./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02e16371708027ec56fdf0402c3e1a5d4f23a0ff .......................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02e16371708027ec56fdf0402c3e1a5d4f23a0ff ................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 03:11:59,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 03:11:59,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 03:11:59,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 03:11:59,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 03:11:59,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 03:11:59,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 03:11:59,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 03:11:59,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 03:11:59,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 03:11:59,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 03:11:59,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 03:11:59,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 03:11:59,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 03:11:59,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 03:11:59,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 03:11:59,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 03:11:59,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 03:11:59,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 03:11:59,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 03:11:59,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 03:11:59,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 03:11:59,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 03:11:59,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 03:11:59,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 03:11:59,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 03:11:59,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 03:11:59,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 03:11:59,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 03:11:59,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 03:11:59,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 03:11:59,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 03:11:59,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 03:11:59,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 03:11:59,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 03:11:59,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 03:11:59,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 03:11:59,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 03:11:59,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 03:11:59,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 03:11:59,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 03:11:59,445 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 03:11:59,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 03:11:59,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 03:11:59,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 03:11:59,474 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 03:11:59,474 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 03:11:59,474 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 03:11:59,474 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 03:11:59,475 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 03:11:59,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 03:11:59,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 03:11:59,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 03:11:59,476 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 03:11:59,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 03:11:59,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 03:11:59,476 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 03:11:59,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 03:11:59,478 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 03:11:59,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 03:11:59,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 03:11:59,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 03:11:59,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 03:11:59,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 03:11:59,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 03:11:59,479 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 03:11:59,480 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 03:11:59,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 03:11:59,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 03:11:59,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 03:11:59,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 03:11:59,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 03:11:59,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 03:11:59,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:11:59,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 03:11:59,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 03:11:59,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 03:11:59,482 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 03:11:59,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 03:11:59,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 03:11:59,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 03:11:59,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 03:11:59,484 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-11-30 03:11:59,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 03:11:59,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 03:11:59,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 03:11:59,803 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 03:11:59,803 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 03:11:59,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-30 03:11:59,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data/a659083b5/a2de494cb241416a97dd929d8ecb85ad/FLAGc7c898fa0 [2020-11-30 03:12:00,365 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 03:12:00,366 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-30 03:12:00,372 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data/a659083b5/a2de494cb241416a97dd929d8ecb85ad/FLAGc7c898fa0 [2020-11-30 03:12:00,732 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data/a659083b5/a2de494cb241416a97dd929d8ecb85ad [2020-11-30 03:12:00,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 03:12:00,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 03:12:00,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 03:12:00,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 03:12:00,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 03:12:00,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:12:00" (1/1) ... [2020-11-30 03:12:00,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599e1e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:00, skipping insertion in model container [2020-11-30 03:12:00,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:12:00" (1/1) ... [2020-11-30 03:12:00,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 03:12:00,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 03:12:00,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:12:00,984 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 03:12:01,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:12:01,017 INFO L208 MainTranslator]: Completed translation [2020-11-30 03:12:01,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01 WrapperNode [2020-11-30 03:12:01,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 03:12:01,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 03:12:01,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 03:12:01,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 03:12:01,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... [2020-11-30 03:12:01,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... [2020-11-30 03:12:01,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 03:12:01,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 03:12:01,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 03:12:01,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 03:12:01,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... [2020-11-30 03:12:01,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... [2020-11-30 03:12:01,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... [2020-11-30 03:12:01,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... [2020-11-30 03:12:01,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... [2020-11-30 03:12:01,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... [2020-11-30 03:12:01,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... [2020-11-30 03:12:01,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 03:12:01,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 03:12:01,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 03:12:01,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 03:12:01,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:12:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 03:12:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 03:12:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 03:12:01,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 03:12:01,566 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 03:12:01,567 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-30 03:12:01,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:12:01 BoogieIcfgContainer [2020-11-30 03:12:01,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 03:12:01,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 03:12:01,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 03:12:01,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 03:12:01,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 03:12:00" (1/3) ... [2020-11-30 03:12:01,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f424d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:12:01, skipping insertion in model container [2020-11-30 03:12:01,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:01" (2/3) ... [2020-11-30 03:12:01,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f424d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:12:01, skipping insertion in model container [2020-11-30 03:12:01,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:12:01" (3/3) ... [2020-11-30 03:12:01,584 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-11-30 03:12:01,596 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 03:12:01,601 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 03:12:01,613 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 03:12:01,638 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 03:12:01,638 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 03:12:01,638 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 03:12:01,638 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 03:12:01,639 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 03:12:01,639 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 03:12:01,639 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 03:12:01,639 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 03:12:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-11-30 03:12:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 03:12:01,656 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:12:01,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 03:12:01,657 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:12:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:12:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash 82167647, now seen corresponding path program 1 times [2020-11-30 03:12:01,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:12:01,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146415536] [2020-11-30 03:12:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:12:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:12:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:12:01,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146415536] [2020-11-30 03:12:01,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:12:01,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 03:12:01,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405774094] [2020-11-30 03:12:01,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 03:12:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:12:01,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 03:12:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 03:12:01,867 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2020-11-30 03:12:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:12:01,881 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-11-30 03:12:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 03:12:01,883 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-30 03:12:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:12:01,891 INFO L225 Difference]: With dead ends: 15 [2020-11-30 03:12:01,891 INFO L226 Difference]: Without dead ends: 7 [2020-11-30 03:12:01,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 03:12:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-30 03:12:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-30 03:12:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 03:12:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-30 03:12:01,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-11-30 03:12:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:12:01,936 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-30 03:12:01,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 03:12:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-30 03:12:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 03:12:01,936 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:12:01,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 03:12:01,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 03:12:01,937 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:12:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:12:01,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1748875412, now seen corresponding path program 1 times [2020-11-30 03:12:01,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:12:01,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943047021] [2020-11-30 03:12:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:12:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 03:12:02,004 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 03:12:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 03:12:02,054 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 03:12:02,075 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 03:12:02,075 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 03:12:02,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 03:12:02,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 03:12:02 BoogieIcfgContainer [2020-11-30 03:12:02,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 03:12:02,103 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 03:12:02,103 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 03:12:02,103 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 03:12:02,104 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:12:01" (3/4) ... [2020-11-30 03:12:02,107 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 03:12:02,107 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 03:12:02,109 INFO L168 Benchmark]: Toolchain (without parser) took 1369.63 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 60.7 MB in the beginning and 78.5 MB in the end (delta: -17.7 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:02,110 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory was 48.9 MB in the beginning and 48.9 MB in the end (delta: 34.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:12:02,111 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.09 ms. Allocated memory is still 90.2 MB. Free memory was 60.5 MB in the beginning and 67.9 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:02,112 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.81 ms. Allocated memory is still 90.2 MB. Free memory was 67.9 MB in the beginning and 66.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:02,112 INFO L168 Benchmark]: Boogie Preprocessor took 22.28 ms. Allocated memory is still 90.2 MB. Free memory was 66.2 MB in the beginning and 65.3 MB in the end (delta: 837.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:12:02,113 INFO L168 Benchmark]: RCFGBuilder took 494.27 ms. Allocated memory is still 90.2 MB. Free memory was 65.3 MB in the beginning and 45.6 MB in the end (delta: 19.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:02,114 INFO L168 Benchmark]: TraceAbstraction took 531.47 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 45.2 MB in the beginning and 79.0 MB in the end (delta: -33.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:12:02,115 INFO L168 Benchmark]: Witness Printer took 4.21 ms. Allocated memory is still 109.1 MB. Free memory was 79.0 MB in the beginning and 78.5 MB in the end (delta: 537.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:12:02,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory was 48.9 MB in the beginning and 48.9 MB in the end (delta: 34.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.09 ms. Allocated memory is still 90.2 MB. Free memory was 60.5 MB in the beginning and 67.9 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.81 ms. Allocated memory is still 90.2 MB. Free memory was 67.9 MB in the beginning and 66.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.28 ms. Allocated memory is still 90.2 MB. Free memory was 66.2 MB in the beginning and 65.3 MB in the end (delta: 837.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 494.27 ms. Allocated memory is still 90.2 MB. Free memory was 65.3 MB in the beginning and 45.6 MB in the end (delta: 19.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 531.47 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 45.2 MB in the beginning and 79.0 MB in the end (delta: -33.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.21 ms. Allocated memory is still 109.1 MB. Free memory was 79.0 MB in the beginning and 78.5 MB in the end (delta: 537.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 49, overapproximation of someBinaryArithmeticFLOAToperation at line 32. Possible FailurePath: [L14] float pi = 3.14159 ; [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=314159/100000] [L30] COND TRUE 1 [L32] term = term * (x/count) [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=314159/100000] [L12] COND TRUE !(cond) VAL [pi=314159/100000] [L7] __assert_fail("0", "loop2-1.c", 7, "reach_error") VAL [pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 03:12:04,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 03:12:04,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 03:12:04,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 03:12:04,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 03:12:04,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 03:12:04,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 03:12:04,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 03:12:04,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 03:12:04,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 03:12:04,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 03:12:04,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 03:12:04,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 03:12:04,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 03:12:04,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 03:12:04,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 03:12:04,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 03:12:04,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 03:12:04,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 03:12:04,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 03:12:04,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 03:12:04,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 03:12:04,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 03:12:04,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 03:12:04,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 03:12:04,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 03:12:04,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 03:12:04,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 03:12:04,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 03:12:04,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 03:12:04,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 03:12:04,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 03:12:04,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 03:12:04,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 03:12:04,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 03:12:04,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 03:12:04,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 03:12:04,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 03:12:04,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 03:12:04,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 03:12:04,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 03:12:04,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-30 03:12:04,778 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 03:12:04,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 03:12:04,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 03:12:04,782 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 03:12:04,782 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 03:12:04,782 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 03:12:04,783 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 03:12:04,783 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 03:12:04,783 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 03:12:04,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 03:12:04,786 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 03:12:04,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 03:12:04,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 03:12:04,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 03:12:04,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 03:12:04,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 03:12:04,787 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 03:12:04,787 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 03:12:04,788 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 03:12:04,788 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 03:12:04,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 03:12:04,788 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 03:12:04,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 03:12:04,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 03:12:04,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 03:12:04,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 03:12:04,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 03:12:04,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:12:04,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 03:12:04,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 03:12:04,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 03:12:04,791 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 03:12:04,791 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 03:12:04,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 03:12:04,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 03:12:04,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 03:12:04,792 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-11-30 03:12:05,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 03:12:05,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 03:12:05,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 03:12:05,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 03:12:05,275 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 03:12:05,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-30 03:12:05,350 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data/2e84a7659/13389c97fa864c5ab30fa3bf9dab99ab/FLAG9ca0835d5 [2020-11-30 03:12:05,862 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 03:12:05,862 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-30 03:12:05,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data/2e84a7659/13389c97fa864c5ab30fa3bf9dab99ab/FLAG9ca0835d5 [2020-11-30 03:12:06,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/data/2e84a7659/13389c97fa864c5ab30fa3bf9dab99ab [2020-11-30 03:12:06,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 03:12:06,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 03:12:06,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 03:12:06,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 03:12:06,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 03:12:06,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@554f2922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06, skipping insertion in model container [2020-11-30 03:12:06,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 03:12:06,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 03:12:06,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:12:06,439 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 03:12:06,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:12:06,479 INFO L208 MainTranslator]: Completed translation [2020-11-30 03:12:06,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06 WrapperNode [2020-11-30 03:12:06,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 03:12:06,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 03:12:06,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 03:12:06,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 03:12:06,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 03:12:06,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 03:12:06,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 03:12:06,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 03:12:06,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... [2020-11-30 03:12:06,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 03:12:06,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 03:12:06,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 03:12:06,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 03:12:06,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:12:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 03:12:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 03:12:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 03:12:06,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 03:12:11,693 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 03:12:11,693 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-30 03:12:11,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:12:11 BoogieIcfgContainer [2020-11-30 03:12:11,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 03:12:11,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 03:12:11,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 03:12:11,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 03:12:11,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 03:12:06" (1/3) ... [2020-11-30 03:12:11,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c017e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:12:11, skipping insertion in model container [2020-11-30 03:12:11,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:12:06" (2/3) ... [2020-11-30 03:12:11,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c017e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:12:11, skipping insertion in model container [2020-11-30 03:12:11,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:12:11" (3/3) ... [2020-11-30 03:12:11,703 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-11-30 03:12:11,713 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 03:12:11,717 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 03:12:11,729 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 03:12:11,752 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 03:12:11,752 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 03:12:11,752 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 03:12:11,752 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 03:12:11,752 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 03:12:11,753 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 03:12:11,753 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 03:12:11,753 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 03:12:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-30 03:12:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 03:12:11,769 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:12:11,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:12:11,770 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:12:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:12:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-11-30 03:12:11,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 03:12:11,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354631314] [2020-11-30 03:12:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 03:12:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:12:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 03:12:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:12:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:12:12,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:12:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:12:12,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354631314] [2020-11-30 03:12:12,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:12:12,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 03:12:12,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782517613] [2020-11-30 03:12:12,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 03:12:12,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 03:12:12,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 03:12:12,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 03:12:12,026 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-11-30 03:12:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:12:12,040 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-11-30 03:12:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 03:12:12,041 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-30 03:12:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:12:12,049 INFO L225 Difference]: With dead ends: 30 [2020-11-30 03:12:12,049 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 03:12:12,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 03:12:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 03:12:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 03:12:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 03:12:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-30 03:12:12,083 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-11-30 03:12:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:12:12,083 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-30 03:12:12,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 03:12:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-30 03:12:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 03:12:12,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:12:12,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:12:12,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 03:12:12,310 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:12:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:12:12,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-11-30 03:12:12,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 03:12:12,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009713255] [2020-11-30 03:12:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 03:12:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:12:13,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 03:12:13,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:12:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:12:13,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:12:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:12:13,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009713255] [2020-11-30 03:12:13,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:12:13,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 03:12:13,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727774516] [2020-11-30 03:12:13,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 03:12:13,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 03:12:13,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 03:12:13,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:12:13,313 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-11-30 03:12:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:12:19,130 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-11-30 03:12:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 03:12:19,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-30 03:12:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:12:19,132 INFO L225 Difference]: With dead ends: 24 [2020-11-30 03:12:19,132 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 03:12:19,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:12:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 03:12:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-11-30 03:12:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 03:12:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-30 03:12:19,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-11-30 03:12:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:12:19,138 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-30 03:12:19,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 03:12:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-30 03:12:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 03:12:19,141 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:12:19,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:12:19,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 03:12:19,342 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:12:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:12:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-11-30 03:12:19,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 03:12:19,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393704581] [2020-11-30 03:12:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-30 03:12:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 03:12:20,381 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 03:12:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 03:12:21,418 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 03:12:21,544 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-30 03:12:21,544 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 03:12:21,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 03:12:21,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 03:12:21 BoogieIcfgContainer [2020-11-30 03:12:21,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 03:12:21,829 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 03:12:21,829 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 03:12:21,829 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 03:12:21,830 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:12:11" (3/4) ... [2020-11-30 03:12:21,834 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 03:12:21,907 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_89f69f34-5afe-4979-ba73-d4c2474cc00c/bin/utaipan/witness.graphml [2020-11-30 03:12:21,907 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 03:12:21,910 INFO L168 Benchmark]: Toolchain (without parser) took 15678.66 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 43.3 MB in the beginning and 38.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:21,910 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 43.5 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:12:21,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.23 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 32.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:21,912 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.58 ms. Allocated memory is still 62.9 MB. Free memory was 32.5 MB in the beginning and 46.2 MB in the end (delta: -13.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:21,912 INFO L168 Benchmark]: Boogie Preprocessor took 33.33 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 44.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:12:21,913 INFO L168 Benchmark]: RCFGBuilder took 5112.95 ms. Allocated memory is still 62.9 MB. Free memory was 44.7 MB in the beginning and 31.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:21,914 INFO L168 Benchmark]: TraceAbstraction took 10131.80 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 40.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:21,915 INFO L168 Benchmark]: Witness Printer took 78.77 ms. Allocated memory is still 75.5 MB. Free memory was 40.0 MB in the beginning and 38.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:12:21,918 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 43.5 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 247.23 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 32.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.58 ms. Allocated memory is still 62.9 MB. Free memory was 32.5 MB in the beginning and 46.2 MB in the end (delta: -13.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.33 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 44.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 5112.95 ms. Allocated memory is still 62.9 MB. Free memory was 44.7 MB in the beginning and 31.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10131.80 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 40.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * Witness Printer took 78.77 ms. Allocated memory is still 75.5 MB. Free memory was 40.0 MB in the beginning and 38.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] float pi = 3.14159 ; VAL [pi=3.141590118408203] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=3.141590118408203] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=3.141590118408203] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=3.141590118408203] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=3.141590118408203] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=3.141590118408203] [L12] COND TRUE !(cond) VAL [pi=3.141590118408203] [L7] __assert_fail("0", "loop2-1.c", 7, "reach_error") VAL [pi=3.141590118408203] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 2 SDslu, 7 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 438 SizeOfPredicates, 1 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...