./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8bd4bc60 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -ea -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-acceleration/underapprox_2-2.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 .............................................................................................................................................................................................................................................. 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 -Xmx12G -Xms1G -ea -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-acceleration/underapprox_2-2.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-8bd4bc6 [2020-07-28 18:14:34,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-28 18:14:34,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-28 18:14:34,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-28 18:14:34,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-28 18:14:34,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-28 18:14:34,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-28 18:14:34,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-28 18:14:34,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-28 18:14:34,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-28 18:14:34,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-28 18:14:34,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-28 18:14:34,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-28 18:14:34,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-28 18:14:34,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-28 18:14:34,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-28 18:14:34,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-28 18:14:34,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-28 18:14:34,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-28 18:14:34,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-28 18:14:34,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-28 18:14:34,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-28 18:14:34,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-28 18:14:34,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-28 18:14:34,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-28 18:14:34,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-28 18:14:34,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-28 18:14:34,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-28 18:14:34,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-28 18:14:34,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-28 18:14:34,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 18:14:34,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 18:14:34,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 18:14:34,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 18:14:34,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 18:14:34,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 18:14:34,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 18:14:34,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 18:14:34,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 18:14:34,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 18:14:34,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 18:14:34,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-28 18:14:34,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 18:14:34,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 18:14:34,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 18:14:34,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 18:14:34,239 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 18:14:34,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 18:14:34,240 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 18:14:34,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-28 18:14:34,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 18:14:34,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 18:14:34,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 18:14:34,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 18:14:34,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 18:14:34,242 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 18:14:34,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 18:14:34,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 18:14:34,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 18:14:34,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 18:14:34,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 18:14:34,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 18:14:34,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 18:14:34,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 18:14:34,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 18:14:34,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 18:14:34,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 18:14:34,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-28 18:14:34,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-28 18:14:34,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 18:14:34,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 18:14:34,246 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(__VERIFIER_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 -> 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 [2020-07-28 18:14:34,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 18:14:34,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 18:14:34,564 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 18:14:34,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 18:14:34,568 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 18:14:34,570 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2020-07-28 18:14:34,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260312d30/0239ca1799e44b709e942b45e580d1bf/FLAG38012b668 [2020-07-28 18:14:35,088 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 18:14:35,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2020-07-28 18:14:35,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260312d30/0239ca1799e44b709e942b45e580d1bf/FLAG38012b668 [2020-07-28 18:14:35,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260312d30/0239ca1799e44b709e942b45e580d1bf [2020-07-28 18:14:35,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 18:14:35,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 18:14:35,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 18:14:35,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 18:14:35,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 18:14:35,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e8d2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35, skipping insertion in model container [2020-07-28 18:14:35,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 18:14:35,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 18:14:35,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:14:35,725 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 18:14:35,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:14:35,753 INFO L208 MainTranslator]: Completed translation [2020-07-28 18:14:35,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35 WrapperNode [2020-07-28 18:14:35,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 18:14:35,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 18:14:35,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 18:14:35,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 18:14:35,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 18:14:35,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 18:14:35,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 18:14:35,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 18:14:35,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (1/1) ... [2020-07-28 18:14:35,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 18:14:35,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 18:14:35,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 18:14:35,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 18:14:35,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (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 [2020-07-28 18:14:35,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 18:14:35,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 18:14:36,138 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 18:14:36,139 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-28 18:14:36,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:14:36 BoogieIcfgContainer [2020-07-28 18:14:36,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 18:14:36,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 18:14:36,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 18:14:36,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 18:14:36,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 06:14:35" (1/3) ... [2020-07-28 18:14:36,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f8ca92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:14:36, skipping insertion in model container [2020-07-28 18:14:36,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:35" (2/3) ... [2020-07-28 18:14:36,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f8ca92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:14:36, skipping insertion in model container [2020-07-28 18:14:36,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:14:36" (3/3) ... [2020-07-28 18:14:36,152 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-07-28 18:14:36,166 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 18:14:36,174 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-28 18:14:36,190 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-28 18:14:36,224 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 18:14:36,227 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 18:14:36,228 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 18:14:36,228 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 18:14:36,229 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 18:14:36,230 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 18:14:36,230 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 18:14:36,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 18:14:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-07-28 18:14:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-28 18:14:36,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:14:36,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-28 18:14:36,290 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:14:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:14:36,303 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2020-07-28 18:14:36,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 18:14:36,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511214360] [2020-07-28 18:14:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 18:14:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:14:36,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-28 18:14:36,434 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.proof.FixResolutionProof.fix(FixResolutionProof.java:191) at de.uni_freiburg.informatik.ultimate.smtinterpol.proof.ProofTermGenerator.convert(ProofTermGenerator.java:150) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getProof(SMTInterpol.java:797) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-28 18:14:36,447 INFO L168 Benchmark]: Toolchain (without parser) took 970.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 960.2 MB in the beginning and 1.1 GB in the end (delta: -143.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:14:36,448 INFO L168 Benchmark]: CDTParser took 0.95 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:14:36,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.36 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-07-28 18:14:36,453 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -187.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-07-28 18:14:36,455 INFO L168 Benchmark]: Boogie Preprocessor took 19.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:14:36,456 INFO L168 Benchmark]: RCFGBuilder took 272.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2020-07-28 18:14:36,458 INFO L168 Benchmark]: TraceAbstraction took 296.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2020-07-28 18:14:36,468 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.95 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 279.36 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 94.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -187.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 272.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 296.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.proof.FixResolutionProof.fix(FixResolutionProof.java:191) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-8bd4bc6 [2020-07-28 18:14:38,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-28 18:14:38,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-28 18:14:38,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-28 18:14:38,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-28 18:14:38,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-28 18:14:38,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-28 18:14:38,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-28 18:14:38,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-28 18:14:38,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-28 18:14:38,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-28 18:14:38,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-28 18:14:38,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-28 18:14:38,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-28 18:14:38,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-28 18:14:38,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-28 18:14:38,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-28 18:14:38,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-28 18:14:38,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-28 18:14:38,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-28 18:14:38,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-28 18:14:38,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-28 18:14:38,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-28 18:14:38,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-28 18:14:38,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-28 18:14:38,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-28 18:14:38,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-28 18:14:38,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-28 18:14:38,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-28 18:14:38,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-28 18:14:38,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 18:14:38,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 18:14:38,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 18:14:38,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 18:14:38,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 18:14:38,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 18:14:38,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 18:14:38,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 18:14:38,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 18:14:38,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 18:14:38,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 18:14:38,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-07-28 18:14:38,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 18:14:38,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 18:14:38,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 18:14:38,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 18:14:38,611 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 18:14:38,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 18:14:38,612 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 18:14:38,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 18:14:38,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 18:14:38,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 18:14:38,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 18:14:38,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 18:14:38,614 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-07-28 18:14:38,614 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-07-28 18:14:38,614 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 18:14:38,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 18:14:38,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 18:14:38,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 18:14:38,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 18:14:38,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 18:14:38,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 18:14:38,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 18:14:38,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 18:14:38,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 18:14:38,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 18:14:38,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 18:14:38,618 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-07-28 18:14:38,618 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-07-28 18:14:38,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 18:14:38,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 18:14:38,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-28 18:14:38,619 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(__VERIFIER_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 -> 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 [2020-07-28 18:14:38,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 18:14:38,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 18:14:38,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 18:14:38,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 18:14:38,972 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 18:14:38,973 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2020-07-28 18:14:39,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d22bcc5f/7ebcaf01183e4448b71404980ba4f784/FLAG17f1d901d [2020-07-28 18:14:39,550 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 18:14:39,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2020-07-28 18:14:39,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d22bcc5f/7ebcaf01183e4448b71404980ba4f784/FLAG17f1d901d [2020-07-28 18:14:39,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d22bcc5f/7ebcaf01183e4448b71404980ba4f784 [2020-07-28 18:14:39,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 18:14:39,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 18:14:39,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 18:14:39,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 18:14:39,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 18:14:39,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:14:39" (1/1) ... [2020-07-28 18:14:39,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c84af99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:39, skipping insertion in model container [2020-07-28 18:14:39,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:14:39" (1/1) ... [2020-07-28 18:14:40,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 18:14:40,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 18:14:40,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:14:40,224 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 18:14:40,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:14:40,255 INFO L208 MainTranslator]: Completed translation [2020-07-28 18:14:40,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40 WrapperNode [2020-07-28 18:14:40,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 18:14:40,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 18:14:40,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 18:14:40,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 18:14:40,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (1/1) ... [2020-07-28 18:14:40,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (1/1) ... [2020-07-28 18:14:40,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 18:14:40,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 18:14:40,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 18:14:40,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 18:14:40,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (1/1) ... [2020-07-28 18:14:40,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (1/1) ... [2020-07-28 18:14:40,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (1/1) ... [2020-07-28 18:14:40,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (1/1) ... [2020-07-28 18:14:40,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (1/1) ... [2020-07-28 18:14:40,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (1/1) ... [2020-07-28 18:14:40,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (1/1) ... [2020-07-28 18:14:40,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 18:14:40,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 18:14:40,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 18:14:40,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 18:14:40,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (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 [2020-07-28 18:14:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 18:14:40,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 18:14:40,634 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 18:14:40,635 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-28 18:14:40,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:14:40 BoogieIcfgContainer [2020-07-28 18:14:40,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 18:14:40,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 18:14:40,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 18:14:40,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 18:14:40,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 06:14:39" (1/3) ... [2020-07-28 18:14:40,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d39fd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:14:40, skipping insertion in model container [2020-07-28 18:14:40,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:14:40" (2/3) ... [2020-07-28 18:14:40,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d39fd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:14:40, skipping insertion in model container [2020-07-28 18:14:40,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:14:40" (3/3) ... [2020-07-28 18:14:40,647 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-07-28 18:14:40,658 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 18:14:40,665 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-28 18:14:40,680 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-28 18:14:40,700 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 18:14:40,701 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 18:14:40,701 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 18:14:40,701 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 18:14:40,701 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 18:14:40,701 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 18:14:40,702 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 18:14:40,702 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 18:14:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-07-28 18:14:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-28 18:14:40,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:14:40,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-28 18:14:40,722 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:14:40,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:14:40,727 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2020-07-28 18:14:40,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-07-28 18:14:40,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742516199] [2020-07-28 18:14:40,739 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 [2020-07-28 18:14:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:14:40,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-28 18:14:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:14:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-28 18:14:40,893 INFO L280 TraceCheckUtils]: 0: Hoare triple {12#true} havoc main_#res;havoc main_#t~post0, main_~x~0, main_~y~0;main_~x~0 := 0bv32;main_~y~0 := 1bv32; {17#(= (_ bv0 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:40,897 INFO L280 TraceCheckUtils]: 1: Hoare triple {17#(= (_ bv0 32) ULTIMATE.start_main_~x~0)} assume !~bvult32(main_~x~0, 6bv32); {13#false} is VALID [2020-07-28 18:14:40,898 INFO L280 TraceCheckUtils]: 2: Hoare triple {13#false} __VERIFIER_assert_#in~cond := (if 6bv32 == main_~x~0 then 1bv32 else 0bv32);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {13#false} is VALID [2020-07-28 18:14:40,898 INFO L280 TraceCheckUtils]: 3: Hoare triple {13#false} assume 0bv32 == __VERIFIER_assert_~cond; {13#false} is VALID [2020-07-28 18:14:40,898 INFO L280 TraceCheckUtils]: 4: Hoare triple {13#false} assume !false; {13#false} is VALID [2020-07-28 18:14:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:14:40,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-28 18:14:40,933 INFO L280 TraceCheckUtils]: 4: Hoare triple {13#false} assume !false; {13#false} is VALID [2020-07-28 18:14:40,934 INFO L280 TraceCheckUtils]: 3: Hoare triple {13#false} assume 0bv32 == __VERIFIER_assert_~cond; {13#false} is VALID [2020-07-28 18:14:40,934 INFO L280 TraceCheckUtils]: 2: Hoare triple {13#false} __VERIFIER_assert_#in~cond := (if 6bv32 == main_~x~0 then 1bv32 else 0bv32);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {13#false} is VALID [2020-07-28 18:14:40,935 INFO L280 TraceCheckUtils]: 1: Hoare triple {39#(bvult ULTIMATE.start_main_~x~0 (_ bv6 32))} assume !~bvult32(main_~x~0, 6bv32); {13#false} is VALID [2020-07-28 18:14:40,937 INFO L280 TraceCheckUtils]: 0: Hoare triple {12#true} havoc main_#res;havoc main_#t~post0, main_~x~0, main_~y~0;main_~x~0 := 0bv32;main_~y~0 := 1bv32; {39#(bvult ULTIMATE.start_main_~x~0 (_ bv6 32))} is VALID [2020-07-28 18:14:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:14:40,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742516199] [2020-07-28 18:14:40,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-07-28 18:14:40,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-07-28 18:14:40,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702717033] [2020-07-28 18:14:40,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-07-28 18:14:40,948 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 18:14:40,952 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2020-07-28 18:14:40,970 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 7 edges. 7 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:14:40,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-28 18:14:40,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-07-28 18:14:40,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-28 18:14:40,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-28 18:14:40,983 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2020-07-28 18:14:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:14:41,075 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2020-07-28 18:14:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-28 18:14:41,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-07-28 18:14:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 18:14:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-28 18:14:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 24 transitions. [2020-07-28 18:14:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-28 18:14:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 24 transitions. [2020-07-28 18:14:41,085 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 24 transitions. [2020-07-28 18:14:41,132 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:14:41,142 INFO L225 Difference]: With dead ends: 18 [2020-07-28 18:14:41,142 INFO L226 Difference]: Without dead ends: 8 [2020-07-28 18:14:41,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-28 18:14:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-07-28 18:14:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-07-28 18:14:41,182 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 18:14:41,183 INFO L82 GeneralOperation]: Start isEquivalent. First operand 8 states. Second operand 8 states. [2020-07-28 18:14:41,183 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2020-07-28 18:14:41,184 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2020-07-28 18:14:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:14:41,185 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2020-07-28 18:14:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-07-28 18:14:41,186 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:14:41,186 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:14:41,186 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2020-07-28 18:14:41,186 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2020-07-28 18:14:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:14:41,188 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2020-07-28 18:14:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-07-28 18:14:41,188 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:14:41,188 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:14:41,188 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 18:14:41,189 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 18:14:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-28 18:14:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-07-28 18:14:41,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2020-07-28 18:14:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 18:14:41,192 INFO L479 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-07-28 18:14:41,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-28 18:14:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-07-28 18:14:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-07-28 18:14:41,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:14:41,193 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-07-28 18:14:41,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-07-28 18:14:41,404 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:14:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:14:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 1 times [2020-07-28 18:14:41,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-07-28 18:14:41,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697506962] [2020-07-28 18:14:41,407 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) [2020-07-28 18:14:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:14:41,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-07-28 18:14:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:14:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-28 18:14:41,502 INFO L280 TraceCheckUtils]: 0: Hoare triple {92#true} havoc main_#res;havoc main_#t~post0, main_~x~0, main_~y~0;main_~x~0 := 0bv32;main_~y~0 := 1bv32; {97#(= (_ bv0 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:41,503 INFO L280 TraceCheckUtils]: 1: Hoare triple {97#(= (_ bv0 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {101#(= (_ bv1 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:41,504 INFO L280 TraceCheckUtils]: 2: Hoare triple {101#(= (_ bv1 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {105#(= (_ bv2 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:41,506 INFO L280 TraceCheckUtils]: 3: Hoare triple {105#(= (_ bv2 32) ULTIMATE.start_main_~x~0)} assume !~bvult32(main_~x~0, 6bv32); {93#false} is VALID [2020-07-28 18:14:41,506 INFO L280 TraceCheckUtils]: 4: Hoare triple {93#false} __VERIFIER_assert_#in~cond := (if 6bv32 == main_~x~0 then 1bv32 else 0bv32);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {93#false} is VALID [2020-07-28 18:14:41,506 INFO L280 TraceCheckUtils]: 5: Hoare triple {93#false} assume 0bv32 == __VERIFIER_assert_~cond; {93#false} is VALID [2020-07-28 18:14:41,507 INFO L280 TraceCheckUtils]: 6: Hoare triple {93#false} assume !false; {93#false} is VALID [2020-07-28 18:14:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:14:41,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-28 18:14:41,591 INFO L280 TraceCheckUtils]: 6: Hoare triple {93#false} assume !false; {93#false} is VALID [2020-07-28 18:14:41,591 INFO L280 TraceCheckUtils]: 5: Hoare triple {93#false} assume 0bv32 == __VERIFIER_assert_~cond; {93#false} is VALID [2020-07-28 18:14:41,592 INFO L280 TraceCheckUtils]: 4: Hoare triple {93#false} __VERIFIER_assert_#in~cond := (if 6bv32 == main_~x~0 then 1bv32 else 0bv32);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {93#false} is VALID [2020-07-28 18:14:41,592 INFO L280 TraceCheckUtils]: 3: Hoare triple {127#(bvult ULTIMATE.start_main_~x~0 (_ bv6 32))} assume !~bvult32(main_~x~0, 6bv32); {93#false} is VALID [2020-07-28 18:14:41,594 INFO L280 TraceCheckUtils]: 2: Hoare triple {131#(bvult (bvadd ULTIMATE.start_main_~x~0 (_ bv1 32)) (_ bv6 32))} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {127#(bvult ULTIMATE.start_main_~x~0 (_ bv6 32))} is VALID [2020-07-28 18:14:41,598 INFO L280 TraceCheckUtils]: 1: Hoare triple {135#(bvult (bvadd ULTIMATE.start_main_~x~0 (_ bv2 32)) (_ bv6 32))} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {131#(bvult (bvadd ULTIMATE.start_main_~x~0 (_ bv1 32)) (_ bv6 32))} is VALID [2020-07-28 18:14:41,600 INFO L280 TraceCheckUtils]: 0: Hoare triple {92#true} havoc main_#res;havoc main_#t~post0, main_~x~0, main_~y~0;main_~x~0 := 0bv32;main_~y~0 := 1bv32; {135#(bvult (bvadd ULTIMATE.start_main_~x~0 (_ bv2 32)) (_ bv6 32))} is VALID [2020-07-28 18:14:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:14:41,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697506962] [2020-07-28 18:14:41,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-28 18:14:41,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-07-28 18:14:41,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506969370] [2020-07-28 18:14:41,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2020-07-28 18:14:41,604 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 18:14:41,604 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2020-07-28 18:14:41,627 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:14:41,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-28 18:14:41,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-07-28 18:14:41,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-28 18:14:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-28 18:14:41,629 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2020-07-28 18:14:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:14:41,901 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2020-07-28 18:14:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-28 18:14:41,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2020-07-28 18:14:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 18:14:41,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-28 18:14:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 19 transitions. [2020-07-28 18:14:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-28 18:14:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 19 transitions. [2020-07-28 18:14:41,908 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states and 19 transitions. [2020-07-28 18:14:41,955 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:14:41,957 INFO L225 Difference]: With dead ends: 16 [2020-07-28 18:14:41,957 INFO L226 Difference]: Without dead ends: 12 [2020-07-28 18:14:41,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-28 18:14:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-28 18:14:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-28 18:14:41,971 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 18:14:41,972 INFO L82 GeneralOperation]: Start isEquivalent. First operand 12 states. Second operand 12 states. [2020-07-28 18:14:41,972 INFO L74 IsIncluded]: Start isIncluded. First operand 12 states. Second operand 12 states. [2020-07-28 18:14:41,972 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 12 states. [2020-07-28 18:14:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:14:41,974 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-07-28 18:14:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-28 18:14:41,974 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:14:41,975 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:14:41,975 INFO L74 IsIncluded]: Start isIncluded. First operand 12 states. Second operand 12 states. [2020-07-28 18:14:41,975 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 12 states. [2020-07-28 18:14:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:14:41,977 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-07-28 18:14:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-28 18:14:41,977 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:14:41,978 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:14:41,978 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 18:14:41,978 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 18:14:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-28 18:14:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-28 18:14:41,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2020-07-28 18:14:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 18:14:41,980 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-28 18:14:41,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-28 18:14:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-28 18:14:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-28 18:14:41,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:14:41,981 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2020-07-28 18:14:42,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-07-28 18:14:42,200 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:14:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:14:42,200 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 2 times [2020-07-28 18:14:42,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-07-28 18:14:42,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111638352] [2020-07-28 18:14:42,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-28 18:14:42,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-28 18:14:42,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-28 18:14:42,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-28 18:14:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:14:42,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-28 18:14:42,392 INFO L280 TraceCheckUtils]: 0: Hoare triple {208#true} havoc main_#res;havoc main_#t~post0, main_~x~0, main_~y~0;main_~x~0 := 0bv32;main_~y~0 := 1bv32; {213#(= (_ bv0 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,394 INFO L280 TraceCheckUtils]: 1: Hoare triple {213#(= (_ bv0 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {217#(= (_ bv1 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,395 INFO L280 TraceCheckUtils]: 2: Hoare triple {217#(= (_ bv1 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {221#(= (_ bv2 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,396 INFO L280 TraceCheckUtils]: 3: Hoare triple {221#(= (_ bv2 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {225#(= (_ bv3 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,397 INFO L280 TraceCheckUtils]: 4: Hoare triple {225#(= (_ bv3 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {229#(= (_ bv4 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,398 INFO L280 TraceCheckUtils]: 5: Hoare triple {229#(= (_ bv4 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {233#(= (_ bv5 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,399 INFO L280 TraceCheckUtils]: 6: Hoare triple {233#(= (_ bv5 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {237#(= (_ bv6 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,400 INFO L280 TraceCheckUtils]: 7: Hoare triple {237#(= (_ bv6 32) ULTIMATE.start_main_~x~0)} assume !~bvult32(main_~x~0, 6bv32); {237#(= (_ bv6 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,401 INFO L280 TraceCheckUtils]: 8: Hoare triple {237#(= (_ bv6 32) ULTIMATE.start_main_~x~0)} __VERIFIER_assert_#in~cond := (if 6bv32 == main_~x~0 then 1bv32 else 0bv32);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {244#(= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))} is VALID [2020-07-28 18:14:42,403 INFO L280 TraceCheckUtils]: 9: Hoare triple {244#(= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))} assume 0bv32 == __VERIFIER_assert_~cond; {209#false} is VALID [2020-07-28 18:14:42,403 INFO L280 TraceCheckUtils]: 10: Hoare triple {209#false} assume !false; {209#false} is VALID [2020-07-28 18:14:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:14:42,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-28 18:14:42,559 INFO L280 TraceCheckUtils]: 10: Hoare triple {209#false} assume !false; {209#false} is VALID [2020-07-28 18:14:42,560 INFO L280 TraceCheckUtils]: 9: Hoare triple {254#(not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))} assume 0bv32 == __VERIFIER_assert_~cond; {209#false} is VALID [2020-07-28 18:14:42,561 INFO L280 TraceCheckUtils]: 8: Hoare triple {237#(= (_ bv6 32) ULTIMATE.start_main_~x~0)} __VERIFIER_assert_#in~cond := (if 6bv32 == main_~x~0 then 1bv32 else 0bv32);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {254#(not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))} is VALID [2020-07-28 18:14:42,562 INFO L280 TraceCheckUtils]: 7: Hoare triple {237#(= (_ bv6 32) ULTIMATE.start_main_~x~0)} assume !~bvult32(main_~x~0, 6bv32); {237#(= (_ bv6 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,563 INFO L280 TraceCheckUtils]: 6: Hoare triple {233#(= (_ bv5 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {237#(= (_ bv6 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,564 INFO L280 TraceCheckUtils]: 5: Hoare triple {229#(= (_ bv4 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {233#(= (_ bv5 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,565 INFO L280 TraceCheckUtils]: 4: Hoare triple {225#(= (_ bv3 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {229#(= (_ bv4 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,566 INFO L280 TraceCheckUtils]: 3: Hoare triple {221#(= (_ bv2 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {225#(= (_ bv3 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,567 INFO L280 TraceCheckUtils]: 2: Hoare triple {217#(= (_ bv1 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {221#(= (_ bv2 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,568 INFO L280 TraceCheckUtils]: 1: Hoare triple {213#(= (_ bv0 32) ULTIMATE.start_main_~x~0)} assume !!~bvult32(main_~x~0, 6bv32);main_#t~post0 := main_~x~0;main_~x~0 := ~bvadd32(1bv32, main_#t~post0);havoc main_#t~post0;main_~y~0 := ~bvmul32(2bv32, main_~y~0); {217#(= (_ bv1 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,569 INFO L280 TraceCheckUtils]: 0: Hoare triple {208#true} havoc main_#res;havoc main_#t~post0, main_~x~0, main_~y~0;main_~x~0 := 0bv32;main_~y~0 := 1bv32; {213#(= (_ bv0 32) ULTIMATE.start_main_~x~0)} is VALID [2020-07-28 18:14:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:14:42,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111638352] [2020-07-28 18:14:42,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-28 18:14:42,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-28 18:14:42,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912382000] [2020-07-28 18:14:42,571 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-07-28 18:14:42,571 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 18:14:42,572 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 11 states. [2020-07-28 18:14:42,591 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 13 edges. 13 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:14:42,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-28 18:14:42,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-07-28 18:14:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-28 18:14:42,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-07-28 18:14:42,593 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2020-07-28 18:14:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:14:42,919 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-07-28 18:14:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-28 18:14:42,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-07-28 18:14:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 18:14:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-07-28 18:14:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 16 transitions. [2020-07-28 18:14:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-07-28 18:14:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 16 transitions. [2020-07-28 18:14:42,923 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 10 states and 16 transitions. [2020-07-28 18:14:42,955 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:14:42,955 INFO L225 Difference]: With dead ends: 15 [2020-07-28 18:14:42,955 INFO L226 Difference]: Without dead ends: 0 [2020-07-28 18:14:42,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-07-28 18:14:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-28 18:14:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-28 18:14:42,957 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 18:14:42,957 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2020-07-28 18:14:42,957 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2020-07-28 18:14:42,958 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2020-07-28 18:14:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:14:42,958 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-07-28 18:14:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-28 18:14:42,958 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:14:42,959 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:14:42,959 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2020-07-28 18:14:42,959 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2020-07-28 18:14:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:14:42,960 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-07-28 18:14:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-28 18:14:42,960 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:14:42,960 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:14:42,960 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 18:14:42,960 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 18:14:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-28 18:14:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-28 18:14:42,961 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-07-28 18:14:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 18:14:42,961 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-28 18:14:42,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-28 18:14:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-28 18:14:42,962 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:14:43,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-07-28 18:14:43,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-28 18:14:43,312 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-28 18:14:43,312 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-28 18:14:43,312 INFO L268 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-07-28 18:14:43,312 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-28 18:14:43,313 INFO L268 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-28 18:14:43,313 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (= (_ bv6 32) ULTIMATE.start_main_~x~0) (= (_ bv5 32) ULTIMATE.start_main_~x~0) (= (_ bv3 32) ULTIMATE.start_main_~x~0) (= (_ bv1 32) ULTIMATE.start_main_~x~0) (= (_ bv4 32) ULTIMATE.start_main_~x~0) (= (_ bv0 32) ULTIMATE.start_main_~x~0) (= (_ bv2 32) ULTIMATE.start_main_~x~0)) [2020-07-28 18:14:43,313 INFO L268 CegarLoopResult]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2020-07-28 18:14:43,313 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-28 18:14:43,314 INFO L271 CegarLoopResult]: At program point L4-2(lines 1 20) the Hoare annotation is: true [2020-07-28 18:14:43,318 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-28 18:14:43,318 WARN L170 areAnnotationChecker]: L14-3 has no Hoare annotation [2020-07-28 18:14:43,318 WARN L170 areAnnotationChecker]: L14-3 has no Hoare annotation [2020-07-28 18:14:43,321 WARN L170 areAnnotationChecker]: L14-3 has no Hoare annotation [2020-07-28 18:14:43,322 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-28 18:14:43,322 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-28 18:14:43,322 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-28 18:14:43,322 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-28 18:14:43,322 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 18:14:43,322 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 18:14:43,323 INFO L163 areAnnotationChecker]: CFG has 1 edges. 1 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-28 18:14:43,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.07 06:14:43 BoogieIcfgContainer [2020-07-28 18:14:43,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-28 18:14:43,334 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-28 18:14:43,334 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-28 18:14:43,334 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-28 18:14:43,335 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:14:40" (3/4) ... [2020-07-28 18:14:43,338 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-07-28 18:14:43,349 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-07-28 18:14:43,349 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-07-28 18:14:43,394 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-07-28 18:14:43,394 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-28 18:14:43,397 INFO L168 Benchmark]: Toolchain (without parser) took 3416.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 961.6 MB in the beginning and 935.7 MB in the end (delta: 25.9 MB). Peak memory consumption was 166.9 MB. Max. memory is 11.5 GB. [2020-07-28 18:14:43,398 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:14:43,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.80 ms. Allocated memory is still 1.0 GB. Free memory was 961.6 MB in the beginning and 950.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-07-28 18:14:43,399 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 950.8 MB in the beginning and 1.1 GB in the end (delta: -186.9 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2020-07-28 18:14:43,400 INFO L168 Benchmark]: Boogie Preprocessor took 20.97 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:14:43,404 INFO L168 Benchmark]: RCFGBuilder took 274.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2020-07-28 18:14:43,404 INFO L168 Benchmark]: TraceAbstraction took 2693.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 935.7 MB in the end (delta: 183.7 MB). Peak memory consumption was 183.7 MB. Max. memory is 11.5 GB. [2020-07-28 18:14:43,405 INFO L168 Benchmark]: Witness Printer took 60.49 ms. Allocated memory is still 1.2 GB. Free memory is still 935.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:14:43,413 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 271.80 ms. Allocated memory is still 1.0 GB. Free memory was 961.6 MB in the beginning and 950.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 85.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 950.8 MB in the beginning and 1.1 GB in the end (delta: -186.9 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.97 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 274.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2693.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 935.7 MB in the end (delta: 183.7 MB). Peak memory consumption was 183.7 MB. Max. memory is 11.5 GB. * Witness Printer took 60.49 ms. Allocated memory is still 1.2 GB. Free memory is still 935.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((6bv32 == x || 5bv32 == x) || 3bv32 == x) || 1bv32 == x) || 4bv32 == x) || 0bv32 == x) || 2bv32 == x - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 3, TraceHistogramMax: 6, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 1 SDslu, 20 SDs, 0 SdLazy, 106 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 23 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 26 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 806 SizeOfPredicates, 5 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...