./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1250.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_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/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 7498db39da300a600c956afc9ee769ef7c520660 ...................................................................................................................................................................................................................................................................................................... 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_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/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 7498db39da300a600c956afc9ee769ef7c520660 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:49:37,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:49:37,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:49:37,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:49:37,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:49:37,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:49:37,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:49:37,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:49:37,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:49:37,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:49:37,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:49:37,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:49:37,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:49:37,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:49:37,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:49:37,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:49:37,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:49:37,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:49:37,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:49:37,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:49:37,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:49:37,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:49:37,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:49:37,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:49:37,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:49:37,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:49:37,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:49:37,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:49:37,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:49:37,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:49:37,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:49:37,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:49:37,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:49:37,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:49:37,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:49:37,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:49:37,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:49:37,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:49:37,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:49:37,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:49:37,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:49:37,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:49:37,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:49:37,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:49:37,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:49:37,921 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:49:37,922 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:49:37,922 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:49:37,922 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:49:37,922 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:49:37,923 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:49:37,923 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:49:37,924 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:49:37,925 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:49:37,925 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:49:37,925 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:49:37,926 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:49:37,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:49:37,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:49:37,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:49:37,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:49:37,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:49:37,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:49:37,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:49:37,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:49:37,929 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:49:37,929 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:49:37,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:49:37,930 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:49:37,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:49:37,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:49:37,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:49:37,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:49:37,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:49:37,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:49:37,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:49:37,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:49:37,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:49:37,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:49:37,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:49:37,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:49:37,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:49:37,934 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_4c3a489c-aca8-4608-84e5-346dff78a765/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7498db39da300a600c956afc9ee769ef7c520660 [2020-11-22 12:49:38,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:49:38,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:49:38,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:49:38,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:49:38,278 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:49:38,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2020-11-22 12:49:38,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data/e5ec27a51/141d15fa35e242dca0adf3f83b162383/FLAGf3fd9fe2a [2020-11-22 12:49:38,884 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:49:38,885 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2020-11-22 12:49:38,893 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data/e5ec27a51/141d15fa35e242dca0adf3f83b162383/FLAGf3fd9fe2a [2020-11-22 12:49:39,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data/e5ec27a51/141d15fa35e242dca0adf3f83b162383 [2020-11-22 12:49:39,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:49:39,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:49:39,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:39,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:49:39,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:49:39,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3994a893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39, skipping insertion in model container [2020-11-22 12:49:39,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:49:39,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:49:39,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:39,539 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:49:39,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:39,594 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:49:39,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39 WrapperNode [2020-11-22 12:49:39,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:39,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:39,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:49:39,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:49:39,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:39,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:49:39,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:49:39,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:49:39,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... [2020-11-22 12:49:39,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:49:39,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:49:39,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:49:39,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:49:39,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/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 [2020-11-22 12:49:39,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:49:39,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:49:39,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-22 12:49:39,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:49:39,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:49:39,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 12:49:39,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:49:40,936 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:49:40,936 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-22 12:49:40,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:40 BoogieIcfgContainer [2020-11-22 12:49:40,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:49:40,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:49:40,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:49:40,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:49:40,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:49:39" (1/3) ... [2020-11-22 12:49:40,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2093ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:40, skipping insertion in model container [2020-11-22 12:49:40,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:39" (2/3) ... [2020-11-22 12:49:40,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2093ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:40, skipping insertion in model container [2020-11-22 12:49:40,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:40" (3/3) ... [2020-11-22 12:49:40,954 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2020-11-22 12:49:40,966 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:49:40,970 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:49:40,982 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 12:49:41,009 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:49:41,009 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:49:41,010 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:49:41,010 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:49:41,010 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:49:41,010 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:49:41,010 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:49:41,011 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:49:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-22 12:49:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 12:49:41,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:41,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:41,034 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:41,041 INFO L82 PathProgramCache]: Analyzing trace with hash 40951417, now seen corresponding path program 1 times [2020-11-22 12:49:41,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:41,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753607953] [2020-11-22 12:49:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:41,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753607953] [2020-11-22 12:49:41,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:41,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:49:41,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696113382] [2020-11-22 12:49:41,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:49:41,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:41,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:49:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:49:41,276 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-11-22 12:49:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:41,297 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2020-11-22 12:49:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:49:41,299 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-22 12:49:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:41,324 INFO L225 Difference]: With dead ends: 27 [2020-11-22 12:49:41,324 INFO L226 Difference]: Without dead ends: 12 [2020-11-22 12:49:41,327 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 [2020-11-22 12:49:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-22 12:49:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-22 12:49:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 12:49:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-22 12:49:41,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2020-11-22 12:49:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:41,366 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-22 12:49:41,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:49:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-22 12:49:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:49:41,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:41,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:41,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:49:41,367 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:41,369 INFO L82 PathProgramCache]: Analyzing trace with hash 487400052, now seen corresponding path program 1 times [2020-11-22 12:49:41,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:41,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237248553] [2020-11-22 12:49:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:49:41,452 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:49:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:49:41,548 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:49:41,595 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:49:41,595 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:49:41,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:49:41,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:49:41 BoogieIcfgContainer [2020-11-22 12:49:41,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:49:41,637 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:49:41,637 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:49:41,637 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:49:41,638 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:40" (3/4) ... [2020-11-22 12:49:41,642 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-22 12:49:41,642 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:49:41,647 INFO L168 Benchmark]: Toolchain (without parser) took 2401.27 ms. Allocated memory is still 111.1 MB. Free memory was 81.4 MB in the beginning and 64.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:41,649 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:41,651 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.66 ms. Allocated memory is still 111.1 MB. Free memory was 81.1 MB in the beginning and 88.1 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:41,652 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.69 ms. Allocated memory is still 111.1 MB. Free memory was 88.1 MB in the beginning and 86.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:41,653 INFO L168 Benchmark]: Boogie Preprocessor took 35.94 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 84.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:41,655 INFO L168 Benchmark]: RCFGBuilder took 1225.83 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 87.8 MB in the end (delta: -3.0 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:41,656 INFO L168 Benchmark]: TraceAbstraction took 694.26 ms. Allocated memory is still 111.1 MB. Free memory was 87.1 MB in the beginning and 64.8 MB in the end (delta: 22.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:41,657 INFO L168 Benchmark]: Witness Printer took 5.77 ms. Allocated memory is still 111.1 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:41,668 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 353.66 ms. Allocated memory is still 111.1 MB. Free memory was 81.1 MB in the beginning and 88.1 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.69 ms. Allocated memory is still 111.1 MB. Free memory was 88.1 MB in the beginning and 86.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.94 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 84.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1225.83 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 87.8 MB in the end (delta: -3.0 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 694.26 ms. Allocated memory is still 111.1 MB. Free memory was 87.1 MB in the beginning and 64.8 MB in the end (delta: 22.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.77 ms. Allocated memory is still 111.1 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 56, overapproximation of someBinaryArithmeticFLOAToperation at line 62. Possible FailurePath: [L62] float x = 0.0f / 0.0f; [L63] float y = 0.0f / 0.0f; [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; [L64] float res = fmax_float(x, y); [L56] return x != x; [L66] COND TRUE !isnan_float(res) [L3] __assert_fail("0", "float_req_bl_1250.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 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=14occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 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 [2020-11-22 12:49:44,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:49:44,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:49:44,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:49:44,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:49:44,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:49:44,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:49:44,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:49:44,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:49:44,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:49:44,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:49:44,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:49:44,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:49:44,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:49:44,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:49:44,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:49:44,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:49:44,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:49:44,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:49:44,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:49:44,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:49:44,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:49:44,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:49:44,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:49:44,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:49:44,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:49:44,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:49:44,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:49:44,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:49:44,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:49:44,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:49:44,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:49:44,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:49:44,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:49:44,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:49:44,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:49:44,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:49:44,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:49:44,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:49:44,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:49:44,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:49:44,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-22 12:49:44,956 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:49:44,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:49:44,959 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:49:44,959 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:49:44,959 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:49:44,959 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:49:44,960 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:49:44,960 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:49:44,960 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:49:44,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:49:44,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:49:44,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:49:44,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:49:44,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:49:44,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:49:44,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:49:44,965 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:49:44,965 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-22 12:49:44,966 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-22 12:49:44,966 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:49:44,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:49:44,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:49:44,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:49:44,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:49:44,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-22 12:49:44,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:49:44,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:49:44,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:49:44,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:49:44,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:49:44,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:49:44,969 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-22 12:49:44,969 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-22 12:49:44,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:49:44,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:49:44,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:49:44,984 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_4c3a489c-aca8-4608-84e5-346dff78a765/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7498db39da300a600c956afc9ee769ef7c520660 [2020-11-22 12:49:45,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:49:45,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:49:45,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:49:45,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:49:45,531 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:49:45,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2020-11-22 12:49:45,636 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data/10869dafb/6958f82ae2bf4409a1cc5a45b21efe5b/FLAGca0e8eb5f [2020-11-22 12:49:46,219 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:49:46,220 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2020-11-22 12:49:46,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data/10869dafb/6958f82ae2bf4409a1cc5a45b21efe5b/FLAGca0e8eb5f [2020-11-22 12:49:46,570 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/data/10869dafb/6958f82ae2bf4409a1cc5a45b21efe5b [2020-11-22 12:49:46,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:49:46,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:49:46,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:46,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:49:46,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:49:46,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f040992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46, skipping insertion in model container [2020-11-22 12:49:46,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:49:46,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:49:46,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:46,918 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:49:46,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:47,004 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:49:47,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47 WrapperNode [2020-11-22 12:49:47,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:47,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:47,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:49:47,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:49:47,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... [2020-11-22 12:49:47,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... [2020-11-22 12:49:47,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:47,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:49:47,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:49:47,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:49:47,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... [2020-11-22 12:49:47,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... [2020-11-22 12:49:47,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... [2020-11-22 12:49:47,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... [2020-11-22 12:49:47,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... [2020-11-22 12:49:47,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... [2020-11-22 12:49:47,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... [2020-11-22 12:49:47,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:49:47,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:49:47,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:49:47,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:49:47,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/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 [2020-11-22 12:49:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-22 12:49:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:49:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-22 12:49:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:49:47,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:49:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-11-22 12:49:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:49:47,888 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:49:47,888 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-22 12:49:47,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:47 BoogieIcfgContainer [2020-11-22 12:49:47,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:49:47,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:49:47,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:49:47,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:49:47,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:49:46" (1/3) ... [2020-11-22 12:49:47,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed398db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:47, skipping insertion in model container [2020-11-22 12:49:47,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:47" (2/3) ... [2020-11-22 12:49:47,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed398db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:47, skipping insertion in model container [2020-11-22 12:49:47,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:47" (3/3) ... [2020-11-22 12:49:47,902 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2020-11-22 12:49:47,916 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:49:47,921 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:49:47,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 12:49:47,980 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:49:47,980 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:49:47,980 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:49:47,981 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:49:47,981 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:49:47,982 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:49:47,982 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:49:47,982 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:49:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-22 12:49:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 12:49:48,001 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:48,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:48,002 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:48,008 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2020-11-22 12:49:48,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 12:49:48,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064806999] [2020-11-22 12:49:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/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 [2020-11-22 12:49:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:48,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-22 12:49:48,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:48,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:48,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064806999] [2020-11-22 12:49:48,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:48,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-22 12:49:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430716884] [2020-11-22 12:49:48,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:49:48,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 12:49:48,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:49:48,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:49:48,185 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-11-22 12:49:48,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:48,207 INFO L93 Difference]: Finished difference Result 55 states and 85 transitions. [2020-11-22 12:49:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:49:48,209 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-22 12:49:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:48,227 INFO L225 Difference]: With dead ends: 55 [2020-11-22 12:49:48,228 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 12:49:48,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:49:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 12:49:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-22 12:49:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 12:49:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-11-22 12:49:48,274 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2020-11-22 12:49:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:48,274 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-11-22 12:49:48,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:49:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-11-22 12:49:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 12:49:48,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:48,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:48,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-22 12:49:48,495 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:48,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2020-11-22 12:49:48,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 12:49:48,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829673654] [2020-11-22 12:49:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/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 [2020-11-22 12:49:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:48,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 12:49:48,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:48,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:48,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829673654] [2020-11-22 12:49:48,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:48,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-22 12:49:48,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465269621] [2020-11-22 12:49:48,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:49:48,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 12:49:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:49:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:49:48,681 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 6 states. [2020-11-22 12:49:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:48,825 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2020-11-22 12:49:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:49:48,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-22 12:49:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:48,827 INFO L225 Difference]: With dead ends: 52 [2020-11-22 12:49:48,828 INFO L226 Difference]: Without dead ends: 47 [2020-11-22 12:49:48,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:49:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-22 12:49:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-11-22 12:49:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-22 12:49:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-11-22 12:49:48,840 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2020-11-22 12:49:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:48,841 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-11-22 12:49:48,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:49:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-11-22 12:49:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 12:49:48,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:48,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:49,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-22 12:49:49,044 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2020-11-22 12:49:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 12:49:49,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025428461] [2020-11-22 12:49:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/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 [2020-11-22 12:49:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-22 12:49:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:49,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:49,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025428461] [2020-11-22 12:49:49,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:49,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-11-22 12:49:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884045128] [2020-11-22 12:49:49,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 12:49:49,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 12:49:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 12:49:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:49:49,489 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 10 states. [2020-11-22 12:49:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:50,016 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-11-22 12:49:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:49:50,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-22 12:49:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:50,020 INFO L225 Difference]: With dead ends: 36 [2020-11-22 12:49:50,020 INFO L226 Difference]: Without dead ends: 27 [2020-11-22 12:49:50,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-11-22 12:49:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-22 12:49:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-11-22 12:49:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 12:49:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-11-22 12:49:50,030 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 14 [2020-11-22 12:49:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:50,030 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-11-22 12:49:50,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 12:49:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-11-22 12:49:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 12:49:50,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:50,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:50,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-22 12:49:50,248 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:50,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1012428811, now seen corresponding path program 1 times [2020-11-22 12:49:50,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 12:49:50,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825694184] [2020-11-22 12:49:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-22 12:49:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 12:49:50,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:50,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:50,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825694184] [2020-11-22 12:49:50,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:50,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-22 12:49:50,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677000060] [2020-11-22 12:49:50,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:49:50,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 12:49:50,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:49:50,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:49:50,588 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 6 states. [2020-11-22 12:49:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:50,750 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-11-22 12:49:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:49:50,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-22 12:49:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:50,756 INFO L225 Difference]: With dead ends: 52 [2020-11-22 12:49:50,756 INFO L226 Difference]: Without dead ends: 47 [2020-11-22 12:49:50,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:49:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-22 12:49:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-11-22 12:49:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-22 12:49:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-11-22 12:49:50,765 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 16 [2020-11-22 12:49:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:50,765 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-11-22 12:49:50,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:49:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-11-22 12:49:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 12:49:50,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:50,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:50,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-22 12:49:50,968 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:50,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:50,968 INFO L82 PathProgramCache]: Analyzing trace with hash -356841937, now seen corresponding path program 1 times [2020-11-22 12:49:50,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 12:49:50,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410375720] [2020-11-22 12:49:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-22 12:49:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:51,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 12:49:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:51,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:51,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410375720] [2020-11-22 12:49:51,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:51,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2020-11-22 12:49:51,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557800705] [2020-11-22 12:49:51,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-22 12:49:51,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 12:49:51,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-22 12:49:51,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-22 12:49:51,497 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 12 states. [2020-11-22 12:49:52,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:52,009 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-11-22 12:49:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:49:52,010 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-11-22 12:49:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:52,011 INFO L225 Difference]: With dead ends: 32 [2020-11-22 12:49:52,011 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 12:49:52,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-22 12:49:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 12:49:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-22 12:49:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 12:49:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-22 12:49:52,017 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-11-22 12:49:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:52,017 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-22 12:49:52,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-22 12:49:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-22 12:49:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 12:49:52,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:52,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:52,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-22 12:49:52,240 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:52,241 INFO L82 PathProgramCache]: Analyzing trace with hash -208376157, now seen corresponding path program 1 times [2020-11-22 12:49:52,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 12:49:52,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428178428] [2020-11-22 12:49:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-22 12:49:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-22 12:49:52,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:52,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:52,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428178428] [2020-11-22 12:49:52,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:52,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-11-22 12:49:52,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096332280] [2020-11-22 12:49:52,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 12:49:52,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 12:49:52,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 12:49:52,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:49:52,625 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-11-22 12:49:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:52,937 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-11-22 12:49:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:49:52,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-11-22 12:49:52,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:52,938 INFO L225 Difference]: With dead ends: 23 [2020-11-22 12:49:52,938 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:49:52,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-11-22 12:49:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:49:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:49:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:49:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:49:52,939 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-22 12:49:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:52,939 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:49:52,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 12:49:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:49:52,940 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:49:53,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-22 12:49:53,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:49:53,414 INFO L270 CegarLoopResult]: At program point L56(line 56) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)) |ULTIMATE.start_fmax_float_#res|)) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-11-22 12:49:53,414 INFO L274 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-11-22 12:49:53,415 INFO L274 CegarLoopResult]: For program point L52-2(line 52) no Hoare annotation was computed. [2020-11-22 12:49:53,415 INFO L270 CegarLoopResult]: At program point L52-3(lines 44 53) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)) |ULTIMATE.start_fmax_float_#res|)) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-11-22 12:49:53,415 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-22 12:49:53,415 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-11-22 12:49:53,415 INFO L274 CegarLoopResult]: For program point L32(lines 32 41) no Hoare annotation was computed. [2020-11-22 12:49:53,415 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-22 12:49:53,415 INFO L274 CegarLoopResult]: For program point L32-1(lines 32 41) no Hoare annotation was computed. [2020-11-22 12:49:53,416 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:49:53,416 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-22 12:49:53,416 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 12:49:53,416 INFO L274 CegarLoopResult]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2020-11-22 12:49:53,416 INFO L270 CegarLoopResult]: At program point L24-2(lines 24 28) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-11-22 12:49:53,417 INFO L274 CegarLoopResult]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2020-11-22 12:49:53,417 INFO L274 CegarLoopResult]: For program point L24-5(lines 24 28) no Hoare annotation was computed. [2020-11-22 12:49:53,417 INFO L270 CegarLoopResult]: At program point L24-6(lines 24 28) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-11-22 12:49:53,417 INFO L274 CegarLoopResult]: For program point L24-7(lines 21 42) no Hoare annotation was computed. [2020-11-22 12:49:53,417 INFO L274 CegarLoopResult]: For program point L49(lines 49 51) no Hoare annotation was computed. [2020-11-22 12:49:53,417 INFO L274 CegarLoopResult]: For program point L45(lines 45 47) no Hoare annotation was computed. [2020-11-22 12:49:53,417 INFO L270 CegarLoopResult]: At program point L41(lines 21 42) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-11-22 12:49:53,418 INFO L270 CegarLoopResult]: At program point L41-1(lines 21 42) the Hoare annotation is: (let ((.cse0 (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)))) (or (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) .cse0) (and (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) .cse0))) [2020-11-22 12:49:53,418 INFO L274 CegarLoopResult]: For program point L66(lines 66 69) no Hoare annotation was computed. [2020-11-22 12:49:53,418 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:49:53,418 INFO L277 CegarLoopResult]: At program point L71(lines 58 72) the Hoare annotation is: true [2020-11-22 12:49:53,418 INFO L274 CegarLoopResult]: For program point L38(lines 38 41) no Hoare annotation was computed. [2020-11-22 12:49:53,418 INFO L274 CegarLoopResult]: For program point L38-1(lines 38 41) no Hoare annotation was computed. [2020-11-22 12:49:53,418 INFO L274 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-11-22 12:49:53,419 INFO L274 CegarLoopResult]: For program point L35-1(lines 35 41) no Hoare annotation was computed. [2020-11-22 12:49:53,436 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-11-22 12:49:53,437 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-11-22 12:49:53,442 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-11-22 12:49:53,443 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-11-22 12:49:53,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:49:53 BoogieIcfgContainer [2020-11-22 12:49:53,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:49:53,447 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:49:53,449 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:49:53,449 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:49:53,450 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:47" (3/4) ... [2020-11-22 12:49:53,453 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:49:53,469 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-22 12:49:53,469 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-22 12:49:53,469 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 12:49:53,470 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:49:53,504 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == \result) && !~fp.eq~FLOAT(y, y) [2020-11-22 12:49:53,504 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == \result) && 1bv32 == \result) && !~fp.eq~FLOAT(y, y) [2020-11-22 12:49:53,505 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y)) || (!(0bv32 == \result) && !~fp.eq~FLOAT(y, y)) [2020-11-22 12:49:53,563 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4c3a489c-aca8-4608-84e5-346dff78a765/bin/utaipan/witness.graphml [2020-11-22 12:49:53,563 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:49:53,568 INFO L168 Benchmark]: Toolchain (without parser) took 6989.42 ms. Allocated memory was 60.8 MB in the beginning and 92.3 MB in the end (delta: 31.5 MB). Free memory was 41.5 MB in the beginning and 62.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,568 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 60.8 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:53,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 424.72 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 30.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,570 INFO L168 Benchmark]: Boogie Procedure Inliner took 97.55 ms. Allocated memory is still 60.8 MB. Free memory was 30.6 MB in the beginning and 43.8 MB in the end (delta: -13.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,570 INFO L168 Benchmark]: Boogie Preprocessor took 69.11 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 42.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:53,571 INFO L168 Benchmark]: RCFGBuilder took 718.10 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 41.4 MB in the end (delta: 733.5 kB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,571 INFO L168 Benchmark]: TraceAbstraction took 5551.47 ms. Allocated memory was 60.8 MB in the beginning and 92.3 MB in the end (delta: 31.5 MB). Free memory was 40.9 MB in the beginning and 66.3 MB in the end (delta: -25.4 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,572 INFO L168 Benchmark]: Witness Printer took 116.69 ms. Allocated memory is still 92.3 MB. Free memory was 66.3 MB in the beginning and 62.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,576 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 60.8 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 424.72 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 30.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 97.55 ms. Allocated memory is still 60.8 MB. Free memory was 30.6 MB in the beginning and 43.8 MB in the end (delta: -13.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.11 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 42.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 718.10 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 41.4 MB in the end (delta: 733.5 kB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5551.47 ms. Allocated memory was 60.8 MB in the beginning and 92.3 MB in the end (delta: 31.5 MB). Free memory was 40.9 MB in the beginning and 66.3 MB in the end (delta: -25.4 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. * Witness Printer took 116.69 ms. Allocated memory is still 92.3 MB. Free memory was 66.3 MB in the beginning and 62.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 44]: Loop Invariant [2020-11-22 12:49:53,590 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-11-22 12:49:53,590 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: (\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == \result) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 56]: Loop Invariant [2020-11-22 12:49:53,591 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-11-22 12:49:53,592 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: ((\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == \result) && 1bv32 == \result) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (!~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y)) || (!(0bv32 == \result) && !~fp.eq~FLOAT(y, y)) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 117 SDslu, 549 SDs, 0 SdLazy, 138 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 19 NumberOfFragments, 74 HoareAnnotationTreeSize, 7 FomulaSimplifications, 231 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 164 ConstructedInterpolants, 36 QuantifiedInterpolants, 8446 SizeOfPredicates, 32 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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 correct! Received shutdown request...