./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF --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 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:54:05,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:54:05,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:54:05,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:54:05,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:54:05,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:54:05,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:54:05,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:54:05,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:54:05,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:54:05,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:54:05,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:54:05,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:54:05,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:54:05,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:54:05,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:54:05,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:54:05,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:54:05,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:54:05,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:54:05,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:54:05,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:54:05,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:54:05,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:54:05,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:54:05,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:54:05,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:54:05,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:54:05,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:54:05,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:54:05,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:54:05,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:54:05,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:54:05,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:54:05,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:54:05,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:54:05,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:54:05,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:54:05,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:54:05,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:54:05,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:54:05,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:54:06,012 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:54:06,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:54:06,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:54:06,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:54:06,014 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:54:06,014 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:54:06,014 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:54:06,014 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:54:06,020 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:54:06,021 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:54:06,022 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:54:06,022 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:54:06,022 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:54:06,022 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:54:06,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:54:06,023 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:54:06,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:54:06,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:54:06,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:54:06,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:54:06,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:54:06,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:54:06,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:54:06,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:54:06,025 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:54:06,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:54:06,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:54:06,026 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:54:06,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:54:06,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:54:06,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:54:06,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:54:06,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:54:06,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:54:06,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:54:06,029 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:54:06,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:54:06,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:54:06,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:54:06,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:54:06,030 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_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 [2021-11-12 22:54:06,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:54:06,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:54:06,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:54:06,310 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:54:06,311 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:54:06,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-11-12 22:54:06,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data/db9584660/7279e39e66814b6ea64d09014b7249a5/FLAG4a300f9c8 [2021-11-12 22:54:06,933 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:54:06,934 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-11-12 22:54:06,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data/db9584660/7279e39e66814b6ea64d09014b7249a5/FLAG4a300f9c8 [2021-11-12 22:54:07,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data/db9584660/7279e39e66814b6ea64d09014b7249a5 [2021-11-12 22:54:07,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:54:07,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:54:07,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:07,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:54:07,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:54:07,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77950934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07, skipping insertion in model container [2021-11-12 22:54:07,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:54:07,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:54:07,526 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-11-12 22:54:07,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:07,560 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:54:07,575 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-11-12 22:54:07,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:07,612 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:54:07,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07 WrapperNode [2021-11-12 22:54:07,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:07,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:54:07,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:54:07,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:54:07,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:54:07,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:54:07,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:54:07,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:54:07,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:54:07,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:54:07,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:54:07,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:54:07,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (1/1) ... [2021-11-12 22:54:07,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:54:07,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:07,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:54:07,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:54:07,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:54:07,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:54:07,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:54:07,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:54:08,071 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:54:08,072 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:54:08,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:08 BoogieIcfgContainer [2021-11-12 22:54:08,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:54:08,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:54:08,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:54:08,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:54:08,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:54:07" (1/3) ... [2021-11-12 22:54:08,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765dec38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:54:08, skipping insertion in model container [2021-11-12 22:54:08,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:07" (2/3) ... [2021-11-12 22:54:08,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765dec38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:54:08, skipping insertion in model container [2021-11-12 22:54:08,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:08" (3/3) ... [2021-11-12 22:54:08,084 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-11-12 22:54:08,090 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:54:08,090 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:54:08,140 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:54:08,148 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:54:08,148 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:54:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 22:54:08,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:08,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 22:54:08,168 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:08,173 INFO L85 PathProgramCache]: Analyzing trace with hash 80052486, now seen corresponding path program 1 times [2021-11-12 22:54:08,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:08,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110634173] [2021-11-12 22:54:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:08,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:08,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:08,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110634173] [2021-11-12 22:54:08,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110634173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:08,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:08,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:54:08,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105730138] [2021-11-12 22:54:08,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:08,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:54:08,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:08,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:54:08,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:54:08,446 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:08,479 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-12 22:54:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:54:08,483 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-12 22:54:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:08,491 INFO L225 Difference]: With dead ends: 15 [2021-11-12 22:54:08,491 INFO L226 Difference]: Without dead ends: 7 [2021-11-12 22:54:08,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:54:08,504 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:08,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 3 Unknown, 0 Unchecked, 0.31ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 17.79ms Time] [2021-11-12 22:54:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-12 22:54:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-12 22:54:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-11-12 22:54:08,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-11-12 22:54:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:08,539 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-11-12 22:54:08,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-11-12 22:54:08,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 22:54:08,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:08,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 22:54:08,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:54:08,543 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1807980756, now seen corresponding path program 1 times [2021-11-12 22:54:08,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:08,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284353232] [2021-11-12 22:54:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:08,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:54:08,639 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:54:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:54:08,731 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 22:54:08,732 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:54:08,734 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:54:08,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:54:08,751 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-12 22:54:08,754 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:54:08,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:54:08 BoogieIcfgContainer [2021-11-12 22:54:08,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:54:08,790 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:54:08,790 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:54:08,790 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:54:08,791 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:08" (3/4) ... [2021-11-12 22:54:08,794 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 22:54:08,795 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:54:08,796 INFO L158 Benchmark]: Toolchain (without parser) took 1499.57ms. Allocated memory is still 130.0MB. Free memory was 93.2MB in the beginning and 64.1MB in the end (delta: 29.1MB). Peak memory consumption was 26.4MB. Max. memory is 16.1GB. [2021-11-12 22:54:08,796 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 130.0MB. Free memory was 103.0MB in the beginning and 103.0MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:54:08,797 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.04ms. Allocated memory is still 130.0MB. Free memory was 93.0MB in the beginning and 104.1MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:54:08,798 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.26ms. Allocated memory is still 130.0MB. Free memory was 103.9MB in the beginning and 102.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:54:08,799 INFO L158 Benchmark]: Boogie Preprocessor took 45.96ms. Allocated memory is still 130.0MB. Free memory was 102.0MB in the beginning and 101.2MB in the end (delta: 777.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:54:08,799 INFO L158 Benchmark]: RCFGBuilder took 372.33ms. Allocated memory is still 130.0MB. Free memory was 101.2MB in the beginning and 89.4MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:54:08,800 INFO L158 Benchmark]: TraceAbstraction took 713.24ms. Allocated memory is still 130.0MB. Free memory was 89.4MB in the beginning and 64.3MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-12 22:54:08,801 INFO L158 Benchmark]: Witness Printer took 5.16ms. Allocated memory is still 130.0MB. Free memory was 64.3MB in the beginning and 64.1MB in the end (delta: 205.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:54:08,805 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 130.0MB. Free memory was 103.0MB in the beginning and 103.0MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 315.04ms. Allocated memory is still 130.0MB. Free memory was 93.0MB in the beginning and 104.1MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.26ms. Allocated memory is still 130.0MB. Free memory was 103.9MB in the beginning and 102.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.96ms. Allocated memory is still 130.0MB. Free memory was 102.0MB in the beginning and 101.2MB in the end (delta: 777.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 372.33ms. Allocated memory is still 130.0MB. Free memory was 101.2MB in the beginning and 89.4MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 713.24ms. Allocated memory is still 130.0MB. Free memory was 89.4MB in the beginning and 64.3MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 5.16ms. Allocated memory is still 130.0MB. Free memory was 64.3MB in the beginning and 64.1MB in the end (delta: 205.9kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 49, overapproximation of someBinaryArithmeticFLOAToperation at line 32. Possible FailurePath: [L14] float pi = 3.14159 ; [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L22] CALL assume_abort_if_not(x > 0 && x < octant) [L10] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x > 0 && x < octant) [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [count=2, evenExp=1, multFactor=0, oddExp=49, pi=314159/100000, term=49, x=49] [L30] COND TRUE 1 [L32] term = term * (x/count) [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [count=4, multFactor=-1, pi=314159/100000, temp=0, x=49] [L49] CALL __VERIFIER_assert( oddExp >= evenExp ) [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, pi=314159/100000] [L12] reach_error() VAL [\old(cond)=0, cond=0, pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 17.79ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 14.90ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3 IncrementalHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 6 mSDtfsCounter, 3 mSolverCounterSat, 0.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2021-11-12 22:54:08,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF --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 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:54:11,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:54:11,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:54:11,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:54:11,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:54:11,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:54:11,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:54:11,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:54:11,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:54:11,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:54:11,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:54:11,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:54:11,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:54:11,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:54:11,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:54:11,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:54:11,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:54:11,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:54:11,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:54:11,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:54:11,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:54:11,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:54:11,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:54:11,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:54:11,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:54:11,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:54:11,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:54:11,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:54:11,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:54:11,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:54:11,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:54:11,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:54:11,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:54:11,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:54:11,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:54:11,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:54:11,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:54:11,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:54:11,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:54:11,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:54:11,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:54:11,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:54:11,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:54:11,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:54:11,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:54:11,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:54:11,590 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:54:11,590 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:54:11,590 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:54:11,590 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:54:11,590 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:54:11,591 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:54:11,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:54:11,593 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:54:11,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:54:11,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:54:11,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:54:11,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:54:11,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:54:11,595 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:54:11,595 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:54:11,595 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:54:11,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:54:11,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:54:11,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:54:11,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:54:11,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:54:11,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:54:11,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:54:11,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:54:11,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:54:11,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:54:11,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:54:11,598 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:54:11,598 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:11,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:54:11,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:54:11,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:54:11,599 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_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 [2021-11-12 22:54:12,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:54:12,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:54:12,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:54:12,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:54:12,040 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:54:12,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-11-12 22:54:12,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data/08edcc022/a113af5a1ed240a0b36c6e5e0dee0e0b/FLAGdfb1847e9 [2021-11-12 22:54:12,546 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:54:12,547 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-11-12 22:54:12,553 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data/08edcc022/a113af5a1ed240a0b36c6e5e0dee0e0b/FLAGdfb1847e9 [2021-11-12 22:54:12,939 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/data/08edcc022/a113af5a1ed240a0b36c6e5e0dee0e0b [2021-11-12 22:54:12,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:54:12,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:54:12,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:12,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:54:12,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:54:12,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:12" (1/1) ... [2021-11-12 22:54:12,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54307760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:12, skipping insertion in model container [2021-11-12 22:54:12,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:12" (1/1) ... [2021-11-12 22:54:12,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:54:12,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:54:13,128 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-11-12 22:54:13,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:13,163 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:54:13,180 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-11-12 22:54:13,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:13,201 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:54:13,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13 WrapperNode [2021-11-12 22:54:13,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:13,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:54:13,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:54:13,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:54:13,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:54:13,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:54:13,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:54:13,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:54:13,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:54:13,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:54:13,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:54:13,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:54:13,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (1/1) ... [2021-11-12 22:54:13,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:54:13,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:13,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:54:13,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:54:13,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:54:13,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:54:13,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:54:13,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:54:19,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:54:19,057 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:54:19,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:19 BoogieIcfgContainer [2021-11-12 22:54:19,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:54:19,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:54:19,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:54:19,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:54:19,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:54:12" (1/3) ... [2021-11-12 22:54:19,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a36e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:54:19, skipping insertion in model container [2021-11-12 22:54:19,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:13" (2/3) ... [2021-11-12 22:54:19,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a36e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:54:19, skipping insertion in model container [2021-11-12 22:54:19,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:19" (3/3) ... [2021-11-12 22:54:19,087 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-11-12 22:54:19,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:54:19,094 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:54:19,141 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:54:19,149 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:54:19,150 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:54:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:54:19,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:19,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:19,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:19,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:19,192 INFO L85 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2021-11-12 22:54:19,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:19,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867476489] [2021-11-12 22:54:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:19,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:19,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:19,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:19,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:54:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:19,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:54:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:19,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:19,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:19,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867476489] [2021-11-12 22:54:19,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867476489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:19,481 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:19,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:54:19,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359180836] [2021-11-12 22:54:19,484 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:19,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:54:19,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:54:19,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:54:19,527 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:19,545 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-12 22:54:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:54:19,550 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 22:54:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:19,559 INFO L225 Difference]: With dead ends: 29 [2021-11-12 22:54:19,560 INFO L226 Difference]: Without dead ends: 12 [2021-11-12 22:54:19,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:54:19,570 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:19,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:54:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-12 22:54:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-12 22:54:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-12 22:54:19,615 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-12 22:54:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:19,616 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-12 22:54:19,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-12 22:54:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 22:54:19,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:19,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:19,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:19,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:19,832 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:19,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2021-11-12 22:54:19,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:19,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746042265] [2021-11-12 22:54:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:19,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:19,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:19,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:19,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:54:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:20,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:20,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:20,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746042265] [2021-11-12 22:54:20,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746042265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:20,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:20,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:54:20,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46842881] [2021-11-12 22:54:20,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:20,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:20,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:20,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:20,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:20,769 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:23,453 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:25,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:25,795 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-11-12 22:54:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:25,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-12 22:54:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:25,797 INFO L225 Difference]: With dead ends: 24 [2021-11-12 22:54:25,797 INFO L226 Difference]: Without dead ends: 16 [2021-11-12 22:54:25,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:25,799 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4845.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5017.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:25,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 7 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 2 Unknown, 0 Unchecked, 5017.70ms Time] [2021-11-12 22:54:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-12 22:54:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-11-12 22:54:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-12 22:54:25,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-11-12 22:54:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:25,806 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-12 22:54:25,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-12 22:54:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 22:54:25,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:25,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:25,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:26,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:26,028 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2021-11-12 22:54:26,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:26,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317230079] [2021-11-12 22:54:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:26,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:26,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:26,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:26,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:54:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:54:26,889 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:54:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:54:27,756 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-12 22:54:27,756 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:54:27,757 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:54:27,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:27,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:27,963 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-12 22:54:27,966 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:54:28,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:54:28 BoogieIcfgContainer [2021-11-12 22:54:28,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:54:28,007 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:54:28,008 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:54:28,008 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:54:28,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:19" (3/4) ... [2021-11-12 22:54:28,010 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-12 22:54:28,078 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 22:54:28,083 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:54:28,084 INFO L158 Benchmark]: Toolchain (without parser) took 15141.77ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 34.9MB in the beginning and 31.3MB in the end (delta: 3.6MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2021-11-12 22:54:28,087 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 56.6MB. Free memory is still 37.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:54:28,088 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.05ms. Allocated memory is still 56.6MB. Free memory was 34.6MB in the beginning and 39.5MB in the end (delta: -4.9MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2021-11-12 22:54:28,088 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.28ms. Allocated memory is still 56.6MB. Free memory was 39.3MB in the beginning and 37.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:54:28,090 INFO L158 Benchmark]: Boogie Preprocessor took 37.39ms. Allocated memory is still 56.6MB. Free memory was 37.7MB in the beginning and 36.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:54:28,091 INFO L158 Benchmark]: RCFGBuilder took 5792.53ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 36.4MB in the beginning and 51.9MB in the end (delta: -15.5MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2021-11-12 22:54:28,091 INFO L158 Benchmark]: TraceAbstraction took 8933.12ms. Allocated memory is still 69.2MB. Free memory was 51.3MB in the beginning and 34.0MB in the end (delta: 17.3MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2021-11-12 22:54:28,092 INFO L158 Benchmark]: Witness Printer took 76.16ms. Allocated memory is still 69.2MB. Free memory was 34.0MB in the beginning and 31.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:54:28,095 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 56.6MB. Free memory is still 37.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 258.05ms. Allocated memory is still 56.6MB. Free memory was 34.6MB in the beginning and 39.5MB in the end (delta: -4.9MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.28ms. Allocated memory is still 56.6MB. Free memory was 39.3MB in the beginning and 37.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.39ms. Allocated memory is still 56.6MB. Free memory was 37.7MB in the beginning and 36.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 5792.53ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 36.4MB in the beginning and 51.9MB in the end (delta: -15.5MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. * TraceAbstraction took 8933.12ms. Allocated memory is still 69.2MB. Free memory was 51.3MB in the beginning and 34.0MB in the end (delta: 17.3MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. * Witness Printer took 76.16ms. Allocated memory is still 69.2MB. Free memory was 34.0MB in the beginning and 31.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] float pi = 3.14159 ; VAL [pi=3.141590118408203] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L22] CALL assume_abort_if_not(x > 0 && x < octant) [L10] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, pi=3.141590118408203] [L22] RET assume_abort_if_not(x > 0 && x < octant) [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [count=2, evenExp=1.0, multFactor=0, octant=1.0471967458724976, oddExp=0.00000000000000000010842021724855044, pi=3.141590118408203, term=0.00000000000000000010842021724855044, x=0.00000000000000000010842021724855044] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [count=2, evenExp=1.0, multFactor=0, octant=1.0471967458724976, oddExp=0.00000000000000000010842021724855044, pi=3.141590118408203, term=0.0000000000000000000000000000000000000058774717541114375, x=0.00000000000000000010842021724855044] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [(count>>1 % 2 == 0) ? 1 : -1=-1, count=2, evenExp=1.0, multFactor=0, octant=1.0471967458724976, oddExp=0.00000000000000000010842021724855044, pi=3.141590118408203, term=0.0000000000000000000000000000000000000058774717541114375, x=0.00000000000000000010842021724855044] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [count=4, evenExp=1.0, multFactor=4294967295, octant=1.0471967458724976, oddExp=0.00000000000000000010842021724855044, pi=3.141590118408203, temp=0, term=0.0, x=0.00000000000000000010842021724855044] [L49] CALL __VERIFIER_assert( oddExp >= evenExp ) [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, pi=3.141590118408203] [L12] reach_error() VAL [\old(cond)=0, cond=0, pi=3.141590118408203] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 5017.70ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 4845.51ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4 IncrementalHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 27 mSDtfsCounter, 4 mSolverCounterSat, 1.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 6, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 1 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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! [2021-11-12 22:54:28,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ca79bd-a513-4af2-9ad6-33107f43c6c0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE