./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG --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 fa8669e514192921cf64fdf0639cd37a443816328604ea9b0272ab52a6769b9f .................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG --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 fa8669e514192921cf64fdf0639cd37a443816328604ea9b0272ab52a6769b9f ................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:36:18,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:36:18,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:36:19,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:36:19,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:36:19,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:36:19,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:36:19,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:36:19,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:36:19,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:36:19,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:36:19,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:36:19,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:36:19,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:36:19,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:36:19,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:36:19,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:36:19,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:36:19,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:36:19,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:36:19,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:36:19,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:36:19,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:36:19,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:36:19,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:36:19,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:36:19,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:36:19,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:36:19,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:36:19,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:36:19,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:36:19,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:36:19,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:36:19,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:36:19,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:36:19,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:36:19,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:36:19,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:36:19,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:36:19,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:36:19,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:36:19,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:36:19,131 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:36:19,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:36:19,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:36:19,133 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:36:19,133 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:36:19,133 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:36:19,134 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:36:19,134 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:36:19,134 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:36:19,134 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:36:19,135 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:36:19,135 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:36:19,135 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:36:19,135 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:36:19,136 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:36:19,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:36:19,137 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:36:19,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:36:19,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:36:19,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:36:19,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:36:19,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:36:19,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:36:19,138 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:36:19,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:36:19,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:36:19,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:36:19,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:36:19,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:36:19,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:36:19,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:36:19,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:36:19,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:36:19,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:36:19,141 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:36:19,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:36:19,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:36:19,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:36:19,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:36:19,154 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_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa8669e514192921cf64fdf0639cd37a443816328604ea9b0272ab52a6769b9f [2021-10-29 05:36:19,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:36:19,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:36:19,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:36:19,485 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:36:19,486 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:36:19,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-29 05:36:19,570 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data/b4d5d46e1/9a00f9e797624823a0932410f2641718/FLAGc5e804be0 [2021-10-29 05:36:20,007 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:36:20,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-29 05:36:20,014 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data/b4d5d46e1/9a00f9e797624823a0932410f2641718/FLAGc5e804be0 [2021-10-29 05:36:20,401 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data/b4d5d46e1/9a00f9e797624823a0932410f2641718 [2021-10-29 05:36:20,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:36:20,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:36:20,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:36:20,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:36:20,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:36:20,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@583d4ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20, skipping insertion in model container [2021-10-29 05:36:20,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:36:20,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:36:20,618 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_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-29 05:36:20,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:36:20,648 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:36:20,664 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_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-29 05:36:20,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:36:20,685 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:36:20,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20 WrapperNode [2021-10-29 05:36:20,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:36:20,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:36:20,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:36:20,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:36:20,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:36:20,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:36:20,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:36:20,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:36:20,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:36:20,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:36:20,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:36:20,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:36:20,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (1/1) ... [2021-10-29 05:36:20,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:36:20,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:36:20,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:36:20,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:36:20,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:36:20,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:36:20,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:36:20,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:36:21,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:36:21,136 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-29 05:36:21,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:36:21 BoogieIcfgContainer [2021-10-29 05:36:21,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:36:21,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:36:21,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:36:21,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:36:21,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:36:20" (1/3) ... [2021-10-29 05:36:21,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae43f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:36:21, skipping insertion in model container [2021-10-29 05:36:21,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:20" (2/3) ... [2021-10-29 05:36:21,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae43f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:36:21, skipping insertion in model container [2021-10-29 05:36:21,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:36:21" (3/3) ... [2021-10-29 05:36:21,148 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-29 05:36:21,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:36:21,154 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:36:21,207 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:36:21,213 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 [2021-10-29 05:36:21,213 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:36:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 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) [2021-10-29 05:36:21,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-29 05:36:21,230 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:21,231 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-29 05:36:21,232 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:36:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1947436, now seen corresponding path program 1 times [2021-10-29 05:36:21,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:36:21,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716803144] [2021-10-29 05:36:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:21,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:36:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:36:21,349 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:36:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:36:21,389 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:36:21,391 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:36:21,393 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:21,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:36:21,398 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-10-29 05:36:21,401 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:36:21,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:36:21 BoogieIcfgContainer [2021-10-29 05:36:21,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:36:21,419 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:36:21,419 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:36:21,419 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:36:21,420 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:36:21" (3/4) ... [2021-10-29 05:36:21,423 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:36:21,423 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:36:21,425 INFO L168 Benchmark]: Toolchain (without parser) took 1018.39 ms. Allocated memory is still 102.8 MB. Free memory was 61.7 MB in the beginning and 60.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:21,425 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory is still 77.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:21,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.76 ms. Allocated memory is still 102.8 MB. Free memory was 61.5 MB in the beginning and 52.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:21,427 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.49 ms. Allocated memory is still 102.8 MB. Free memory was 51.9 MB in the beginning and 50.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:21,427 INFO L168 Benchmark]: Boogie Preprocessor took 36.79 ms. Allocated memory is still 102.8 MB. Free memory was 50.5 MB in the beginning and 49.5 MB in the end (delta: 933.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:21,428 INFO L168 Benchmark]: RCFGBuilder took 368.48 ms. Allocated memory is still 102.8 MB. Free memory was 49.5 MB in the beginning and 75.0 MB in the end (delta: -25.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:21,429 INFO L168 Benchmark]: TraceAbstraction took 277.07 ms. Allocated memory is still 102.8 MB. Free memory was 74.4 MB in the beginning and 60.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:21,429 INFO L168 Benchmark]: Witness Printer took 4.17 ms. Allocated memory is still 102.8 MB. Free memory was 60.7 MB in the beginning and 60.4 MB in the end (delta: 285.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:21,437 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory is still 77.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.76 ms. Allocated memory is still 102.8 MB. Free memory was 61.5 MB in the beginning and 52.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.49 ms. Allocated memory is still 102.8 MB. Free memory was 51.9 MB in the beginning and 50.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.79 ms. Allocated memory is still 102.8 MB. Free memory was 50.5 MB in the beginning and 49.5 MB in the end (delta: 933.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 368.48 ms. Allocated memory is still 102.8 MB. Free memory was 49.5 MB in the beginning and 75.0 MB in the end (delta: -25.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 277.07 ms. Allocated memory is still 102.8 MB. Free memory was 74.4 MB in the beginning and 60.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.17 ms. Allocated memory is still 102.8 MB. Free memory was 60.7 MB in the beginning and 60.4 MB in the end (delta: 285.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * 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: 13]: 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 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-29 05:36:21,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:36:23,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:36:24,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:36:24,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:36:24,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:36:24,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:36:24,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:36:24,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:36:24,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:36:24,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:36:24,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:36:24,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:36:24,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:36:24,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:36:24,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:36:24,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:36:24,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:36:24,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:36:24,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:36:24,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:36:24,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:36:24,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:36:24,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:36:24,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:36:24,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:36:24,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:36:24,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:36:24,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:36:24,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:36:24,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:36:24,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:36:24,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:36:24,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:36:24,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:36:24,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:36:24,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:36:24,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:36:24,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:36:24,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:36:24,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:36:24,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:36:24,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-29 05:36:24,161 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:36:24,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:36:24,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:36:24,163 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:36:24,163 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:36:24,163 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:36:24,164 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:36:24,164 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:36:24,164 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:36:24,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:36:24,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:36:24,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:36:24,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:36:24,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:36:24,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:36:24,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:36:24,166 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:36:24,170 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:36:24,170 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:36:24,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:36:24,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:36:24,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:36:24,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:36:24,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:36:24,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:36:24,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:36:24,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:36:24,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:36:24,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:36:24,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:36:24,174 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:36:24,175 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:36:24,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:36:24,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:36:24,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:36:24,176 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_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa8669e514192921cf64fdf0639cd37a443816328604ea9b0272ab52a6769b9f [2021-10-29 05:36:24,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:36:24,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:36:24,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:36:24,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:36:24,614 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:36:24,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-29 05:36:24,694 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data/79acb02e2/fcc05ff9b7e449b0b2b8cebaefef1fab/FLAG5239cdb1f [2021-10-29 05:36:25,317 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:36:25,318 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-29 05:36:25,327 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data/79acb02e2/fcc05ff9b7e449b0b2b8cebaefef1fab/FLAG5239cdb1f [2021-10-29 05:36:25,349 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/data/79acb02e2/fcc05ff9b7e449b0b2b8cebaefef1fab [2021-10-29 05:36:25,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:36:25,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:36:25,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:36:25,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:36:25,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:36:25,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7b66a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25, skipping insertion in model container [2021-10-29 05:36:25,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:36:25,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:36:25,555 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_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-29 05:36:25,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:36:25,579 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:36:25,593 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_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-29 05:36:25,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:36:25,621 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:36:25,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25 WrapperNode [2021-10-29 05:36:25,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:36:25,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:36:25,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:36:25,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:36:25,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:36:25,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:36:25,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:36:25,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:36:25,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:36:25,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:36:25,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:36:25,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:36:25,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (1/1) ... [2021-10-29 05:36:25,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:36:25,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:36:25,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:36:25,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:36:25,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:36:25,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:36:25,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:36:25,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:36:26,763 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:36:26,764 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-29 05:36:26,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:36:26 BoogieIcfgContainer [2021-10-29 05:36:26,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:36:26,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:36:26,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:36:26,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:36:26,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:36:25" (1/3) ... [2021-10-29 05:36:26,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f3ce00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:36:26, skipping insertion in model container [2021-10-29 05:36:26,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:25" (2/3) ... [2021-10-29 05:36:26,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f3ce00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:36:26, skipping insertion in model container [2021-10-29 05:36:26,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:36:26" (3/3) ... [2021-10-29 05:36:26,774 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-29 05:36:26,779 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:36:26,779 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:36:26,824 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:36:26,831 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 [2021-10-29 05:36:26,832 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:36:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) [2021-10-29 05:36:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:36:26,850 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:26,850 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:36:26,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:36:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-10-29 05:36:26,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:36:26,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709935564] [2021-10-29 05:36:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:26,893 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:36:26,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:36:26,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:36:26,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:36:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:36:27,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-29 05:36:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:36:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:36:27,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:36:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:36:27,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:36:27,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709935564] [2021-10-29 05:36:27,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709935564] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:36:27,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:36:27,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:36:27,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627646528] [2021-10-29 05:36:27,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:36:27,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:36:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:36:27,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:36:27,250 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-29 05:36:27,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:36:27,264 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-29 05:36:27,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:36:27,265 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-10-29 05:36:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:36:27,275 INFO L225 Difference]: With dead ends: 21 [2021-10-29 05:36:27,275 INFO L226 Difference]: Without dead ends: 7 [2021-10-29 05:36:27,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:36:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-29 05:36:27,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-29 05:36:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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) [2021-10-29 05:36:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-29 05:36:27,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-29 05:36:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:36:27,309 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-29 05:36:27,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-29 05:36:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-29 05:36:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:36:27,312 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:27,312 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:36:27,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-29 05:36:27,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:36:27,526 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:36:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-10-29 05:36:27,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:36:27,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929679709] [2021-10-29 05:36:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:27,529 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:36:27,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:36:27,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:36:27,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:36:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:36:27,653 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:36:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:36:27,771 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 05:36:27,771 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:36:27,773 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:27,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:36:27,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:36:27,978 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-29 05:36:27,980 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:36:28,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:36:28 BoogieIcfgContainer [2021-10-29 05:36:28,011 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:36:28,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:36:28,012 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:36:28,012 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:36:28,012 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:36:26" (3/4) ... [2021-10-29 05:36:28,020 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:36:28,068 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:36:28,068 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:36:28,073 INFO L168 Benchmark]: Toolchain (without parser) took 2715.41 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 38.6 MB in the beginning and 47.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:28,077 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 60.8 MB. Free memory is still 41.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:28,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.30 ms. Allocated memory is still 60.8 MB. Free memory was 38.5 MB in the beginning and 44.2 MB in the end (delta: -5.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:28,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.50 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 42.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:28,079 INFO L168 Benchmark]: Boogie Preprocessor took 48.14 ms. Allocated memory is still 60.8 MB. Free memory was 42.6 MB in the beginning and 41.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:28,080 INFO L168 Benchmark]: RCFGBuilder took 1044.71 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 32.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:28,080 INFO L168 Benchmark]: TraceAbstraction took 1243.21 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 31.7 MB in the beginning and 49.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:28,081 INFO L168 Benchmark]: Witness Printer took 57.03 ms. Allocated memory is still 83.9 MB. Free memory was 49.3 MB in the beginning and 47.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:28,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 60.8 MB. Free memory is still 41.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 265.30 ms. Allocated memory is still 60.8 MB. Free memory was 38.5 MB in the beginning and 44.2 MB in the end (delta: -5.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.50 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 42.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.14 ms. Allocated memory is still 60.8 MB. Free memory was 42.6 MB in the beginning and 41.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1044.71 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 32.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1243.21 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 31.7 MB in the beginning and 49.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Witness Printer took 57.03 ms. Allocated memory is still 83.9 MB. Free memory was 49.3 MB in the beginning and 47.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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! [2021-10-29 05:36:28,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a0bcde1-defe-4a4e-9fdf-c6a127ec70bd/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...