./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2iff.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_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2iff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/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 a22ecd7dbca86ce676366b458aa720e60c3fd1ca .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:32:25,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:32:25,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:32:25,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:32:25,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:32:25,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:32:25,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:32:25,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:32:25,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:32:25,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:32:25,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:32:25,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:32:25,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:32:25,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:32:25,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:32:25,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:32:25,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:32:25,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:32:25,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:32:25,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:32:25,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:32:25,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:32:25,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:32:25,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:32:25,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:32:25,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:32:25,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:32:25,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:32:25,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:32:25,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:32:25,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:32:25,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:32:25,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:32:25,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:32:25,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:32:25,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:32:25,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:32:25,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:32:25,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:32:25,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:32:25,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:32:25,729 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 09:32:25,752 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:32:25,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:32:25,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:32:25,753 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:32:25,753 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:32:25,753 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:32:25,753 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:32:25,753 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:32:25,754 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:32:25,754 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:32:25,754 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:32:25,754 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:32:25,754 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:32:25,754 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:32:25,754 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:32:25,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:32:25,755 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:32:25,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:32:25,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:32:25,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:32:25,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:32:25,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:32:25,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:32:25,756 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:32:25,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:32:25,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:32:25,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:32:25,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:32:25,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:32:25,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:32:25,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:32:25,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:32:25,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:32:25,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:32:25,757 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:32:25,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:32:25,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:32:25,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:32:25,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:32:25,757 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_1050e874-d747-462b-9967-9c88d9858401/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a22ecd7dbca86ce676366b458aa720e60c3fd1ca [2020-12-09 09:32:25,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:32:25,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:32:25,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:32:25,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:32:25,959 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:32:25,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/../../sv-benchmarks/c/array-fpi/s2iff.c [2020-12-09 09:32:26,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/data/5886ff1be/f6aebd4a785d4488a4a7b9bacd051e1a/FLAGebb701ad7 [2020-12-09 09:32:26,356 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:32:26,357 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/sv-benchmarks/c/array-fpi/s2iff.c [2020-12-09 09:32:26,361 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/data/5886ff1be/f6aebd4a785d4488a4a7b9bacd051e1a/FLAGebb701ad7 [2020-12-09 09:32:26,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/data/5886ff1be/f6aebd4a785d4488a4a7b9bacd051e1a [2020-12-09 09:32:26,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:32:26,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:32:26,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:32:26,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:32:26,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:32:26,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4f01bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26, skipping insertion in model container [2020-12-09 09:32:26,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:32:26,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:32:26,502 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_1050e874-d747-462b-9967-9c88d9858401/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2020-12-09 09:32:26,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:32:26,521 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:32:26,529 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_1050e874-d747-462b-9967-9c88d9858401/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2020-12-09 09:32:26,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:32:26,545 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:32:26,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26 WrapperNode [2020-12-09 09:32:26,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:32:26,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:32:26,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:32:26,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:32:26,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:32:26,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:32:26,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:32:26,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:32:26,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... [2020-12-09 09:32:26,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:32:26,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:32:26,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:32:26,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:32:26,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/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 09:32:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:32:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:32:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 09:32:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 09:32:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:32:26,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:32:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 09:32:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 09:32:26,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:32:26,907 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 09:32:26,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:32:26 BoogieIcfgContainer [2020-12-09 09:32:26,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:32:26,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:32:26,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:32:26,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:32:26,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:32:26" (1/3) ... [2020-12-09 09:32:26,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de4bfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:32:26, skipping insertion in model container [2020-12-09 09:32:26,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:32:26" (2/3) ... [2020-12-09 09:32:26,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de4bfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:32:26, skipping insertion in model container [2020-12-09 09:32:26,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:32:26" (3/3) ... [2020-12-09 09:32:26,915 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-12-09 09:32:26,925 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:32:26,928 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:32:26,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:32:26,953 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:32:26,953 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:32:26,953 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:32:26,953 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:32:26,953 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:32:26,953 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:32:26,953 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:32:26,954 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:32:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-09 09:32:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:32:26,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:32:26,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:32:26,967 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:32:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:32:26,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1591516051, now seen corresponding path program 1 times [2020-12-09 09:32:26,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:32:26,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196464076] [2020-12-09 09:32:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:32:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:32:27,106 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 09:32:27,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196464076] [2020-12-09 09:32:27,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:32:27,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:32:27,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451542925] [2020-12-09 09:32:27,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:32:27,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:32:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:32:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:32:27,122 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-09 09:32:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:32:27,148 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-12-09 09:32:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:32:27,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 09:32:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:32:27,155 INFO L225 Difference]: With dead ends: 18 [2020-12-09 09:32:27,155 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 09:32:27,157 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 09:32:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 09:32:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 09:32:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 09:32:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-09 09:32:27,179 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-09 09:32:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:32:27,179 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-09 09:32:27,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:32:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-09 09:32:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 09:32:27,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:32:27,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:32:27,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:32:27,180 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:32:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:32:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2098745102, now seen corresponding path program 1 times [2020-12-09 09:32:27,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:32:27,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389151085] [2020-12-09 09:32:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:32:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:32:27,234 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 09:32:27,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389151085] [2020-12-09 09:32:27,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:32:27,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 09:32:27,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262905878] [2020-12-09 09:32:27,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:32:27,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:32:27,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:32:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:32:27,238 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2020-12-09 09:32:27,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:32:27,264 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-12-09 09:32:27,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:32:27,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 09:32:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:32:27,265 INFO L225 Difference]: With dead ends: 12 [2020-12-09 09:32:27,265 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 09:32:27,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:32:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 09:32:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 09:32:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 09:32:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-09 09:32:27,268 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-12-09 09:32:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:32:27,268 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-09 09:32:27,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:32:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-09 09:32:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 09:32:27,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:32:27,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:32:27,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 09:32:27,269 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:32:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:32:27,270 INFO L82 PathProgramCache]: Analyzing trace with hash -636631016, now seen corresponding path program 1 times [2020-12-09 09:32:27,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:32:27,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663911648] [2020-12-09 09:32:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:32:27,283 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 09:32:27,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744555424] [2020-12-09 09:32:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/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 09:32:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:32:27,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-09 09:32:27,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:32:27,389 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 10 treesize of output 8 [2020-12-09 09:32:27,396 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:32:27,405 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:32:27,411 INFO L382 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 [2020-12-09 09:32:27,412 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 09:32:27,421 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:32:27,423 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:32:27,423 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2020-12-09 09:32:27,446 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-09 09:32:27,447 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:32:27,458 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:32:27,459 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:32:27,459 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-09 09:32:27,522 INFO L382 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 [2020-12-09 09:32:27,524 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:32:27,530 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:32:27,533 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 09:32:27,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:25 [2020-12-09 09:32:27,567 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:32:27,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:32:27,574 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:32:27,579 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:32:27,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:32:27,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:32:27,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:32:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:32:27,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:32:27,628 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 09:32:34,873 WARN L197 SmtUtils]: Spent 6.25 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 09:32:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:32:34,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663911648] [2020-12-09 09:32:34,887 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:32:34,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744555424] [2020-12-09 09:32:34,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1347386005] [2020-12-09 09:32:34,902 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 09:32:34,902 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:32:34,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:32:34,909 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:32:34,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:32:35,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:35,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:36,866 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:32:37,160 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-12-09 09:32:37,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:32:37,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 09:32:37,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-09 09:32:37,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280667817] [2020-12-09 09:32:37,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 09:32:37,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:32:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 09:32:37,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2020-12-09 09:32:37,191 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 12 states. [2020-12-09 09:32:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:32:37,287 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-12-09 09:32:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 09:32:37,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2020-12-09 09:32:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:32:37,288 INFO L225 Difference]: With dead ends: 15 [2020-12-09 09:32:37,288 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 09:32:37,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2020-12-09 09:32:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 09:32:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-09 09:32:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 09:32:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-09 09:32:37,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-09 09:32:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:32:37,291 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-09 09:32:37,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 09:32:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-09 09:32:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 09:32:37,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:32:37,291 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:32:37,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 09:32:37,493 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:32:37,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:32:37,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1739232690, now seen corresponding path program 2 times [2020-12-09 09:32:37,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:32:37,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196420372] [2020-12-09 09:32:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:32:37,534 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 09:32:37,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488324091] [2020-12-09 09:32:37,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/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 09:32:37,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 09:32:37,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:32:37,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 09:32:37,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:32:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:32:37,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:32:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:32:37,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196420372] [2020-12-09 09:32:37,716 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:32:37,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488324091] [2020-12-09 09:32:37,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888604647] [2020-12-09 09:32:37,719 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 09:32:37,719 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:32:37,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:32:37,720 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:32:37,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:32:37,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:37,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:37,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:37,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:38,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:38,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:38,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:38,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:41,318 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (select |v_#memory_int_56| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4) (- 8))) (select (select |v_#memory_int_56| |ULTIMATE.start_main_~#sum~0.base|) |ULTIMATE.start_main_~#sum~0.offset|)) [2020-12-09 09:32:41,703 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:32:41,864 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-09 09:32:41,985 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-12-09 09:32:42,006 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:32:42,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 09:32:42,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-09 09:32:42,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230500828] [2020-12-09 09:32:42,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 09:32:42,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:32:42,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 09:32:42,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-09 09:32:42,008 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 8 states. [2020-12-09 09:32:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:32:42,083 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-09 09:32:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 09:32:42,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-12-09 09:32:42,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:32:42,084 INFO L225 Difference]: With dead ends: 20 [2020-12-09 09:32:42,084 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 09:32:42,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-12-09 09:32:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 09:32:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2020-12-09 09:32:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 09:32:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-09 09:32:42,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2020-12-09 09:32:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:32:42,087 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-09 09:32:42,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 09:32:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-09 09:32:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 09:32:42,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:32:42,088 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:32:42,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:32:42,290 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:32:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:32:42,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1542522717, now seen corresponding path program 3 times [2020-12-09 09:32:42,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:32:42,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528497532] [2020-12-09 09:32:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:32:42,332 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 09:32:42,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958887088] [2020-12-09 09:32:42,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/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 09:32:42,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 09:32:42,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:32:42,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 09:32:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:32:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:32:42,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:32:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:32:42,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528497532] [2020-12-09 09:32:42,513 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:32:42,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958887088] [2020-12-09 09:32:42,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11825735] [2020-12-09 09:32:42,515 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 09:32:42,515 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:32:42,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:32:42,515 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:32:42,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:32:42,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:32:44,496 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:32:44,728 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:32:44,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 09:32:44,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-09 09:32:44,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996138988] [2020-12-09 09:32:44,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 09:32:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:32:44,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 09:32:44,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-09 09:32:44,730 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 9 states. [2020-12-09 09:32:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:32:44,798 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-12-09 09:32:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 09:32:44,799 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-09 09:32:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:32:44,799 INFO L225 Difference]: With dead ends: 14 [2020-12-09 09:32:44,799 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 09:32:44,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-09 09:32:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 09:32:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 09:32:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 09:32:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-09 09:32:44,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-12-09 09:32:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:32:44,802 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-09 09:32:44,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 09:32:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-09 09:32:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 09:32:44,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:32:44,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 09:32:45,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-09 09:32:45,004 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:32:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:32:45,005 INFO L82 PathProgramCache]: Analyzing trace with hash 573521677, now seen corresponding path program 4 times [2020-12-09 09:32:45,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:32:45,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168311208] [2020-12-09 09:32:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:32:45,030 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 09:32:45,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991984478] [2020-12-09 09:32:45,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/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 09:32:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:32:45,100 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:32:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:32:45,123 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:32:45,157 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 09:32:45,157 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:32:45,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:32:45,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:32:45 BoogieIcfgContainer [2020-12-09 09:32:45,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:32:45,401 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:32:45,401 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:32:45,402 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:32:45,402 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:32:26" (3/4) ... [2020-12-09 09:32:45,403 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 09:32:45,437 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1050e874-d747-462b-9967-9c88d9858401/bin/utaipan/witness.graphml [2020-12-09 09:32:45,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:32:45,438 INFO L168 Benchmark]: Toolchain (without parser) took 19064.99 ms. Allocated memory was 121.6 MB in the beginning and 153.1 MB in the end (delta: 31.5 MB). Free memory was 83.5 MB in the beginning and 66.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 48.8 MB. Max. memory is 16.1 GB. [2020-12-09 09:32:45,438 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 121.6 MB. Free memory was 99.8 MB in the beginning and 99.7 MB in the end (delta: 97.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:32:45,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.37 ms. Allocated memory is still 121.6 MB. Free memory was 83.3 MB in the beginning and 96.5 MB in the end (delta: -13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 09:32:45,439 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.79 ms. Allocated memory is still 121.6 MB. Free memory was 96.5 MB in the beginning and 94.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:32:45,439 INFO L168 Benchmark]: Boogie Preprocessor took 22.40 ms. Allocated memory is still 121.6 MB. Free memory was 94.9 MB in the beginning and 93.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:32:45,439 INFO L168 Benchmark]: RCFGBuilder took 314.91 ms. Allocated memory is still 121.6 MB. Free memory was 93.3 MB in the beginning and 69.2 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:32:45,440 INFO L168 Benchmark]: TraceAbstraction took 18491.37 ms. Allocated memory was 121.6 MB in the beginning and 153.1 MB in the end (delta: 31.5 MB). Free memory was 69.2 MB in the beginning and 69.8 MB in the end (delta: -652.2 kB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2020-12-09 09:32:45,440 INFO L168 Benchmark]: Witness Printer took 36.39 ms. Allocated memory is still 153.1 MB. Free memory was 69.8 MB in the beginning and 66.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:32:45,441 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 121.6 MB. Free memory was 99.8 MB in the beginning and 99.7 MB in the end (delta: 97.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 171.37 ms. Allocated memory is still 121.6 MB. Free memory was 83.3 MB in the beginning and 96.5 MB in the end (delta: -13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.79 ms. Allocated memory is still 121.6 MB. Free memory was 96.5 MB in the beginning and 94.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.40 ms. Allocated memory is still 121.6 MB. Free memory was 94.9 MB in the beginning and 93.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 314.91 ms. Allocated memory is still 121.6 MB. Free memory was 93.3 MB in the beginning and 69.2 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18491.37 ms. Allocated memory was 121.6 MB in the beginning and 153.1 MB in the end (delta: 31.5 MB). Free memory was 69.2 MB in the beginning and 69.8 MB in the end (delta: -652.2 kB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. * Witness Printer took 36.39 ms. Allocated memory is still 153.1 MB. Free memory was 69.8 MB in the beginning and 66.7 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: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i