.6 MB). Free memory was 53.3 MB in the beginning and 103.4 MB in the end (delta: -50.1 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. [2020-12-09 07:10:11,339 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 94.4 MB. Free memory is still 69.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:10:11,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.74 ms. Allocated memory is still 94.4 MB. Free memory was 53.2 MB in the beginning and 67.3 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2020-12-09 07:10:11,340 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.33 ms. Allocated memory is still 94.4 MB. Free memory was 67.3 MB in the beginning and 66.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:10:11,340 INFO L168 Benchmark]: Boogie Preprocessor took 22.23 ms. Allocated memory is still 94.4 MB. Free memory was 65.6 MB in the beginning and 64.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:10:11,340 INFO L168 Benchmark]: RCFGBuilder took 300.65 ms. Allocated memory is still 94.4 MB. Free memory was 64.6 MB in the beginning and 57.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:10:11,340 INFO L168 Benchmark]: TraceAbstraction took 7553.88 ms. Allocated memory was 94.4 MB in the beginning and 172.0 MB in the end (delta: 77.6 MB). Free memory was 56.5 MB in the beginning and 106.6 MB in the end (delta: -50.1 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. [2020-12-09 07:10:11,341 INFO L168 Benchmark]: Witness Printer took 39.26 ms. Allocated memory is still 172.0 MB. Free memory was 106.6 MB in the beginning and 103.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:10:11,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 94.4 MB. Free memory is still 69.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 175.74 ms. Allocated memory is still 94.4 MB. Free memory was 53.2 MB in the beginning and 67.3 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.33 ms. Allocated memory is still 94.4 MB. Free memory was 67.3 MB in the beginning and 66.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.23 ms. Allocated memory is still 94.4 MB. Free memory was 65.6 MB in the beginning and 64.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 300.65 ms. Allocated memory is still 94.4 MB. Free memory was 64.6 MB in the beginning and 57.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7553.88 ms. Allocated memory was 94.4 MB in the beginning and 172.0 MB in the end (delta: 77.6 MB). Free memory was 56.5 MB in the beginning and 106.6 MB in the end (delta: -50.1 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. * Witness Printer took 39.26 ms. Allocated memory is still 172.0 MB. Free memory was 106.6 MB in the beginning and 103.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (((((!(0 == cond) && i <= 1) && 1 <= i) && 0 < N) && N <= 1) || ((((!(0 == cond) && 2 <= i) && N <= 2) && 0 < N) && i <= 2)) || (((i == 0 && unknown-#memory_int-unknown[a][a] == 0) && 0 < N) && N <= 1) - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((unknown-#memory_int-unknown[a][a + i * 8 := unknown-#memory_int-unknown[a][a + i * 8] + 1][a] == 0 && i <= 1) && 1 <= i) && 0 < N) && N <= 1) || (((i == 0 && unknown-#memory_int-unknown[a][a] + 1 == 0) && 0 < N) && N <= 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((i == 0 && unknown-#memory_int-unknown[a][a] + 1 == 0) && 0 < N) && N <= 1) || ((((i <= 1 && 1 <= i) && unknown-#memory_int-unknown[a][a] + 1 == 0) && 0 < N) && N <= 1) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.3s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 88 SDslu, 82 SDs, 0 SdLazy, 278 SolverSat, 124 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 90 SyntacticMatches, 20 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 52 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 13 NumberOfFragments, 153 HoareAnnotationTreeSize, 5 FomulaSimplifications, 271 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 267 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 73 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 10617 SizeOfPredicates, 31 NumberOfNonLiveVariables, 407 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 36/70 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...