./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/half.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/half.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 41a31ab8e42c0ba8256484457a81b8567cde71c6 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:37:24,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:37:24,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:37:24,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:37:24,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:37:24,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:37:24,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:37:24,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:37:24,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:37:24,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:37:24,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:37:24,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:37:24,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:37:24,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:37:24,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:37:24,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:37:24,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:37:24,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:37:24,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:37:24,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:37:24,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:37:24,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:37:24,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:37:24,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:37:24,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:37:24,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:37:24,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:37:24,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:37:24,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:37:24,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:37:24,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:37:24,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:37:24,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:37:24,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:37:24,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:37:24,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:37:24,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:37:24,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:37:24,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:37:24,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:37:24,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:37:24,883 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:37:24,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:37:24,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:37:24,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:37:24,942 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:37:24,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:37:24,943 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:37:24,943 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:37:24,944 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:37:24,944 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:37:24,944 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:37:24,946 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:37:24,946 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:37:24,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:37:24,947 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:37:24,947 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:37:24,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:37:24,948 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:37:24,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:37:24,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:37:24,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:37:24,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:37:24,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:37:24,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:37:24,950 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:37:24,950 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:37:24,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:37:24,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:37:24,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:37:24,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:37:24,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:37:24,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:37:24,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:37:24,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:37:24,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:37:24,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:37:24,954 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:37:24,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:37:24,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:37:24,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:37:24,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:37:24,955 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41a31ab8e42c0ba8256484457a81b8567cde71c6 [2020-11-28 07:37:25,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:37:25,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:37:25,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:37:25,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:37:25,355 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:37:25,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/../../sv-benchmarks/c/loop-new/half.i [2020-11-28 07:37:25,434 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/data/30986e428/c494a89c0d944911b4363a2520aeab8e/FLAG52db2cc68 [2020-11-28 07:37:26,098 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:37:26,100 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/sv-benchmarks/c/loop-new/half.i [2020-11-28 07:37:26,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/data/30986e428/c494a89c0d944911b4363a2520aeab8e/FLAG52db2cc68 [2020-11-28 07:37:26,438 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/data/30986e428/c494a89c0d944911b4363a2520aeab8e [2020-11-28 07:37:26,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:37:26,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:37:26,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:26,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:37:26,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:37:26,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e72846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26, skipping insertion in model container [2020-11-28 07:37:26,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:37:26,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:37:26,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:26,774 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:37:26,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:26,828 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:37:26,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26 WrapperNode [2020-11-28 07:37:26,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:26,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:26,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:37:26,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:37:26,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:26,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:37:26,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:37:26,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:37:26,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... [2020-11-28 07:37:26,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:37:26,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:37:26,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:37:26,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:37:26,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:37:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:37:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:37:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:37:27,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:37:27,650 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:37:27,650 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:37:27,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:27 BoogieIcfgContainer [2020-11-28 07:37:27,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:37:27,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:37:27,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:37:27,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:37:27,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:37:26" (1/3) ... [2020-11-28 07:37:27,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196d66e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:27, skipping insertion in model container [2020-11-28 07:37:27,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:26" (2/3) ... [2020-11-28 07:37:27,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196d66e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:27, skipping insertion in model container [2020-11-28 07:37:27,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:27" (3/3) ... [2020-11-28 07:37:27,665 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2020-11-28 07:37:27,677 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:37:27,682 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:37:27,695 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:37:27,732 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:37:27,733 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:37:27,733 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:37:27,733 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:37:27,733 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:37:27,734 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:37:27,734 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:37:27,734 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:37:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-28 07:37:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:37:27,753 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:27,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:37:27,754 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1996542443, now seen corresponding path program 1 times [2020-11-28 07:37:27,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:27,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967510991] [2020-11-28 07:37:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:28,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967510991] [2020-11-28 07:37:28,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:28,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:37:28,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465179593] [2020-11-28 07:37:28,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:37:28,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:28,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:37:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:37:28,064 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 5 states. [2020-11-28 07:37:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:28,140 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-11-28 07:37:28,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:37:28,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-28 07:37:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:28,158 INFO L225 Difference]: With dead ends: 24 [2020-11-28 07:37:28,159 INFO L226 Difference]: Without dead ends: 8 [2020-11-28 07:37:28,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:37:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-28 07:37:28,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-28 07:37:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 07:37:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-11-28 07:37:28,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-11-28 07:37:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:28,240 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-11-28 07:37:28,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:37:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-11-28 07:37:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:37:28,241 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:28,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:28,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:37:28,241 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:28,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1760400193, now seen corresponding path program 1 times [2020-11-28 07:37:28,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:28,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488279629] [2020-11-28 07:37:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:28,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488279629] [2020-11-28 07:37:28,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313465338] [2020-11-28 07:37:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:28,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 07:37:28,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:28,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:37:28,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 07:37:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:28,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:28,632 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:37:28,720 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 3, 3, 2, 1] term [2020-11-28 07:37:28,724 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:37:28,729 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-11-28 07:37:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:28,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [673667734] [2020-11-28 07:37:28,887 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:28,888 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:28,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:28,902 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:28,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:29,431 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 112 [2020-11-28 07:37:29,541 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:29,691 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-11-28 07:37:29,878 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-11-28 07:37:30,147 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-11-28 07:37:30,149 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:30,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:30,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 10 [2020-11-28 07:37:30,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231975602] [2020-11-28 07:37:30,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:37:30,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:30,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:37:30,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:37:30,153 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 10 states. [2020-11-28 07:37:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:30,283 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-11-28 07:37:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:37:30,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2020-11-28 07:37:30,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:30,285 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:37:30,285 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 07:37:30,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:37:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 07:37:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 07:37:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 07:37:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-28 07:37:30,290 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-11-28 07:37:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:30,290 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-28 07:37:30,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:37:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-28 07:37:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:37:30,291 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:30,291 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:30,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:37:30,508 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:30,509 INFO L82 PathProgramCache]: Analyzing trace with hash 564477823, now seen corresponding path program 2 times [2020-11-28 07:37:30,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:30,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415894597] [2020-11-28 07:37:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:30,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415894597] [2020-11-28 07:37:30,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833624771] [2020-11-28 07:37:30,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:30,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 07:37:30,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:37:30,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-28 07:37:30,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:30,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:31,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577947361] [2020-11-28 07:37:31,302 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:31,302 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:31,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:31,303 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:31,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:31,557 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:31,712 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-11-28 07:37:31,850 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-11-28 07:37:32,092 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:32,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:32,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 16 [2020-11-28 07:37:32,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078413960] [2020-11-28 07:37:32,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 07:37:32,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 07:37:32,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-28 07:37:32,094 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 16 states. [2020-11-28 07:37:32,615 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-11-28 07:37:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:32,768 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-28 07:37:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:37:32,776 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 9 [2020-11-28 07:37:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:32,777 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:37:32,777 INFO L226 Difference]: Without dead ends: 14 [2020-11-28 07:37:32,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2020-11-28 07:37:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-28 07:37:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-28 07:37:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 07:37:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-28 07:37:32,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2020-11-28 07:37:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:32,783 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-28 07:37:32,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 07:37:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-28 07:37:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:37:32,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:32,784 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:32,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:32,997 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:32,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:32,997 INFO L82 PathProgramCache]: Analyzing trace with hash -566635265, now seen corresponding path program 3 times [2020-11-28 07:37:32,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:32,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240216181] [2020-11-28 07:37:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:33,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240216181] [2020-11-28 07:37:33,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974256011] [2020-11-28 07:37:33,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:33,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 07:37:33,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:37:33,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-28 07:37:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:33,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:34,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002345622] [2020-11-28 07:37:34,558 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:34,558 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:34,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:34,559 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:34,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:34,823 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:34,974 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-11-28 07:37:35,248 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-11-28 07:37:35,403 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:35,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:35,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 28 [2020-11-28 07:37:35,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558543329] [2020-11-28 07:37:35,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-28 07:37:35,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:35,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-28 07:37:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2020-11-28 07:37:35,406 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 28 states. [2020-11-28 07:37:36,487 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-11-28 07:37:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:36,926 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-11-28 07:37:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-28 07:37:36,927 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 13 [2020-11-28 07:37:36,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:36,927 INFO L225 Difference]: With dead ends: 33 [2020-11-28 07:37:36,927 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 07:37:36,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=453, Invalid=2199, Unknown=0, NotChecked=0, Total=2652 [2020-11-28 07:37:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 07:37:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 07:37:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:37:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-11-28 07:37:36,936 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2020-11-28 07:37:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:36,936 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-11-28 07:37:36,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-28 07:37:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-11-28 07:37:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 07:37:36,937 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:36,937 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:37,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:37,153 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1257160703, now seen corresponding path program 4 times [2020-11-28 07:37:37,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:37,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360874187] [2020-11-28 07:37:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:37,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360874187] [2020-11-28 07:37:37,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192624632] [2020-11-28 07:37:37,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:37,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-28 07:37:37,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:37,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-11-28 07:37:37,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [141629127] [2020-11-28 07:37:37,846 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:37,846 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:37,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:37,848 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:37,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:38,044 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:38,222 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-11-28 07:37:38,572 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:38,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:38,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 2] total 19 [2020-11-28 07:37:38,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50574150] [2020-11-28 07:37:38,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-28 07:37:38,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:38,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-28 07:37:38,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2020-11-28 07:37:38,574 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2020-11-28 07:37:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:38,575 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-28 07:37:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:37:38,576 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-11-28 07:37:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:38,576 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:37:38,576 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:37:38,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2020-11-28 07:37:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:37:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:37:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:37:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:37:38,577 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-11-28 07:37:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:38,578 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:37:38,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-28 07:37:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:37:38,578 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:37:38,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:38,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:37:38,832 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:37:38,832 INFO L270 CegarLoopResult]: At program point L29-3(lines 29 33) the Hoare annotation is: false [2020-11-28 07:37:38,832 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:37:38,833 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-11-28 07:37:38,833 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:37:38,833 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-28 07:37:38,833 INFO L270 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) [2020-11-28 07:37:38,833 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-28 07:37:38,833 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-28 07:37:38,833 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-28 07:37:38,834 INFO L270 CegarLoopResult]: At program point L35(lines 24 36) the Hoare annotation is: (or (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (and (= ULTIMATE.start_main_~n~0 0) (= ULTIMATE.start_main_~i~0 0))) [2020-11-28 07:37:38,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:37:38 BoogieIcfgContainer [2020-11-28 07:37:38,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:37:38,850 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:37:38,850 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:37:38,852 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:37:38,853 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:27" (3/4) ... [2020-11-28 07:37:38,856 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:37:38,876 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-28 07:37:38,876 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-28 07:37:38,876 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:37:38,877 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:37:38,938 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a7bf597f-8ea1-4235-b04c-dfb23077d547/bin/utaipan/witness.graphml [2020-11-28 07:37:38,941 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:37:38,942 INFO L168 Benchmark]: Toolchain (without parser) took 12497.47 ms. Allocated memory was 115.3 MB in the beginning and 167.8 MB in the end (delta: 52.4 MB). Free memory was 86.0 MB in the beginning and 59.2 MB in the end (delta: 26.8 MB). Peak memory consumption was 78.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:38,944 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 79.7 MB. Free memory was 37.7 MB in the beginning and 37.6 MB in the end (delta: 40.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:38,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.73 ms. Allocated memory is still 115.3 MB. Free memory was 85.7 MB in the beginning and 91.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:38,945 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.41 ms. Allocated memory is still 115.3 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:38,948 INFO L168 Benchmark]: Boogie Preprocessor took 51.17 ms. Allocated memory is still 115.3 MB. Free memory was 90.1 MB in the beginning and 89.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:38,949 INFO L168 Benchmark]: RCFGBuilder took 721.55 ms. Allocated memory is still 115.3 MB. Free memory was 89.1 MB in the beginning and 73.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:38,950 INFO L168 Benchmark]: TraceAbstraction took 11194.94 ms. Allocated memory was 115.3 MB in the beginning and 167.8 MB in the end (delta: 52.4 MB). Free memory was 73.0 MB in the beginning and 61.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 64.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:38,950 INFO L168 Benchmark]: Witness Printer took 90.85 ms. Allocated memory is still 167.8 MB. Free memory was 61.3 MB in the beginning and 59.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:38,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 79.7 MB. Free memory was 37.7 MB in the beginning and 37.6 MB in the end (delta: 40.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 381.73 ms. Allocated memory is still 115.3 MB. Free memory was 85.7 MB in the beginning and 91.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.41 ms. Allocated memory is still 115.3 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.17 ms. Allocated memory is still 115.3 MB. Free memory was 90.1 MB in the beginning and 89.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 721.55 ms. Allocated memory is still 115.3 MB. Free memory was 89.1 MB in the beginning and 73.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11194.94 ms. Allocated memory was 115.3 MB in the beginning and 167.8 MB in the end (delta: 52.4 MB). Free memory was 73.0 MB in the beginning and 61.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 64.9 MB. Max. memory is 16.1 GB. * Witness Printer took 90.85 ms. Allocated memory is still 167.8 MB. Free memory was 61.3 MB in the beginning and 59.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: !(0 == cond) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: !(0 == cond) || (n == 0 && i == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.0s, OverallIterations: 5, TraceHistogramMax: 15, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 54 SDslu, 96 SDs, 0 SdLazy, 243 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 215 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 17 HoareAnnotationTreeSize, 3 FomulaSimplifications, 23 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 143 ConstructedInterpolants, 0 QuantifiedInterpolants, 13964 SizeOfPredicates, 21 NumberOfNonLiveVariables, 280 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 105/465 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...