./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-floats-scientific-comp/loop3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 aa6dc04e2032f85ae9f089e49cae5f055c266957 ..................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 aa6dc04e2032f85ae9f089e49cae5f055c266957 ....................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:40,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:40,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:40,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:40,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:40,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:40,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:40,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:40,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:40,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:40,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:40,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:40,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:40,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:40,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:40,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:40,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:40,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:40,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:40,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:40,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:40,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:40,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:40,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:40,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:40,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:40,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:40,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:40,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:40,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:40,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:40,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:40,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:40,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:40,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:40,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:40,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:40,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:40,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:40,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:40,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:40,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:40:40,165 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:40,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:40,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:40,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:40,168 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:40,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:40,168 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:40,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:40:40,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:40,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:40,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:40,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:40,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:40,171 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:40,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:40,171 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:40,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:40,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:40,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:40,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:40,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:40,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:40,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:40,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:40,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:40,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:40:40,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:40:40,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:40,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:40,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> aa6dc04e2032f85ae9f089e49cae5f055c266957 [2020-10-20 00:40:40,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:40,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:40,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:40,437 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:40,437 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:40,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop3.c [2020-10-20 00:40:40,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd6e153f8/fc4b3fa95163405f949dc92565449b53/FLAG01629ddc5 [2020-10-20 00:40:41,024 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:41,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop3.c [2020-10-20 00:40:41,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd6e153f8/fc4b3fa95163405f949dc92565449b53/FLAG01629ddc5 [2020-10-20 00:40:41,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd6e153f8/fc4b3fa95163405f949dc92565449b53 [2020-10-20 00:40:41,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:41,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:41,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:41,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:41,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:41,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3883e37e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41, skipping insertion in model container [2020-10-20 00:40:41,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:41,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:41,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:41,532 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:41,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:41,570 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:41,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41 WrapperNode [2020-10-20 00:40:41,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:41,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:41,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:41,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:41,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:41,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:41,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:41,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:41,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:41,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:41,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:41,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:41,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:40:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:41,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:41,924 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:41,925 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-20 00:40:41,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:41 BoogieIcfgContainer [2020-10-20 00:40:41,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:41,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:41,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:41,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:41,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:41" (1/3) ... [2020-10-20 00:40:41,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34603550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:41, skipping insertion in model container [2020-10-20 00:40:41,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41" (2/3) ... [2020-10-20 00:40:41,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34603550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:41, skipping insertion in model container [2020-10-20 00:40:41,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:41" (3/3) ... [2020-10-20 00:40:41,935 INFO L111 eAbstractionObserver]: Analyzing ICFG loop3.c [2020-10-20 00:40:41,946 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:41,953 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:41,966 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:41,989 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:41,989 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:41,989 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:41,989 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:41,990 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:41,990 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:41,990 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:41,990 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-20 00:40:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:40:42,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:42,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:42,011 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:42,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:42,015 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-10-20 00:40:42,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:42,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269048292] [2020-10-20 00:40:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:42,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269048292] [2020-10-20 00:40:42,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:42,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:40:42,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491849145] [2020-10-20 00:40:42,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:42,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:42,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:42,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:42,183 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-20 00:40:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:42,199 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-10-20 00:40:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:42,201 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:40:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:42,210 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:40:42,210 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:40:42,213 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 [2020-10-20 00:40:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:40:42,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:40:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:40:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-20 00:40:42,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-10-20 00:40:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:42,244 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-20 00:40:42,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-20 00:40:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:42,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:42,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:42,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:40:42,246 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:42,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-10-20 00:40:42,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:42,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144565550] [2020-10-20 00:40:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144565550] [2020-10-20 00:40:42,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:42,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:40:42,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787046164] [2020-10-20 00:40:42,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:40:42,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:42,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:40:42,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:40:42,342 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-20 00:40:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:42,359 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-20 00:40:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:40:42,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 00:40:42,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:42,361 INFO L225 Difference]: With dead ends: 23 [2020-10-20 00:40:42,361 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 00:40:42,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:40:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 00:40:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-20 00:40:42,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 00:40:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-20 00:40:42,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-20 00:40:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:42,368 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-20 00:40:42,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:40:42,369 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-20 00:40:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:42,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:42,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:42,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:40:42,370 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:42,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-10-20 00:40:42,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:42,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77932009] [2020-10-20 00:40:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:42,396 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:42,424 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:42,453 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:40:42,453 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:42,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:40:42,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:42 BoogieIcfgContainer [2020-10-20 00:40:42,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:42,506 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:42,506 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:42,507 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:42,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:41" (3/4) ... [2020-10-20 00:40:42,512 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:40:42,512 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:42,515 INFO L168 Benchmark]: Toolchain (without parser) took 1234.61 ms. Allocated memory was 41.9 MB in the beginning and 47.2 MB in the end (delta: 5.2 MB). Free memory was 22.3 MB in the beginning and 28.7 MB in the end (delta: -6.4 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:40:42,516 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 32.0 MB. Free memory was 11.0 MB in the beginning and 10.9 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:42,517 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.32 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.4 MB in the beginning and 22.2 MB in the end (delta: -805.3 kB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:42,518 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.69 ms. Allocated memory is still 42.5 MB. Free memory was 22.2 MB in the beginning and 20.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:42,518 INFO L168 Benchmark]: Boogie Preprocessor took 26.11 ms. Allocated memory is still 42.5 MB. Free memory was 20.5 MB in the beginning and 19.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:42,520 INFO L168 Benchmark]: RCFGBuilder took 288.38 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 19.0 MB in the beginning and 22.6 MB in the end (delta: -3.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:42,521 INFO L168 Benchmark]: TraceAbstraction took 578.20 ms. Allocated memory was 44.0 MB in the beginning and 47.2 MB in the end (delta: 3.1 MB). Free memory was 22.2 MB in the beginning and 29.0 MB in the end (delta: -6.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:42,522 INFO L168 Benchmark]: Witness Printer took 6.18 ms. Allocated memory is still 47.2 MB. Free memory was 29.0 MB in the beginning and 28.7 MB in the end (delta: 332.9 kB). Peak memory consumption was 332.9 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:42,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 32.0 MB. Free memory was 11.0 MB in the beginning and 10.9 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 286.32 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.4 MB in the beginning and 22.2 MB in the end (delta: -805.3 kB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 39.69 ms. Allocated memory is still 42.5 MB. Free memory was 22.2 MB in the beginning and 20.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 26.11 ms. Allocated memory is still 42.5 MB. Free memory was 20.5 MB in the beginning and 19.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 288.38 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 19.0 MB in the beginning and 22.6 MB in the end (delta: -3.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 578.20 ms. Allocated memory was 44.0 MB in the beginning and 47.2 MB in the end (delta: 3.1 MB). Free memory was 22.2 MB in the beginning and 29.0 MB in the end (delta: -6.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 14.3 GB. * Witness Printer took 6.18 ms. Allocated memory is still 47.2 MB. Free memory was 29.0 MB in the beginning and 28.7 MB in the end (delta: 332.9 kB). Peak memory consumption was 332.9 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 51, overapproximation of to_real at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 37. Possible FailurePath: [L15] float pi = 3.14159 ; VAL [pi=314159/100000] [L21] float x = __VERIFIER_nondet_float() ; [L22] float octant1 = 0 ; [L23] float octant2 = pi/8 ; [L11] COND FALSE !(!cond) VAL [pi=314159/100000] [L25] float oddExp = x ; [L26] float evenExp = 1.0 ; [L27] float term = x ; [L28] unsigned int count = 2 ; [L29] int multFactor = 0 ; [L30] int temp ; VAL [pi=314159/100000] [L32] COND TRUE 1 [L34] term = term * (x/count) VAL [pi=314159/100000] [L35] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=314159/100000] [L35] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L37] evenExp = evenExp + multFactor*term [L39] count++ [L41] term = term * (x/count) [L43] oddExp = oddExp + multFactor*term [L45] count++ [L47] temp = __VERIFIER_nondet_int() [L48] COND TRUE temp == 0 VAL [pi=314159/100000] [L13] COND TRUE !(cond) VAL [pi=314159/100000] [L8] __assert_fail("0", "loop3.c", 8, "reach_error") VAL [pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 1 SDslu, 8 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 189 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:44,620 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-10-20 00:40:44,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:44,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:44,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:44,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:44,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:44,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:44,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:44,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:44,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:44,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:44,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:44,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:40:44,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:44,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:44,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:44,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:44,738 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:44,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:44,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:44,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:44,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:44,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:44,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:44,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:44,739 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:40:44,739 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:40:44,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:44,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:44,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:44,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:44,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:44,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:44,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:44,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:44,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:44,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:44,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:44,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:44,742 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:40:44,742 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:40:44,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:44,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:44,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:40:44,743 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> aa6dc04e2032f85ae9f089e49cae5f055c266957 [2020-10-20 00:40:44,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:44,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:44,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:44,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:44,959 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:44,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop3.c [2020-10-20 00:40:45,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9122d03b5/84691c876d5f48d98cf5637f8641f6d7/FLAG1453aae6d [2020-10-20 00:40:45,540 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:45,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop3.c [2020-10-20 00:40:45,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9122d03b5/84691c876d5f48d98cf5637f8641f6d7/FLAG1453aae6d [2020-10-20 00:40:45,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9122d03b5/84691c876d5f48d98cf5637f8641f6d7 [2020-10-20 00:40:45,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:45,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:45,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:45,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:45,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:45,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:45" (1/1) ... [2020-10-20 00:40:45,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6429f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:45, skipping insertion in model container [2020-10-20 00:40:45,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:45" (1/1) ... [2020-10-20 00:40:45,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:45,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:46,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:46,145 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:46,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:46,182 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:46,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46 WrapperNode [2020-10-20 00:40:46,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:46,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:46,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:46,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:46,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... [2020-10-20 00:40:46,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... [2020-10-20 00:40:46,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:46,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:46,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:46,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:46,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... [2020-10-20 00:40:46,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... [2020-10-20 00:40:46,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... [2020-10-20 00:40:46,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... [2020-10-20 00:40:46,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... [2020-10-20 00:40:46,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... [2020-10-20 00:40:46,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... [2020-10-20 00:40:46,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:46,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:46,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:46,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:46,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:46,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:40:46,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:46,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:46,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:50,035 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:50,036 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-20 00:40:50,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:50 BoogieIcfgContainer [2020-10-20 00:40:50,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:50,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:50,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:50,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:50,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:45" (1/3) ... [2020-10-20 00:40:50,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d857b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:50, skipping insertion in model container [2020-10-20 00:40:50,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:46" (2/3) ... [2020-10-20 00:40:50,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d857b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:50, skipping insertion in model container [2020-10-20 00:40:50,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:50" (3/3) ... [2020-10-20 00:40:50,046 INFO L111 eAbstractionObserver]: Analyzing ICFG loop3.c [2020-10-20 00:40:50,057 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:50,064 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:50,074 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:50,095 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:50,095 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:50,096 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:50,096 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:50,096 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:50,096 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:50,097 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:50,097 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-20 00:40:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:40:50,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:50,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:50,115 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:50,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:50,120 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-10-20 00:40:50,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:50,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754558899] [2020-10-20 00:40:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:50,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:40:50,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:50,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:50,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754558899] [2020-10-20 00:40:50,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:50,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:40:50,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607861242] [2020-10-20 00:40:50,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:50,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:50,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:50,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:50,303 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-20 00:40:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:50,317 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-10-20 00:40:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:50,318 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:40:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:50,326 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:40:50,327 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:40:50,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:50,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:40:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:40:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:40:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-20 00:40:50,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-10-20 00:40:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:50,357 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-20 00:40:50,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-20 00:40:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:50,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:50,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:50,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:40:50,564 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-10-20 00:40:50,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:50,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976369921] [2020-10-20 00:40:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:51,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 00:40:51,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:51,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:51,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976369921] [2020-10-20 00:40:51,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:51,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:40:51,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181669243] [2020-10-20 00:40:51,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:51,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:51,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:51,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:51,303 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-10-20 00:40:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:56,135 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-20 00:40:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:56,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:40:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:56,137 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:40:56,137 INFO L226 Difference]: Without dead ends: 16 [2020-10-20 00:40:56,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-20 00:40:56,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-20 00:40:56,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 00:40:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-20 00:40:56,142 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-20 00:40:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:56,142 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-20 00:40:56,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:56,143 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-20 00:40:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:56,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:56,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:56,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:40:56,358 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:56,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-10-20 00:40:56,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:56,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816677402] [2020-10-20 00:40:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 00:40:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:59,362 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-20 00:40:59,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816677402] [2020-10-20 00:40:59,373 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:40:59,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [971991326] [2020-10-20 00:40:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 00:41:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:41:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-20 00:41:01,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:41:01,641 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:41:01,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307569691] [2020-10-20 00:41:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:41:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:41:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 00:41:58,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:41:58,166 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:41:58,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:41:58,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 00:41:58,168 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 00:41:58,168 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:41:58,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:41:58,793 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 00:41:58,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:41:58 BoogieIcfgContainer [2020-10-20 00:41:58,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:41:58,795 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:41:58,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:41:58,795 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:41:58,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:50" (3/4) ... [2020-10-20 00:41:58,799 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:41:58,799 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:41:58,801 INFO L168 Benchmark]: Toolchain (without parser) took 72895.22 ms. Allocated memory was 41.4 MB in the beginning and 46.7 MB in the end (delta: 5.2 MB). Free memory was 20.0 MB in the beginning and 14.9 MB in the end (delta: 5.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:58,802 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.6 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:41:58,803 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.90 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 19.2 MB in the beginning and 19.4 MB in the end (delta: -285.0 kB). Peak memory consumption was 10.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:58,804 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.44 ms. Allocated memory is still 41.9 MB. Free memory was 19.4 MB in the beginning and 17.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:58,805 INFO L168 Benchmark]: Boogie Preprocessor took 28.05 ms. Allocated memory is still 41.9 MB. Free memory was 17.6 MB in the beginning and 16.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:58,806 INFO L168 Benchmark]: RCFGBuilder took 3785.27 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 16.0 MB in the beginning and 18.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 7.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:58,807 INFO L168 Benchmark]: TraceAbstraction took 68755.46 ms. Allocated memory was 43.5 MB in the beginning and 46.7 MB in the end (delta: 3.1 MB). Free memory was 18.2 MB in the beginning and 15.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 6.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:58,808 INFO L168 Benchmark]: Witness Printer took 4.69 ms. Allocated memory is still 46.7 MB. Free memory was 15.2 MB in the beginning and 14.9 MB in the end (delta: 353.0 kB). Peak memory consumption was 353.0 kB. Max. memory is 14.3 GB. [2020-10-20 00:41:58,814 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.6 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 270.90 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 19.2 MB in the beginning and 19.4 MB in the end (delta: -285.0 kB). Peak memory consumption was 10.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 40.44 ms. Allocated memory is still 41.9 MB. Free memory was 19.4 MB in the beginning and 17.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 28.05 ms. Allocated memory is still 41.9 MB. Free memory was 17.6 MB in the beginning and 16.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 3785.27 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 16.0 MB in the beginning and 18.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 7.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 68755.46 ms. Allocated memory was 43.5 MB in the beginning and 46.7 MB in the end (delta: 3.1 MB). Free memory was 18.2 MB in the beginning and 15.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 6.1 MB. Max. memory is 14.3 GB. * Witness Printer took 4.69 ms. Allocated memory is still 46.7 MB. Free memory was 15.2 MB in the beginning and 14.9 MB in the end (delta: 353.0 kB). Peak memory consumption was 353.0 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L15] float pi = 3.14159 ; [L21] float x = __VERIFIER_nondet_float() ; [L22] float octant1 = 0 ; [L23] float octant2 = pi/8 ; [L11] COND FALSE !(!cond) [L25] float oddExp = x ; [L26] float evenExp = 1.0 ; [L27] float term = x ; [L28] unsigned int count = 2 ; [L29] int multFactor = 0 ; [L30] int temp ; [L32] COND TRUE 1 [L34] term = term * (x/count) [L35] EXPR (count>>1 % 2 == 0) ? 1 : -1 [L35] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L37] evenExp = evenExp + multFactor*term [L39] count++ [L41] term = term * (x/count) [L43] oddExp = oddExp + multFactor*term [L45] count++ [L47] temp = __VERIFIER_nondet_int() [L48] COND TRUE temp == 0 [L13] COND TRUE !(cond) [L8] __assert_fail("0", "loop3.c", 8, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 68.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 2 SDslu, 7 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 438 SizeOfPredicates, 1 NumberOfNonLiveVariables, 87 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...