./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH --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 7bc0bc6b799aa7c2e8f1e75841503c51df7a5f71041af511ebf2c664dce7cd54 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:32:47,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:32:47,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:32:47,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:32:47,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:32:47,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:32:47,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:32:47,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:32:47,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:32:47,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:32:47,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:32:47,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:32:47,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:32:47,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:32:47,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:32:47,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:32:47,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:32:47,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:32:47,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:32:47,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:32:47,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:32:47,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:32:47,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:32:47,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:32:47,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:32:47,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:32:47,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:32:47,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:32:47,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:32:47,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:32:47,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:32:47,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:32:47,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:32:47,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:32:47,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:32:47,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:32:47,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:32:47,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:32:47,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:32:47,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:32:47,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:32:47,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:32:47,443 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:32:47,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:32:47,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:32:47,444 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:32:47,445 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:32:47,445 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:32:47,445 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:32:47,446 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:32:47,446 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:32:47,446 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:32:47,447 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:32:47,447 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:32:47,447 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:32:47,448 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:32:47,448 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:32:47,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:32:47,449 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:32:47,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:32:47,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:32:47,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:32:47,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:32:47,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:32:47,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:32:47,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:32:47,452 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:32:47,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:32:47,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:32:47,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:32:47,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:32:47,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:32:47,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:32:47,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:32:47,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:32:47,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:32:47,455 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:32:47,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:32:47,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:32:47,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:32:47,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:32:47,456 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_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bc0bc6b799aa7c2e8f1e75841503c51df7a5f71041af511ebf2c664dce7cd54 [2021-11-03 05:32:47,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:32:47,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:32:47,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:32:47,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:32:47,745 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:32:47,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/floats-cdfpl/square_4.i [2021-11-03 05:32:47,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data/d2cf19412/c334d8a1352a4a16954df9b00329e8ea/FLAG3995e035c [2021-11-03 05:32:48,246 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:32:48,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/sv-benchmarks/c/floats-cdfpl/square_4.i [2021-11-03 05:32:48,253 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data/d2cf19412/c334d8a1352a4a16954df9b00329e8ea/FLAG3995e035c [2021-11-03 05:32:48,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data/d2cf19412/c334d8a1352a4a16954df9b00329e8ea [2021-11-03 05:32:48,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:32:48,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:32:48,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:32:48,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:32:48,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:32:48,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:48,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30cbff09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48, skipping insertion in model container [2021-11-03 05:32:48,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:48,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:32:48,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:32:48,895 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_90c1810a-6cc3-4abd-beed-57298ce135eb/sv-benchmarks/c/floats-cdfpl/square_4.i[1131,1144] [2021-11-03 05:32:48,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:32:48,907 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:32:48,933 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_90c1810a-6cc3-4abd-beed-57298ce135eb/sv-benchmarks/c/floats-cdfpl/square_4.i[1131,1144] [2021-11-03 05:32:48,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:32:48,950 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:32:48,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48 WrapperNode [2021-11-03 05:32:48,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:32:48,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:32:48,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:32:48,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:32:48,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:48,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:48,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:32:48,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:32:48,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:32:48,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:32:48,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:48,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:49,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:49,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:49,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:49,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:49,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:49,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:32:49,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:32:49,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:32:49,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:32:49,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (1/1) ... [2021-11-03 05:32:49,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:32:49,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:32:49,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:32:49,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:32:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:32:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:32:49,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:32:49,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:32:49,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:32:49,367 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-03 05:32:49,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:32:49 BoogieIcfgContainer [2021-11-03 05:32:49,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:32:49,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:32:49,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:32:49,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:32:49,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:32:48" (1/3) ... [2021-11-03 05:32:49,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c31a669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:32:49, skipping insertion in model container [2021-11-03 05:32:49,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:48" (2/3) ... [2021-11-03 05:32:49,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c31a669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:32:49, skipping insertion in model container [2021-11-03 05:32:49,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:32:49" (3/3) ... [2021-11-03 05:32:49,378 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4.i [2021-11-03 05:32:49,383 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:32:49,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:32:49,430 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:32:49,437 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 [2021-11-03 05:32:49,437 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:32:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2021-11-03 05:32:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:32:49,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:49,456 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:32:49,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:32:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:49,463 INFO L85 PathProgramCache]: Analyzing trace with hash 56123, now seen corresponding path program 1 times [2021-11-03 05:32:49,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:32:49,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116201246] [2021-11-03 05:32:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:49,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:32:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:32:49,607 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 05:32:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:32:49,647 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 05:32:49,649 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 05:32:49,650 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:32:49,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:32:49,657 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-11-03 05:32:49,660 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:32:49,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:32:49 BoogieIcfgContainer [2021-11-03 05:32:49,675 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:32:49,676 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:32:49,677 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:32:49,677 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:32:49,677 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:32:49" (3/4) ... [2021-11-03 05:32:49,680 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 05:32:49,681 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:32:49,683 INFO L168 Benchmark]: Toolchain (without parser) took 1025.75 ms. Allocated memory is still 121.6 MB. Free memory was 87.9 MB in the beginning and 68.8 MB in the end (delta: 19.1 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2021-11-03 05:32:49,683 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory is still 38.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:32:49,684 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.59 ms. Allocated memory is still 121.6 MB. Free memory was 87.7 MB in the beginning and 96.1 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:32:49,685 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.65 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 94.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:32:49,686 INFO L168 Benchmark]: Boogie Preprocessor took 42.35 ms. Allocated memory is still 121.6 MB. Free memory was 94.6 MB in the beginning and 93.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:32:49,687 INFO L168 Benchmark]: RCFGBuilder took 337.60 ms. Allocated memory is still 121.6 MB. Free memory was 93.5 MB in the beginning and 82.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:32:49,688 INFO L168 Benchmark]: TraceAbstraction took 304.17 ms. Allocated memory is still 121.6 MB. Free memory was 82.0 MB in the beginning and 69.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:32:49,688 INFO L168 Benchmark]: Witness Printer took 4.27 ms. Allocated memory is still 121.6 MB. Free memory was 69.0 MB in the beginning and 68.8 MB in the end (delta: 205.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:32:49,692 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory is still 38.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 283.59 ms. Allocated memory is still 121.6 MB. Free memory was 87.7 MB in the beginning and 96.1 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.65 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 94.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.35 ms. Allocated memory is still 121.6 MB. Free memory was 94.6 MB in the beginning and 93.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 337.60 ms. Allocated memory is still 121.6 MB. Free memory was 93.5 MB in the beginning and 82.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 304.17 ms. Allocated memory is still 121.6 MB. Free memory was 82.0 MB in the beginning and 69.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.27 ms. Allocated memory is still 121.6 MB. Free memory was 69.0 MB in the beginning and 68.8 MB in the end (delta: 205.9 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: 29]: 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 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.39844f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, 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=6occurred 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, 3 NumberOfCodeBlocks, 3 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 [2021-11-03 05:32:49,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/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_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH --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 7bc0bc6b799aa7c2e8f1e75841503c51df7a5f71041af511ebf2c664dce7cd54 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:32:52,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:32:52,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:32:52,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:32:52,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:32:52,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:32:52,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:32:52,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:32:52,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:32:52,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:32:52,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:32:52,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:32:52,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:32:52,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:32:52,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:32:52,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:32:52,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:32:52,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:32:52,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:32:52,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:32:52,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:32:52,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:32:52,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:32:52,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:32:52,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:32:52,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:32:52,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:32:52,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:32:52,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:32:52,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:32:52,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:32:52,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:32:52,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:32:52,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:32:52,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:32:52,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:32:52,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:32:52,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:32:52,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:32:52,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:32:52,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:32:52,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:32:52,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:32:52,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:32:52,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:32:52,326 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:32:52,326 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:32:52,327 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:32:52,327 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:32:52,327 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:32:52,327 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:32:52,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:32:52,329 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:32:52,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:32:52,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:32:52,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:32:52,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:32:52,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:32:52,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:32:52,330 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:32:52,331 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:32:52,331 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:32:52,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:32:52,332 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:32:52,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:32:52,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:32:52,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:32:52,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:32:52,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:32:52,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:32:52,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:32:52,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:32:52,334 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:32:52,334 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:32:52,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:32:52,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:32:52,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:32:52,335 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_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bc0bc6b799aa7c2e8f1e75841503c51df7a5f71041af511ebf2c664dce7cd54 [2021-11-03 05:32:52,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:32:52,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:32:52,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:32:52,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:32:52,759 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:32:52,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/floats-cdfpl/square_4.i [2021-11-03 05:32:52,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data/1c11d2799/b288133b86984e2db13eea1abc457872/FLAG078adba43 [2021-11-03 05:32:53,309 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:32:53,310 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/sv-benchmarks/c/floats-cdfpl/square_4.i [2021-11-03 05:32:53,316 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data/1c11d2799/b288133b86984e2db13eea1abc457872/FLAG078adba43 [2021-11-03 05:32:53,688 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/data/1c11d2799/b288133b86984e2db13eea1abc457872 [2021-11-03 05:32:53,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:32:53,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:32:53,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:32:53,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:32:53,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:32:53,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:53,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a49fb02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53, skipping insertion in model container [2021-11-03 05:32:53,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:53,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:32:53,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:32:53,882 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_90c1810a-6cc3-4abd-beed-57298ce135eb/sv-benchmarks/c/floats-cdfpl/square_4.i[1131,1144] [2021-11-03 05:32:53,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:32:53,899 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:32:53,915 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_90c1810a-6cc3-4abd-beed-57298ce135eb/sv-benchmarks/c/floats-cdfpl/square_4.i[1131,1144] [2021-11-03 05:32:53,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:32:53,930 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:32:53,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53 WrapperNode [2021-11-03 05:32:53,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:32:53,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:32:53,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:32:53,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:32:53,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:53,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:54,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:32:54,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:32:54,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:32:54,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:32:54,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:54,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:54,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:54,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:54,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:54,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:54,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:54,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:32:54,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:32:54,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:32:54,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:32:54,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (1/1) ... [2021-11-03 05:32:54,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:32:54,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:32:54,095 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:32:54,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:32:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:32:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:32:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:32:54,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:32:56,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:32:56,472 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-03 05:32:56,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:32:56 BoogieIcfgContainer [2021-11-03 05:32:56,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:32:56,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:32:56,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:32:56,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:32:56,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:32:53" (1/3) ... [2021-11-03 05:32:56,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad8d0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:32:56, skipping insertion in model container [2021-11-03 05:32:56,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:53" (2/3) ... [2021-11-03 05:32:56,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad8d0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:32:56, skipping insertion in model container [2021-11-03 05:32:56,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:32:56" (3/3) ... [2021-11-03 05:32:56,483 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4.i [2021-11-03 05:32:56,489 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:32:56,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:32:56,538 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:32:56,544 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 [2021-11-03 05:32:56,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:32:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-11-03 05:32:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:32:56,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:56,563 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:32:56,564 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:32:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-11-03 05:32:56,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:56,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392820185] [2021-11-03 05:32:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:56,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:56,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:56,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:56,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:32:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:32:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:57,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:57,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:57,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392820185] [2021-11-03 05:32:57,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392820185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:57,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:57,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:32:57,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923903055] [2021-11-03 05:32:57,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:32:57,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:32:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:32:57,310 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-11-03 05:32:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:57,337 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-03 05:32:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:32:57,339 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 [2021-11-03 05:32:57,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:57,347 INFO L225 Difference]: With dead ends: 19 [2021-11-03 05:32:57,348 INFO L226 Difference]: Without dead ends: 7 [2021-11-03 05:32:57,350 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 [2021-11-03 05:32:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-03 05:32:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-03 05:32:57,376 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) [2021-11-03 05:32:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-11-03 05:32:57,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-11-03 05:32:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:57,378 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-11-03 05:32:57,379 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) [2021-11-03 05:32:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-11-03 05:32:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:32:57,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:57,381 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:32:57,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:32:57,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:57,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:32:57,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:57,604 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-11-03 05:32:57,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:57,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410832963] [2021-11-03 05:32:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:57,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:57,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:57,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:57,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c1810a-6cc3-4abd-beed-57298ce135eb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process