./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebf5d98846752a57fac2a507e38ab464af4ccce6 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebf5d98846752a57fac2a507e38ab464af4ccce6 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 19:09:50,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:09:50,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:09:50,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:09:50,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:09:50,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:09:50,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:09:50,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:09:50,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:09:50,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:09:50,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:09:50,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:09:50,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:09:50,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:09:50,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:09:50,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:09:50,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:09:50,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:09:50,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:09:50,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:09:50,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:09:50,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:09:50,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:09:50,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:09:50,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:09:50,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:09:50,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:09:50,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:09:50,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:09:50,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:09:50,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:09:50,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:09:50,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:09:50,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:09:50,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:09:50,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:09:50,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:09:50,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:09:50,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:09:50,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:09:50,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:09:50,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 19:09:50,759 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:09:50,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:09:50,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:09:50,759 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:09:50,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:09:50,760 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:09:50,760 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 19:09:50,760 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:09:50,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:09:50,760 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 19:09:50,760 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 19:09:50,760 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:09:50,761 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 19:09:50,761 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 19:09:50,761 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 19:09:50,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:09:50,761 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:09:50,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:09:50,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:09:50,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:09:50,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:09:50,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:09:50,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:09:50,762 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 19:09:50,762 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:09:50,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:09:50,763 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:09:50,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:09:50,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:09:50,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:09:50,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:09:50,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:09:50,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:09:50,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:09:50,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:09:50,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 19:09:50,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:09:50,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:09:50,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:09:50,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:09:50,764 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/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(__VERIFIER_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 -> ebf5d98846752a57fac2a507e38ab464af4ccce6 [2019-12-07 19:09:50,863 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:09:50,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:09:50,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:09:50,878 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:09:50,878 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:09:50,879 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/../../sv-benchmarks/c/array-fpi/ifeqn3f.c [2019-12-07 19:09:50,920 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data/192ab0c14/724980c53ea14f47af4af2704a747e43/FLAG6637072cb [2019-12-07 19:09:51,347 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:09:51,347 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/sv-benchmarks/c/array-fpi/ifeqn3f.c [2019-12-07 19:09:51,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data/192ab0c14/724980c53ea14f47af4af2704a747e43/FLAG6637072cb [2019-12-07 19:09:51,715 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data/192ab0c14/724980c53ea14f47af4af2704a747e43 [2019-12-07 19:09:51,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:09:51,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:09:51,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:09:51,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:09:51,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:09:51,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cabb56d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51, skipping insertion in model container [2019-12-07 19:09:51,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:09:51,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:09:51,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:09:51,871 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:09:51,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:09:51,924 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:09:51,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51 WrapperNode [2019-12-07 19:09:51,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:09:51,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:09:51,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:09:51,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:09:51,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:09:51,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:09:51,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:09:51,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:09:51,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... [2019-12-07 19:09:51,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:09:51,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:09:51,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:09:51,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:09:51,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/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 [2019-12-07 19:09:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 19:09:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 19:09:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:09:52,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:09:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 19:09:52,207 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:09:52,207 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 19:09:52,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:09:52 BoogieIcfgContainer [2019-12-07 19:09:52,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:09:52,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:09:52,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:09:52,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:09:52,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:09:51" (1/3) ... [2019-12-07 19:09:52,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2068b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:09:52, skipping insertion in model container [2019-12-07 19:09:52,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:51" (2/3) ... [2019-12-07 19:09:52,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2068b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:09:52, skipping insertion in model container [2019-12-07 19:09:52,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:09:52" (3/3) ... [2019-12-07 19:09:52,214 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2019-12-07 19:09:52,221 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:09:52,225 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:09:52,232 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:09:52,245 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:09:52,246 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:09:52,246 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:09:52,246 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:09:52,246 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:09:52,246 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:09:52,246 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:09:52,246 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:09:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 19:09:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 19:09:52,258 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:09:52,259 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:09:52,259 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:09:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:09:52,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1907558339, now seen corresponding path program 1 times [2019-12-07 19:09:52,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:09:52,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811208114] [2019-12-07 19:09:52,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:09:52,333 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 19:09:52,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086193424] [2019-12-07 19:09:52,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/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 [2019-12-07 19:09:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:52,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 19:09:52,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:09:52,405 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:09:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:09:52,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811208114] [2019-12-07 19:09:52,413 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 19:09:52,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086193424] [2019-12-07 19:09:52,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:09:52,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 19:09:52,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484756401] [2019-12-07 19:09:52,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 19:09:52,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:09:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 19:09:52,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:09:52,428 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2019-12-07 19:09:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:09:52,456 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2019-12-07 19:09:52,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 19:09:52,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 19:09:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:09:52,463 INFO L225 Difference]: With dead ends: 20 [2019-12-07 19:09:52,463 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 19:09:52,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:09:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 19:09:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 19:09:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 19:09:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-12-07 19:09:52,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2019-12-07 19:09:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:09:52,485 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-12-07 19:09:52,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 19:09:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-12-07 19:09:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 19:09:52,486 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:09:52,486 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:09:52,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:09:52,687 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:09:52,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:09:52,688 INFO L82 PathProgramCache]: Analyzing trace with hash 943394408, now seen corresponding path program 1 times [2019-12-07 19:09:52,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:09:52,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053512149] [2019-12-07 19:09:52,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:09:52,728 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 19:09:52,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898715981] [2019-12-07 19:09:52,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/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 [2019-12-07 19:09:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:52,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 19:09:52,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:09:52,782 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:09:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:09:52,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053512149] [2019-12-07 19:09:52,789 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 19:09:52,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898715981] [2019-12-07 19:09:52,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:09:52,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-12-07 19:09:52,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766891162] [2019-12-07 19:09:52,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 19:09:52,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:09:52,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 19:09:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:09:52,792 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2019-12-07 19:09:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:09:52,820 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2019-12-07 19:09:52,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 19:09:52,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-07 19:09:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:09:52,821 INFO L225 Difference]: With dead ends: 21 [2019-12-07 19:09:52,821 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 19:09:52,822 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-07 19:09:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 19:09:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2019-12-07 19:09:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 19:09:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-12-07 19:09:52,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2019-12-07 19:09:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:09:52,826 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-12-07 19:09:52,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 19:09:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-12-07 19:09:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 19:09:52,826 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:09:52,826 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:09:53,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:09:53,028 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:09:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:09:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash -820589996, now seen corresponding path program 1 times [2019-12-07 19:09:53,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:09:53,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222348537] [2019-12-07 19:09:53,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:09:53,072 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 19:09:53,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260656355] [2019-12-07 19:09:53,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/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 [2019-12-07 19:09:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:53,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 19:09:53,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:53,129 INFO L377 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 [2019-12-07 19:09:53,129 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 19:09:53,132 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 19:09:53,133 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 19:09:53,133 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-12-07 19:09:53,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:09:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:09:53,155 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:09:53,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:09:53,187 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 19:09:53,188 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2019-12-07 19:09:53,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:09:53,190 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_2], 2=[v_arrayElimCell_1]} [2019-12-07 19:09:53,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222348537] [2019-12-07 19:09:53,193 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 19:09:53,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260656355] [2019-12-07 19:09:53,193 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@7dc9b3d6 [2019-12-07 19:09:53,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [966063929] [2019-12-07 19:09:53,208 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-12-07 19:09:53,208 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:09:53,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 19:09:53,216 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 19:09:53,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 19:09:53,238 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@7dc9b3d6 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:91) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:555) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:428) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:234) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 19:09:53,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:09:53,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 19:09:53,239 ERROR L206 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2019-12-07 19:09:53,239 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 19:09:53,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:09:53,454 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2019-12-07 19:09:53,454 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2019-12-07 19:09:53,455 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2019-12-07 19:09:53,455 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2019-12-07 19:09:53,455 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2019-12-07 19:09:53,456 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2019-12-07 19:09:53,456 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2019-12-07 19:09:53,456 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2019-12-07 19:09:53,478 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 19:09:53,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:09:53 BoogieIcfgContainer [2019-12-07 19:09:53,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:09:53,479 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:09:53,480 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:09:53,480 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:09:53,480 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:09:52" (3/4) ... [2019-12-07 19:09:53,484 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 19:09:53,484 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:09:53,486 INFO L168 Benchmark]: Toolchain (without parser) took 1763.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 947.8 MB in the beginning and 981.0 MB in the end (delta: -33.2 MB). Peak memory consumption was 62.3 MB. Max. memory is 11.5 GB. [2019-12-07 19:09:53,487 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:09:53,487 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.37 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 947.8 MB in the beginning and 1.1 GB in the end (delta: -141.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 19:09:53,488 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.28 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:09:53,489 INFO L168 Benchmark]: Boogie Preprocessor took 15.98 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:09:53,489 INFO L168 Benchmark]: RCFGBuilder took 243.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. [2019-12-07 19:09:53,490 INFO L168 Benchmark]: TraceAbstraction took 1270.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 981.0 MB in the end (delta: 80.9 MB). Peak memory consumption was 80.9 MB. Max. memory is 11.5 GB. [2019-12-07 19:09:53,490 INFO L168 Benchmark]: Witness Printer took 5.07 ms. Allocated memory is still 1.1 GB. Free memory is still 981.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:09:53,493 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 200.37 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 947.8 MB in the beginning and 1.1 GB in the end (delta: -141.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.28 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.98 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 243.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1270.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 981.0 MB in the end (delta: 80.9 MB). Peak memory consumption was 80.9 MB. Max. memory is 11.5 GB. * Witness Printer took 5.07 ms. Allocated memory is still 1.1 GB. Free memory is still 981.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] i=0 [L26] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/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(__VERIFIER_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 -> ebf5d98846752a57fac2a507e38ab464af4ccce6 [2019-12-07 19:09:55,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:09:55,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:09:55,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:09:55,089 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:09:55,089 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:09:55,090 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/../../sv-benchmarks/c/array-fpi/ifeqn3f.c [2019-12-07 19:09:55,128 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data/d06f1955c/ddb18201efa740aface956c64f112313/FLAGeb20c11c2 [2019-12-07 19:09:55,592 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:09:55,593 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/sv-benchmarks/c/array-fpi/ifeqn3f.c [2019-12-07 19:09:55,597 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data/d06f1955c/ddb18201efa740aface956c64f112313/FLAGeb20c11c2 [2019-12-07 19:09:55,605 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/data/d06f1955c/ddb18201efa740aface956c64f112313 [2019-12-07 19:09:55,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:09:55,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:09:55,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:09:55,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:09:55,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:09:55,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb84b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55, skipping insertion in model container [2019-12-07 19:09:55,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:09:55,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:09:55,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:09:55,743 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:09:55,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:09:55,768 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:09:55,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55 WrapperNode [2019-12-07 19:09:55,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:09:55,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:09:55,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:09:55,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:09:55,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:09:55,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:09:55,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:09:55,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:09:55,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... [2019-12-07 19:09:55,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:09:55,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:09:55,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:09:55,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:09:55,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/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 [2019-12-07 19:09:55,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2019-12-07 19:09:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 19:09:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:09:55,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:09:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2019-12-07 19:09:56,070 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:09:56,070 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 19:09:56,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:09:56 BoogieIcfgContainer [2019-12-07 19:09:56,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:09:56,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:09:56,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:09:56,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:09:56,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:09:55" (1/3) ... [2019-12-07 19:09:56,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e989ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:09:56, skipping insertion in model container [2019-12-07 19:09:56,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:09:55" (2/3) ... [2019-12-07 19:09:56,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e989ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:09:56, skipping insertion in model container [2019-12-07 19:09:56,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:09:56" (3/3) ... [2019-12-07 19:09:56,076 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2019-12-07 19:09:56,082 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:09:56,086 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:09:56,094 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:09:56,110 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:09:56,110 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:09:56,110 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:09:56,110 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:09:56,110 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:09:56,110 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:09:56,110 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:09:56,110 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:09:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-12-07 19:09:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 19:09:56,122 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:09:56,123 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:09:56,123 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:09:56,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:09:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1201566748, now seen corresponding path program 1 times [2019-12-07 19:09:56,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:09:56,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955371336] [2019-12-07 19:09:56,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 19:09:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:56,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 19:09:56,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:09:56,197 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:09:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:09:56,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955371336] [2019-12-07 19:09:56,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:09:56,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 19:09:56,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217621542] [2019-12-07 19:09:56,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 19:09:56,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:09:56,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 19:09:56,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 19:09:56,214 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-12-07 19:09:56,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:09:56,226 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2019-12-07 19:09:56,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 19:09:56,226 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-12-07 19:09:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:09:56,232 INFO L225 Difference]: With dead ends: 36 [2019-12-07 19:09:56,232 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 19:09:56,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 19:09:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 19:09:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 19:09:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 19:09:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-12-07 19:09:56,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-12-07 19:09:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:09:56,256 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-12-07 19:09:56,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 19:09:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-12-07 19:09:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 19:09:56,256 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:09:56,256 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:09:56,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 19:09:56,458 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:09:56,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:09:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1920794649, now seen corresponding path program 1 times [2019-12-07 19:09:56,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:09:56,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799219772] [2019-12-07 19:09:56,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 19:09:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:56,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 19:09:56,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:09:56,627 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:09:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:09:56,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799219772] [2019-12-07 19:09:56,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:09:56,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 19:09:56,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680766376] [2019-12-07 19:09:56,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 19:09:56,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:09:56,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 19:09:56,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:09:56,639 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2019-12-07 19:09:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:09:56,736 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2019-12-07 19:09:56,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 19:09:56,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 19:09:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:09:56,737 INFO L225 Difference]: With dead ends: 34 [2019-12-07 19:09:56,737 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 19:09:56,737 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:09:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 19:09:56,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-12-07 19:09:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 19:09:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-12-07 19:09:56,741 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2019-12-07 19:09:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:09:56,742 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-12-07 19:09:56,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 19:09:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-12-07 19:09:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 19:09:56,742 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:09:56,742 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:09:56,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 19:09:56,944 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:09:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:09:56,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1948223762, now seen corresponding path program 1 times [2019-12-07 19:09:56,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:09:56,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969341782] [2019-12-07 19:09:56,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 19:09:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:57,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 19:09:57,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:09:57,131 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:09:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:09:57,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969341782] [2019-12-07 19:09:57,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 19:09:57,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-12-07 19:09:57,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573605070] [2019-12-07 19:09:57,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 19:09:57,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:09:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 19:09:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-12-07 19:09:57,201 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 7 states. [2019-12-07 19:09:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:09:57,405 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-12-07 19:09:57,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 19:09:57,405 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-12-07 19:09:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:09:57,406 INFO L225 Difference]: With dead ends: 68 [2019-12-07 19:09:57,406 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 19:09:57,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-12-07 19:09:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 19:09:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2019-12-07 19:09:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 19:09:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-12-07 19:09:57,413 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 13 [2019-12-07 19:09:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:09:57,413 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-12-07 19:09:57,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 19:09:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-12-07 19:09:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 19:09:57,413 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:09:57,414 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:09:57,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 19:09:57,614 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:09:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:09:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1326513248, now seen corresponding path program 1 times [2019-12-07 19:09:57,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:09:57,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389790644] [2019-12-07 19:09:57,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 19:09:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:57,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 19:09:57,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:57,712 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:57,717 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:57,720 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2019-12-07 19:09:57,720 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 19:09:57,729 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 19:09:57,729 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 19:09:57,729 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:24 [2019-12-07 19:09:57,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:09:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:09:57,769 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:09:57,919 INFO L377 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 24 treesize of output 22 [2019-12-07 19:09:57,924 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 19:09:57,926 INFO L614 ElimStorePlain]: treesize reduction 33, result has 2.9 percent of original size [2019-12-07 19:09:57,926 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 19:09:57,927 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 19:09:57,927 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 19:09:57,928 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:1 [2019-12-07 19:09:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:09:57,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389790644] [2019-12-07 19:09:57,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:09:57,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-12-07 19:09:57,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235598430] [2019-12-07 19:09:57,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 19:09:57,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:09:57,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 19:09:57,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 19:09:57,930 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2019-12-07 19:09:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:09:58,281 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-12-07 19:09:58,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 19:09:58,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-12-07 19:09:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:09:58,285 INFO L225 Difference]: With dead ends: 38 [2019-12-07 19:09:58,286 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 19:09:58,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-12-07 19:09:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 19:09:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-12-07 19:09:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 19:09:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-12-07 19:09:58,291 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2019-12-07 19:09:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:09:58,292 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-12-07 19:09:58,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 19:09:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-12-07 19:09:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 19:09:58,292 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:09:58,293 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:09:58,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-12-07 19:09:58,494 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:09:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:09:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash 131437949, now seen corresponding path program 1 times [2019-12-07 19:09:58,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:09:58,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73080071] [2019-12-07 19:09:58,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 19:09:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:58,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 19:09:58,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:58,623 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:58,625 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:58,625 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2019-12-07 19:09:58,626 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 19:09:58,636 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 19:09:58,636 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 19:09:58,636 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:30 [2019-12-07 19:09:58,678 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:58,679 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:58,681 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:58,682 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:58,683 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:58,684 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:58,685 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 19:09:58,686 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 19:09:58,703 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 19:09:58,703 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 89 [2019-12-07 19:09:58,705 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 19:09:58,770 INFO L614 ElimStorePlain]: treesize reduction 32, result has 73.3 percent of original size [2019-12-07 19:09:58,771 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 19:09:58,771 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:88 [2019-12-07 19:09:58,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:09:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 19:09:58,905 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:09:59,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73080071] [2019-12-07 19:09:59,388 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2019-12-07 19:09:59,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [495860143] [2019-12-07 19:09:59,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:09:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:59,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 19:09:59,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:59,539 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3e085c82 [2019-12-07 19:09:59,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332572961] [2019-12-07 19:09:59,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc9814c2-b0f9-49fb-a0eb-8e8de201bb62/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:09:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:09:59,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 19:09:59,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:09:59,624 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3e085c82 [2019-12-07 19:09:59,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:09:59,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 19:09:59,624 ERROR L206 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2019-12-07 19:09:59,624 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 19:10:00,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:10:00,261 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 19:10:00,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:10:00 BoogieIcfgContainer [2019-12-07 19:10:00,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:10:00,263 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:10:00,263 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:10:00,264 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:10:00,264 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:09:56" (3/4) ... [2019-12-07 19:10:00,269 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 19:10:00,269 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:10:00,270 INFO L168 Benchmark]: Toolchain (without parser) took 4662.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 952.4 MB in the beginning and 890.7 MB in the end (delta: 61.7 MB). Peak memory consumption was 203.8 MB. Max. memory is 11.5 GB. [2019-12-07 19:10:00,271 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:10:00,272 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.32 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:10:00,272 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -190.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-12-07 19:10:00,273 INFO L168 Benchmark]: Boogie Preprocessor took 19.91 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:10:00,274 INFO L168 Benchmark]: RCFGBuilder took 224.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:10:00,274 INFO L168 Benchmark]: TraceAbstraction took 4190.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 890.7 MB in the end (delta: 223.4 MB). Peak memory consumption was 223.4 MB. Max. memory is 11.5 GB. [2019-12-07 19:10:00,274 INFO L168 Benchmark]: Witness Printer took 5.78 ms. Allocated memory is still 1.2 GB. Free memory is still 890.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:10:00,277 INFO L335 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 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 160.32 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 57.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -190.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.91 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 224.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4190.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 890.7 MB in the end (delta: 223.4 MB). Peak memory consumption was 223.4 MB. Max. memory is 11.5 GB. * Witness Printer took 5.78 ms. Allocated memory is still 1.2 GB. Free memory is still 890.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] i=0 [L26] COND TRUE i