./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/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 8ebef2b0378358da575e0f9ebb3d2a9deec2200b ....................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/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 8ebef2b0378358da575e0f9ebb3d2a9deec2200b ............................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:07:32,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:07:32,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:07:32,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:07:32,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:07:32,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:07:32,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:07:32,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:07:32,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:07:32,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:07:32,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:07:32,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:07:32,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:07:32,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:07:32,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:07:32,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:07:32,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:07:32,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:07:32,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:07:32,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:07:32,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:07:32,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:07:32,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:07:32,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:07:32,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:07:32,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:07:32,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:07:32,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:07:32,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:07:32,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:07:32,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:07:32,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:07:32,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:07:32,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:07:32,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:07:32,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:07:32,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:07:32,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:07:32,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:07:32,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:07:32,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:07:32,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 17:07:32,950 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:07:32,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:07:32,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:07:32,950 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:07:32,951 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:07:32,951 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:07:32,951 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:07:32,951 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:07:32,951 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:07:32,951 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:07:32,951 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:07:32,951 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:07:32,952 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:07:32,952 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:07:32,952 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:07:32,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:07:32,952 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:07:32,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:07:32,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:07:32,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:07:32,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:07:32,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:07:32,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:07:32,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:07:32,953 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:07:32,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:07:32,954 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:07:32,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:07:32,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:07:32,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:07:32,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:07:32,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:07:32,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:07:32,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:07:32,955 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:07:32,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:07:32,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:07:32,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:07:32,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:07:32,955 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_464ec381-0083-4d00-b7fb-7535fad8af11/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ebef2b0378358da575e0f9ebb3d2a9deec2200b [2020-12-09 17:07:33,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:07:33,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:07:33,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:07:33,155 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:07:33,156 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:07:33,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c [2020-12-09 17:07:33,200 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data/12435a07e/7b926989d6ba4b2a919065a71af07d37/FLAGca882e359 [2020-12-09 17:07:33,566 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:07:33,567 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c [2020-12-09 17:07:33,571 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data/12435a07e/7b926989d6ba4b2a919065a71af07d37/FLAGca882e359 [2020-12-09 17:07:33,581 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data/12435a07e/7b926989d6ba4b2a919065a71af07d37 [2020-12-09 17:07:33,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:07:33,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:07:33,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:07:33,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:07:33,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:07:33,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3caa858e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33, skipping insertion in model container [2020-12-09 17:07:33,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:07:33,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:07:33,703 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c[712,725] [2020-12-09 17:07:33,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:07:33,720 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:07:33,728 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c[712,725] [2020-12-09 17:07:33,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:07:33,747 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:07:33,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33 WrapperNode [2020-12-09 17:07:33,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:07:33,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:07:33,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:07:33,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:07:33,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:07:33,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:07:33,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:07:33,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:07:33,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... [2020-12-09 17:07:33,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:07:33,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:07:33,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:07:33,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:07:33,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:07:33,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:07:33,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:07:33,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:07:33,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:07:34,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:07:34,005 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 17:07:34,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:07:34 BoogieIcfgContainer [2020-12-09 17:07:34,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:07:34,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:07:34,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:07:34,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:07:34,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:07:33" (1/3) ... [2020-12-09 17:07:34,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12040f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:07:34, skipping insertion in model container [2020-12-09 17:07:34,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:33" (2/3) ... [2020-12-09 17:07:34,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12040f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:07:34, skipping insertion in model container [2020-12-09 17:07:34,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:07:34" (3/3) ... [2020-12-09 17:07:34,013 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound20.c [2020-12-09 17:07:34,023 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:07:34,025 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 17:07:34,033 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 17:07:34,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:07:34,051 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:07:34,051 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:07:34,051 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:07:34,051 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:07:34,051 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:07:34,051 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:07:34,051 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:07:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 17:07:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:07:34,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:07:34,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 17:07:34,065 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:07:34,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:07:34,069 INFO L82 PathProgramCache]: Analyzing trace with hash 71331668, now seen corresponding path program 1 times [2020-12-09 17:07:34,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:07:34,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074998807] [2020-12-09 17:07:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:07:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:07:34,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:07:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:07:34,169 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:07:34,187 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 17:07:34,188 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:07:34,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:07:34,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:07:34 BoogieIcfgContainer [2020-12-09 17:07:34,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:07:34,205 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:07:34,205 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:07:34,205 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:07:34,206 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:07:34" (3/4) ... [2020-12-09 17:07:34,208 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 17:07:34,208 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:07:34,210 INFO L168 Benchmark]: Toolchain (without parser) took 625.14 ms. Allocated memory is still 86.0 MB. Free memory was 55.7 MB in the beginning and 61.0 MB in the end (delta: -5.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:07:34,210 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 86.0 MB. Free memory was 63.2 MB in the beginning and 63.1 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:07:34,211 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.74 ms. Allocated memory is still 86.0 MB. Free memory was 55.5 MB in the beginning and 64.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:07:34,211 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.26 ms. Allocated memory is still 86.0 MB. Free memory was 64.4 MB in the beginning and 62.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:07:34,212 INFO L168 Benchmark]: Boogie Preprocessor took 14.66 ms. Allocated memory is still 86.0 MB. Free memory was 62.8 MB in the beginning and 61.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:07:34,213 INFO L168 Benchmark]: RCFGBuilder took 219.65 ms. Allocated memory is still 86.0 MB. Free memory was 61.8 MB in the beginning and 48.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:07:34,213 INFO L168 Benchmark]: TraceAbstraction took 197.03 ms. Allocated memory is still 86.0 MB. Free memory was 48.1 MB in the beginning and 61.4 MB in the end (delta: -13.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-12-09 17:07:34,213 INFO L168 Benchmark]: Witness Printer took 3.19 ms. Allocated memory is still 86.0 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:07:34,216 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 86.0 MB. Free memory was 63.2 MB in the beginning and 63.1 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 162.74 ms. Allocated memory is still 86.0 MB. Free memory was 55.5 MB in the beginning and 64.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.26 ms. Allocated memory is still 86.0 MB. Free memory was 64.4 MB in the beginning and 62.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.66 ms. Allocated memory is still 86.0 MB. Free memory was 62.8 MB in the beginning and 61.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 219.65 ms. Allocated memory is still 86.0 MB. Free memory was 61.8 MB in the beginning and 48.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 197.03 ms. Allocated memory is still 86.0 MB. Free memory was 48.1 MB in the beginning and 61.4 MB in the end (delta: -13.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * Witness Printer took 3.19 ms. Allocated memory is still 86.0 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<20 [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:07:35,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:07:35,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:07:35,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:07:35,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:07:35,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:07:35,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:07:35,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:07:35,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:07:35,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:07:35,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:07:35,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:07:35,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:07:35,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:07:35,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:07:35,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:07:35,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:07:35,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:07:35,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:07:35,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:07:35,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:07:35,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:07:35,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:07:35,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:07:35,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:07:35,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:07:35,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:07:35,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:07:35,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:07:35,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:07:35,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:07:35,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:07:35,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:07:35,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:07:35,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:07:35,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:07:35,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:07:35,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:07:35,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:07:35,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:07:35,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:07:35,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 17:07:35,842 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:07:35,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:07:35,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:07:35,843 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:07:35,843 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:07:35,843 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:07:35,844 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:07:35,844 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:07:35,844 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:07:35,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:07:35,844 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:07:35,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:07:35,846 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:07:35,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:07:35,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:07:35,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 17:07:35,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:07:35,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:07:35,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:07:35,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:07:35,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:07:35,853 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 17:07:35,853 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 17:07:35,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:07:35,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:07:35,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:07:35,854 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ebef2b0378358da575e0f9ebb3d2a9deec2200b [2020-12-09 17:07:36,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:07:36,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:07:36,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:07:36,111 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:07:36,112 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:07:36,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c [2020-12-09 17:07:36,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data/c04c5b1d2/3af1e2c848444d6696128a0b62da9bbb/FLAGb842219db [2020-12-09 17:07:36,522 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:07:36,523 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c [2020-12-09 17:07:36,528 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data/c04c5b1d2/3af1e2c848444d6696128a0b62da9bbb/FLAGb842219db [2020-12-09 17:07:36,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/data/c04c5b1d2/3af1e2c848444d6696128a0b62da9bbb [2020-12-09 17:07:36,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:07:36,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:07:36,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:07:36,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:07:36,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:07:36,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce8ccf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36, skipping insertion in model container [2020-12-09 17:07:36,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:07:36,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:07:36,666 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c[712,725] [2020-12-09 17:07:36,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:07:36,694 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:07:36,706 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c[712,725] [2020-12-09 17:07:36,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:07:36,731 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:07:36,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36 WrapperNode [2020-12-09 17:07:36,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:07:36,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:07:36,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:07:36,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:07:36,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:07:36,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:07:36,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:07:36,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:07:36,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... [2020-12-09 17:07:36,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:07:36,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:07:36,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:07:36,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:07:36,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:07:36,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 17:07:36,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:07:36,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:07:36,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:07:43,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:07:43,049 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 17:07:43,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:07:43 BoogieIcfgContainer [2020-12-09 17:07:43,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:07:43,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:07:43,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:07:43,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:07:43,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:07:36" (1/3) ... [2020-12-09 17:07:43,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fee75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:07:43, skipping insertion in model container [2020-12-09 17:07:43,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:07:36" (2/3) ... [2020-12-09 17:07:43,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fee75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:07:43, skipping insertion in model container [2020-12-09 17:07:43,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:07:43" (3/3) ... [2020-12-09 17:07:43,059 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound20.c [2020-12-09 17:07:43,072 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:07:43,075 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 17:07:43,083 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 17:07:43,101 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:07:43,101 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:07:43,101 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:07:43,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:07:43,102 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:07:43,102 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:07:43,102 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:07:43,102 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:07:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-09 17:07:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:07:43,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:07:43,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:07:43,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:07:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:07:43,122 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-09 17:07:43,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:07:43,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250506423] [2020-12-09 17:07:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/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 [2020-12-09 17:07:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:07:45,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:07:45,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:07:55,364 WARN L197 SmtUtils]: Spent 9.17 s on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 17:08:05,619 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 v_prenex_1) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse1 ULTIMATE.start_main_~a~0) .cse1)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)))) is different from false [2020-12-09 17:08:11,751 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 v_prenex_1) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from false [2020-12-09 17:08:13,781 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 v_prenex_1) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from true [2020-12-09 17:08:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:08:13,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:08:13,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250506423] [2020-12-09 17:08:13,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:08:13,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:08:13,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344372981] [2020-12-09 17:08:13,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:08:13,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:08:13,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:08:13,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=7, Unknown=3, NotChecked=10, Total=30 [2020-12-09 17:08:13,801 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 6 states. [2020-12-09 17:08:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:08:21,687 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-12-09 17:08:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:08:21,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-12-09 17:08:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:08:21,710 INFO L225 Difference]: With dead ends: 35 [2020-12-09 17:08:21,710 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 17:08:21,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=10, Invalid=7, Unknown=3, NotChecked=10, Total=30 [2020-12-09 17:08:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 17:08:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-09 17:08:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 17:08:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-09 17:08:21,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2020-12-09 17:08:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:08:21,737 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-09 17:08:21,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:08:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-09 17:08:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 17:08:21,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:08:21,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:08:21,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 17:08:21,939 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:08:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:08:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1806862075, now seen corresponding path program 1 times [2020-12-09 17:08:21,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:08:21,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788189377] [2020-12-09 17:08:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/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 [2020-12-09 17:08:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:08:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 17:08:22,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:08:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:08:22,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:08:22,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788189377] [2020-12-09 17:08:22,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:08:22,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:08:22,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055816780] [2020-12-09 17:08:22,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:08:22,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:08:22,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:08:22,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:08:22,315 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-12-09 17:08:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:08:25,321 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-09 17:08:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:08:25,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 17:08:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:08:25,323 INFO L225 Difference]: With dead ends: 19 [2020-12-09 17:08:25,323 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 17:08:25,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:08:25,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 17:08:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 17:08:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 17:08:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-09 17:08:25,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2020-12-09 17:08:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:08:25,326 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-09 17:08:25,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:08:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-09 17:08:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 17:08:25,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:08:25,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:08:25,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 17:08:25,529 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:08:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:08:25,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1274494228, now seen corresponding path program 1 times [2020-12-09 17:08:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:08:25,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063011547] [2020-12-09 17:08:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/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 [2020-12-09 17:08:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:08:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:08:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:08:27,918 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from false [2020-12-09 17:08:29,966 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from true [2020-12-09 17:08:32,020 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from false [2020-12-09 17:08:34,069 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from true [2020-12-09 17:08:40,232 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) is different from false [2020-12-09 17:08:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:08:40,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:08:40,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063011547] [2020-12-09 17:08:40,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:08:40,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:08:40,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88803192] [2020-12-09 17:08:40,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:08:40,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:08:40,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:08:40,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=2, Unknown=5, NotChecked=6, Total=20 [2020-12-09 17:08:40,243 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-12-09 17:08:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:08:40,245 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-09 17:08:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:08:40,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 17:08:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:08:40,246 INFO L225 Difference]: With dead ends: 19 [2020-12-09 17:08:40,246 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 17:08:40,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=7, Invalid=2, Unknown=5, NotChecked=6, Total=20 [2020-12-09 17:08:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 17:08:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 17:08:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 17:08:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 17:08:40,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2020-12-09 17:08:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:08:40,249 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 17:08:40,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:08:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 17:08:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:08:40,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:08:40,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:08:40,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 17:08:40,452 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:08:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:08:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-09 17:08:40,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:08:40,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841878429] [2020-12-09 17:08:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/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 [2020-12-09 17:08:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:08:43,269 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:08:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:08:52,945 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:08:53,012 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 17:08:53,012 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:08:53,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 17:08:53,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:08:53 BoogieIcfgContainer [2020-12-09 17:08:53,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:08:53,264 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:08:53,264 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:08:53,264 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:08:53,265 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:07:43" (3/4) ... [2020-12-09 17:08:53,266 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 17:08:53,293 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_464ec381-0083-4d00-b7fb-7535fad8af11/bin/utaipan/witness.graphml [2020-12-09 17:08:53,294 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:08:53,294 INFO L168 Benchmark]: Toolchain (without parser) took 76753.42 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 36.0 MB in the beginning and 48.1 MB in the end (delta: -12.0 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-12-09 17:08:53,295 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 39.3 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:08:53,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.40 ms. Allocated memory is still 56.6 MB. Free memory was 35.7 MB in the beginning and 40.7 MB in the end (delta: -5.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:08:53,296 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.12 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 40.7 MB in the beginning and 59.4 MB in the end (delta: -18.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:08:53,296 INFO L168 Benchmark]: Boogie Preprocessor took 22.60 ms. Allocated memory is still 75.5 MB. Free memory was 59.4 MB in the beginning and 58.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:08:53,296 INFO L168 Benchmark]: RCFGBuilder took 6247.79 ms. Allocated memory is still 75.5 MB. Free memory was 58.1 MB in the beginning and 45.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:08:53,297 INFO L168 Benchmark]: TraceAbstraction took 70211.24 ms. Allocated memory is still 75.5 MB. Free memory was 44.8 MB in the beginning and 50.1 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:08:53,297 INFO L168 Benchmark]: Witness Printer took 29.58 ms. Allocated memory is still 75.5 MB. Free memory was 50.1 MB in the beginning and 48.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:08:53,299 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 39.3 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 190.40 ms. Allocated memory is still 56.6 MB. Free memory was 35.7 MB in the beginning and 40.7 MB in the end (delta: -5.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.12 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 40.7 MB in the beginning and 59.4 MB in the end (delta: -18.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.60 ms. Allocated memory is still 75.5 MB. Free memory was 59.4 MB in the beginning and 58.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 6247.79 ms. Allocated memory is still 75.5 MB. Free memory was 58.1 MB in the beginning and 45.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 70211.24 ms. Allocated memory is still 75.5 MB. Free memory was 44.8 MB in the beginning and 50.1 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 29.58 ms. Allocated memory is still 75.5 MB. Free memory was 50.1 MB in the beginning and 48.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<20 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x > r)) [L37] x = x - r [L38] r = r + 1 VAL [counter=1] [L32] EXPR counter++ VAL [counter=2] [L32] COND TRUE counter++<20 [L17] COND TRUE !(cond) VAL [counter=2] [L19] reach_error() VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 70.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 4 SDslu, 45 SDs, 0 SdLazy, 9 SolverSat, 0 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 10.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 43.1s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 19 ConstructedInterpolants, 3 QuantifiedInterpolants, 1921 SizeOfPredicates, 13 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 incorrect! Received shutdown request...