./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_poly2.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_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d97d268d682e2021ff98bdbb1deaf100696d038 .............................................................................................................................................................................................................................................................................................................. 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_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d97d268d682e2021ff98bdbb1deaf100696d038 .......................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:43:42,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:43:42,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:43:42,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:43:42,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:43:42,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:43:42,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:43:42,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:43:42,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:43:42,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:43:42,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:43:42,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:43:42,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:43:42,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:43:42,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:43:42,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:43:42,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:43:42,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:43:42,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:43:42,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:43:42,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:43:42,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:43:42,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:43:42,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:43:42,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:43:42,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:43:42,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:43:42,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:43:42,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:43:42,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:43:42,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:43:42,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:43:42,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:43:42,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:43:42,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:43:42,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:43:42,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:43:42,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:43:42,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:43:42,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:43:42,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:43:42,774 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:43:42,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:43:42,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:43:42,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:43:42,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:43:42,808 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:43:42,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:43:42,809 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:43:42,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:43:42,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:43:42,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:43:42,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:43:42,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:43:42,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:43:42,811 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:43:42,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:43:42,812 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:43:42,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:43:42,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:43:42,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:43:42,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:43:42,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:43:42,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:43:42,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:43:42,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:43:42,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:43:42,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:43:42,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:43:42,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:43:42,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:43:42,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-29 19:43:43,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:43:43,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:43:43,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:43:43,153 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:43:43,156 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:43:43,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-29 19:43:43,238 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data/32afc18b0/ee89e6e427b1424f805c80d3e6e03a38/FLAGc673d9c52 [2020-11-29 19:43:43,795 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:43:43,795 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-29 19:43:43,803 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data/32afc18b0/ee89e6e427b1424f805c80d3e6e03a38/FLAGc673d9c52 [2020-11-29 19:43:44,161 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data/32afc18b0/ee89e6e427b1424f805c80d3e6e03a38 [2020-11-29 19:43:44,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:43:44,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:43:44,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:43:44,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:43:44,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:43:44,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e4e239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44, skipping insertion in model container [2020-11-29 19:43:44,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:43:44,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:43:44,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:43:44,450 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:43:44,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:43:44,532 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:43:44,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44 WrapperNode [2020-11-29 19:43:44,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:43:44,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:43:44,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:43:44,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:43:44,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:43:44,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:43:44,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:43:44,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:43:44,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... [2020-11-29 19:43:44,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:43:44,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:43:44,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:43:44,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:43:44,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/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 [2020-11-29 19:43:44,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:43:44,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:43:44,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-29 19:43:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 19:43:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-29 19:43:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:43:44,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:43:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 19:43:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:43:45,182 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:43:45,182 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-29 19:43:45,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:45 BoogieIcfgContainer [2020-11-29 19:43:45,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:43:45,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:43:45,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:43:45,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:43:45,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:43:44" (1/3) ... [2020-11-29 19:43:45,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddd789a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:43:45, skipping insertion in model container [2020-11-29 19:43:45,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:44" (2/3) ... [2020-11-29 19:43:45,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddd789a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:43:45, skipping insertion in model container [2020-11-29 19:43:45,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:45" (3/3) ... [2020-11-29 19:43:45,216 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-29 19:43:45,242 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:43:45,249 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:43:45,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:43:45,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:43:45,293 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:43:45,293 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:43:45,293 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:43:45,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:43:45,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:43:45,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:43:45,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:43:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-29 19:43:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:43:45,312 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:45,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:45,313 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:45,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-11-29 19:43:45,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:45,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852080308] [2020-11-29 19:43:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:45,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852080308] [2020-11-29 19:43:45,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:45,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:43:45,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262056479] [2020-11-29 19:43:45,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:43:45,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:45,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:43:45,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:43:45,523 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-29 19:43:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:45,556 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-29 19:43:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:43:45,558 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-29 19:43:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:45,572 INFO L225 Difference]: With dead ends: 26 [2020-11-29 19:43:45,573 INFO L226 Difference]: Without dead ends: 10 [2020-11-29 19:43:45,586 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 [2020-11-29 19:43:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-29 19:43:45,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-29 19:43:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 19:43:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-29 19:43:45,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-11-29 19:43:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:45,649 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-29 19:43:45,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:43:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-29 19:43:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:43:45,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:45,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:45,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:43:45,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-11-29 19:43:45,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:45,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957590390] [2020-11-29 19:43:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:45,761 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:45,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:45,851 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:45,852 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:43:45,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:43:45,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:43:45 BoogieIcfgContainer [2020-11-29 19:43:45,907 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:43:45,908 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:43:45,909 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:43:45,909 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:43:45,910 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:45" (3/4) ... [2020-11-29 19:43:45,914 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:43:45,914 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:43:45,917 INFO L168 Benchmark]: Toolchain (without parser) took 1748.50 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 78.6 MB in the beginning and 93.7 MB in the end (delta: -15.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:45,918 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 104.9 MB. Free memory was 63.6 MB in the beginning and 63.6 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:43:45,919 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.29 ms. Allocated memory is still 104.9 MB. Free memory was 78.3 MB in the beginning and 81.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:45,919 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.57 ms. Allocated memory is still 104.9 MB. Free memory was 81.7 MB in the beginning and 79.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:43:45,920 INFO L168 Benchmark]: Boogie Preprocessor took 55.64 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:45,921 INFO L168 Benchmark]: RCFGBuilder took 510.40 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 63.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:45,922 INFO L168 Benchmark]: TraceAbstraction took 709.24 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 62.8 MB in the beginning and 94.2 MB in the end (delta: -31.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:43:45,923 INFO L168 Benchmark]: Witness Printer took 5.88 ms. Allocated memory is still 125.8 MB. Free memory is still 93.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:43:45,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 104.9 MB. Free memory was 63.6 MB in the beginning and 63.6 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 363.29 ms. Allocated memory is still 104.9 MB. Free memory was 78.3 MB in the beginning and 81.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.57 ms. Allocated memory is still 104.9 MB. Free memory was 81.7 MB in the beginning and 79.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.64 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 510.40 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 63.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 709.24 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 62.8 MB in the beginning and 94.2 MB in the end (delta: -31.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.88 ms. Allocated memory is still 125.8 MB. Free memory is still 93.7 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 bitwiseOr at line 38, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation at line 65. Possible FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "reach_error") VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 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=15occurred 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, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 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 [2020-11-29 19:43:49,089 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-11-29 19:43:49,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:43:49,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:43:49,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:43:49,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:43:49,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:43:49,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:43:49,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:43:49,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:43:49,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:43:49,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:43:49,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:43:49,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 19:43:49,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:43:49,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:43:49,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:43:49,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:43:49,341 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:43:49,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:43:49,342 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:43:49,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:43:49,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:43:49,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:43:49,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:43:49,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:43:49,345 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 19:43:49,345 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 19:43:49,345 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:43:49,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:43:49,346 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:43:49,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:43:49,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:43:49,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:43:49,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:43:49,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:43:49,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:43:49,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:43:49,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:43:49,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:43:49,349 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 19:43:49,349 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 19:43:49,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:43:49,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:43:49,350 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 19:43:49,350 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_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-29 19:43:49,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:43:49,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:43:49,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:43:49,900 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:43:49,901 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:43:49,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-29 19:43:49,999 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data/cb3ab8ae0/1c0798d3f83848d8aebae7f8193f34a0/FLAG1f6aa3c10 [2020-11-29 19:43:50,749 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:43:50,750 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-29 19:43:50,757 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data/cb3ab8ae0/1c0798d3f83848d8aebae7f8193f34a0/FLAG1f6aa3c10 [2020-11-29 19:43:51,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/data/cb3ab8ae0/1c0798d3f83848d8aebae7f8193f34a0 [2020-11-29 19:43:51,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:43:51,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:43:51,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:43:51,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:43:51,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:43:51,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2815b323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51, skipping insertion in model container [2020-11-29 19:43:51,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:43:51,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:43:51,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:43:51,370 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:43:51,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:43:51,440 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:43:51,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51 WrapperNode [2020-11-29 19:43:51,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:43:51,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:43:51,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:43:51,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:43:51,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:43:51,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:43:51,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:43:51,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:43:51,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... [2020-11-29 19:43:51,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:43:51,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:43:51,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:43:51,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:43:51,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/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 [2020-11-29 19:43:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-11-29 19:43:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-29 19:43:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 19:43:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:43:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-29 19:43:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:43:51,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:43:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:43:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-29 19:43:55,195 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:43:55,196 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-29 19:43:55,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:55 BoogieIcfgContainer [2020-11-29 19:43:55,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:43:55,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:43:55,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:43:55,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:43:55,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:43:51" (1/3) ... [2020-11-29 19:43:55,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1599ec65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:43:55, skipping insertion in model container [2020-11-29 19:43:55,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:51" (2/3) ... [2020-11-29 19:43:55,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1599ec65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:43:55, skipping insertion in model container [2020-11-29 19:43:55,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:55" (3/3) ... [2020-11-29 19:43:55,242 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-29 19:43:55,268 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:43:55,273 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:43:55,286 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:43:55,310 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:43:55,310 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:43:55,310 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:43:55,310 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:43:55,311 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:43:55,311 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:43:55,311 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:43:55,311 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:43:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-29 19:43:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:43:55,329 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:55,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:55,331 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:55,338 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-11-29 19:43:55,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:43:55,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199226156] [2020-11-29 19:43:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/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 [2020-11-29 19:43:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 19:43:57,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:57,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:43:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:57,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199226156] [2020-11-29 19:43:57,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:57,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 19:43:57,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172916061] [2020-11-29 19:43:57,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:43:57,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:43:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:43:57,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:43:57,250 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-29 19:43:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:57,278 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-29 19:43:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:43:57,280 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-29 19:43:57,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:57,294 INFO L225 Difference]: With dead ends: 26 [2020-11-29 19:43:57,295 INFO L226 Difference]: Without dead ends: 10 [2020-11-29 19:43:57,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:43:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-29 19:43:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-29 19:43:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 19:43:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-29 19:43:57,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-11-29 19:43:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:57,352 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-29 19:43:57,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:43:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-29 19:43:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:43:57,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:57,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:57,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 19:43:57,567 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-11-29 19:43:57,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:43:57,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697137442] [2020-11-29 19:43:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/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 [2020-11-29 19:43:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:59,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:44:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:44:01,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:44:01,919 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 19:44:01,920 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:44:02,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 19:44:02,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:44:02 BoogieIcfgContainer [2020-11-29 19:44:02,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:44:02,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:44:02,173 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:44:02,174 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:44:02,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:55" (3/4) ... [2020-11-29 19:44:02,177 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:44:02,243 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_63228083-769a-4364-828f-c888af54a933/bin/uautomizer/witness.graphml [2020-11-29 19:44:02,244 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:44:02,246 INFO L168 Benchmark]: Toolchain (without parser) took 11148.44 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 35.8 MB in the beginning and 32.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:02,247 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 56.6 MB. Free memory is still 39.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:44:02,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.88 ms. Allocated memory is still 56.6 MB. Free memory was 35.6 MB in the beginning and 24.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:02,248 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.98 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 24.4 MB in the beginning and 52.9 MB in the end (delta: -28.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:02,249 INFO L168 Benchmark]: Boogie Preprocessor took 75.66 ms. Allocated memory is still 69.2 MB. Free memory was 52.9 MB in the beginning and 51.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:02,250 INFO L168 Benchmark]: RCFGBuilder took 3574.97 ms. Allocated memory is still 69.2 MB. Free memory was 51.2 MB in the beginning and 35.5 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:02,251 INFO L168 Benchmark]: TraceAbstraction took 6973.11 ms. Allocated memory is still 69.2 MB. Free memory was 35.0 MB in the beginning and 34.8 MB in the end (delta: 216.3 kB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:02,252 INFO L168 Benchmark]: Witness Printer took 70.61 ms. Allocated memory is still 69.2 MB. Free memory was 34.8 MB in the beginning and 32.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:02,256 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 56.6 MB. Free memory is still 39.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 342.88 ms. Allocated memory is still 56.6 MB. Free memory was 35.6 MB in the beginning and 24.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 102.98 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 24.4 MB in the beginning and 52.9 MB in the end (delta: -28.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.66 ms. Allocated memory is still 69.2 MB. Free memory was 52.9 MB in the beginning and 51.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3574.97 ms. Allocated memory is still 69.2 MB. Free memory was 51.2 MB in the beginning and 35.5 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6973.11 ms. Allocated memory is still 69.2 MB. Free memory was 35.0 MB in the beginning and 34.8 MB in the end (delta: 216.3 kB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. * Witness Printer took 70.61 ms. Allocated memory is still 69.2 MB. Free memory was 34.8 MB in the beginning and 32.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "reach_error") VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.8s, 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, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 3.5s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 128 SizeOfPredicates, 0 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...