./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/nla-digbench-scaling/freire1_valuebound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bff053df41c1fc922299a13f2dac2a98df2d05e146d51bf11ac9e37ddfefad6a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:37:44,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:37:44,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:37:44,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:37:44,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:37:44,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:37:44,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:37:44,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:37:44,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:37:44,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:37:44,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:37:44,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:37:44,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:37:44,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:37:44,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:37:44,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:37:44,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:37:44,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:37:44,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:37:44,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:37:44,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:37:44,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:37:44,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:37:44,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:37:44,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:37:44,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:37:44,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:37:44,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:37:44,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:37:44,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:37:44,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:37:44,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:37:44,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:37:44,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:37:44,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:37:44,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:37:44,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:37:44,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:37:44,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:37:44,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:37:44,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:37:44,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:37:44,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:37:44,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:37:44,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:37:44,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:37:44,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:37:44,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:37:44,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:37:44,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:37:44,613 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:37:44,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:37:44,614 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:37:44,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:37:44,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:37:44,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:37:44,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:37:44,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:37:44,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:37:44,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:37:44,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:37:44,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:37:44,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:37:44,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:37:44,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:37:44,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:37:44,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:37:44,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:37:44,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:37:44,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:37:44,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:37:44,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:37:44,617 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:37:44,618 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:37:44,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:37:44,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:37:44,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff053df41c1fc922299a13f2dac2a98df2d05e146d51bf11ac9e37ddfefad6a [2021-12-21 12:37:44,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:37:44,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:37:44,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:37:44,820 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:37:44,820 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:37:44,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c [2021-12-21 12:37:44,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81dbb8a87/dd006921169246258e1a621d8d29f2d4/FLAGf48415215 [2021-12-21 12:37:45,213 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:37:45,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c [2021-12-21 12:37:45,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81dbb8a87/dd006921169246258e1a621d8d29f2d4/FLAGf48415215 [2021-12-21 12:37:45,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81dbb8a87/dd006921169246258e1a621d8d29f2d4 [2021-12-21 12:37:45,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:37:45,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:37:45,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:37:45,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:37:45,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:37:45,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6093a922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45, skipping insertion in model container [2021-12-21 12:37:45,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:37:45,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:37:45,407 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c[712,725] [2021-12-21 12:37:45,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:37:45,440 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:37:45,449 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c[712,725] [2021-12-21 12:37:45,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:37:45,461 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:37:45,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45 WrapperNode [2021-12-21 12:37:45,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:37:45,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:37:45,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:37:45,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:37:45,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,483 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2021-12-21 12:37:45,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:37:45,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:37:45,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:37:45,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:37:45,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:37:45,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:37:45,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:37:45,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:37:45,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (1/1) ... [2021-12-21 12:37:45,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:37:45,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:37:45,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:37:45,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:37:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:37:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:37:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:37:45,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:37:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:37:45,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:37:45,584 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:37:45,586 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:37:45,654 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:37:45,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:37:45,658 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:37:45,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:37:45 BoogieIcfgContainer [2021-12-21 12:37:45,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:37:45,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:37:45,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:37:45,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:37:45,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:37:45" (1/3) ... [2021-12-21 12:37:45,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dec1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:37:45, skipping insertion in model container [2021-12-21 12:37:45,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:45" (2/3) ... [2021-12-21 12:37:45,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dec1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:37:45, skipping insertion in model container [2021-12-21 12:37:45,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:37:45" (3/3) ... [2021-12-21 12:37:45,665 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_valuebound20.c [2021-12-21 12:37:45,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:37:45,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:37:45,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:37:45,702 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:37:45,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:37:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:37:45,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 12:37:45,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:37:45,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:37:45,717 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:37:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:37:45,722 INFO L85 PathProgramCache]: Analyzing trace with hash -589467074, now seen corresponding path program 1 times [2021-12-21 12:37:45,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:37:45,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181839496] [2021-12-21 12:37:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:37:45,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:37:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:37:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:37:45,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:37:45,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181839496] [2021-12-21 12:37:45,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181839496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:37:45,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:37:45,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:37:45,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028461267] [2021-12-21 12:37:45,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:37:45,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:37:45,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:37:45,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:37:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:37:45,867 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:37:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:37:45,882 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-12-21 12:37:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:37:45,884 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 12:37:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:37:45,890 INFO L225 Difference]: With dead ends: 33 [2021-12-21 12:37:45,890 INFO L226 Difference]: Without dead ends: 14 [2021-12-21 12:37:45,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:37:45,897 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:37:45,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:37:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-21 12:37:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-21 12:37:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:37:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-12-21 12:37:45,924 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-12-21 12:37:45,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:37:45,924 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-12-21 12:37:45,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:37:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-12-21 12:37:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 12:37:45,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:37:45,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:37:45,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:37:45,927 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:37:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:37:45,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1187327748, now seen corresponding path program 1 times [2021-12-21 12:37:45,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:37:45,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109481593] [2021-12-21 12:37:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:37:45,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:37:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:37:45,963 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 12:37:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:37:45,993 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 12:37:45,993 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 12:37:45,994 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:37:45,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:37:45,998 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-21 12:37:46,000 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:37:46,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:37:46 BoogieIcfgContainer [2021-12-21 12:37:46,021 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:37:46,021 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:37:46,022 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:37:46,022 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:37:46,023 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:37:45" (3/4) ... [2021-12-21 12:37:46,026 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 12:37:46,026 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:37:46,027 INFO L158 Benchmark]: Toolchain (without parser) took 794.74ms. Allocated memory is still 127.9MB. Free memory was 96.6MB in the beginning and 67.4MB in the end (delta: 29.3MB). Peak memory consumption was 26.6MB. Max. memory is 16.1GB. [2021-12-21 12:37:46,028 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 77.6MB. Free memory is still 38.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:37:46,029 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.20ms. Allocated memory is still 127.9MB. Free memory was 96.3MB in the beginning and 103.3MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:37:46,030 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.38ms. Allocated memory is still 127.9MB. Free memory was 103.3MB in the beginning and 101.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:37:46,031 INFO L158 Benchmark]: Boogie Preprocessor took 16.33ms. Allocated memory is still 127.9MB. Free memory was 101.7MB in the beginning and 100.9MB in the end (delta: 789.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:37:46,033 INFO L158 Benchmark]: RCFGBuilder took 159.21ms. Allocated memory is still 127.9MB. Free memory was 100.8MB in the beginning and 91.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:37:46,033 INFO L158 Benchmark]: TraceAbstraction took 360.17ms. Allocated memory is still 127.9MB. Free memory was 91.2MB in the beginning and 67.8MB in the end (delta: 23.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-21 12:37:46,034 INFO L158 Benchmark]: Witness Printer took 4.95ms. Allocated memory is still 127.9MB. Free memory was 67.8MB in the beginning and 67.4MB in the end (delta: 390.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:37:46,038 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 77.6MB. Free memory is still 38.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.20ms. Allocated memory is still 127.9MB. Free memory was 96.3MB in the beginning and 103.3MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.38ms. Allocated memory is still 127.9MB. Free memory was 103.3MB in the beginning and 101.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.33ms. Allocated memory is still 127.9MB. Free memory was 101.7MB in the beginning and 100.9MB in the end (delta: 789.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 159.21ms. Allocated memory is still 127.9MB. Free memory was 100.8MB in the beginning and 91.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 360.17ms. Allocated memory is still 127.9MB. Free memory was 91.2MB in the beginning and 67.8MB in the end (delta: 23.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 4.95ms. Allocated memory is still 127.9MB. Free memory was 67.8MB in the beginning and 67.4MB in the end (delta: 390.3kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryDOUBLEComparisonOperation at line 28, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(a>=0 && a<=20) [L14] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L28] RET assume_abort_if_not(a>=0 && a<=20) [L29] x = a / 2.0 [L30] r = 0 VAL [r=0] [L32] COND TRUE 1 VAL [r=0] [L33] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 19 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 19 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-21 12:37:46,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/nla-digbench-scaling/freire1_valuebound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bff053df41c1fc922299a13f2dac2a98df2d05e146d51bf11ac9e37ddfefad6a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:37:47,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:37:47,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:37:47,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:37:47,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:37:47,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:37:47,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:37:47,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:37:47,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:37:47,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:37:47,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:37:47,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:37:47,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:37:47,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:37:47,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:37:47,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:37:47,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:37:47,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:37:47,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:37:47,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:37:47,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:37:47,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:37:47,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:37:47,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:37:47,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:37:47,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:37:47,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:37:47,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:37:47,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:37:47,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:37:47,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:37:47,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:37:47,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:37:47,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:37:47,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:37:47,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:37:47,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:37:47,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:37:47,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:37:47,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:37:47,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:37:47,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 12:37:47,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:37:47,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:37:47,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:37:47,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:37:47,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:37:47,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:37:47,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:37:47,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:37:47,936 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:37:47,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:37:47,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:37:47,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:37:47,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:37:47,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:37:47,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:37:47,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:37:47,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 12:37:47,938 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 12:37:47,938 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 12:37:47,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:37:47,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:37:47,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:37:47,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:37:47,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:37:47,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:37:47,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:37:47,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:37:47,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:37:47,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:37:47,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:37:47,940 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 12:37:47,940 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 12:37:47,940 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:37:47,941 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:37:47,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:37:47,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:37:47,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 12:37:47,941 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff053df41c1fc922299a13f2dac2a98df2d05e146d51bf11ac9e37ddfefad6a [2021-12-21 12:37:48,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:37:48,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:37:48,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:37:48,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:37:48,214 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:37:48,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c [2021-12-21 12:37:48,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3b8fe0f9/2590b60122c24d57af3949d301921a05/FLAG6ae4617d1 [2021-12-21 12:37:48,625 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:37:48,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c [2021-12-21 12:37:48,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3b8fe0f9/2590b60122c24d57af3949d301921a05/FLAG6ae4617d1 [2021-12-21 12:37:48,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3b8fe0f9/2590b60122c24d57af3949d301921a05 [2021-12-21 12:37:48,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:37:48,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:37:48,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:37:48,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:37:48,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:37:48,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed32eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48, skipping insertion in model container [2021-12-21 12:37:48,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:37:48,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:37:48,751 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c[712,725] [2021-12-21 12:37:48,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:37:48,773 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:37:48,781 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c[712,725] [2021-12-21 12:37:48,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:37:48,820 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:37:48,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48 WrapperNode [2021-12-21 12:37:48,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:37:48,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:37:48,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:37:48,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:37:48,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,841 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-21 12:37:48,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:37:48,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:37:48,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:37:48,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:37:48,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:37:48,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:37:48,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:37:48,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:37:48,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (1/1) ... [2021-12-21 12:37:48,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:37:48,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:37:48,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:37:48,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:37:48,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:37:48,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 12:37:48,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:37:48,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:37:48,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:37:48,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:37:48,991 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:37:48,992 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:37:49,850 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:37:49,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:37:49,855 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:37:49,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:37:49 BoogieIcfgContainer [2021-12-21 12:37:49,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:37:49,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:37:49,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:37:49,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:37:49,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:37:48" (1/3) ... [2021-12-21 12:37:49,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68358101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:37:49, skipping insertion in model container [2021-12-21 12:37:49,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:37:48" (2/3) ... [2021-12-21 12:37:49,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68358101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:37:49, skipping insertion in model container [2021-12-21 12:37:49,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:37:49" (3/3) ... [2021-12-21 12:37:49,863 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_valuebound20.c [2021-12-21 12:37:49,869 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:37:49,870 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:37:49,913 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:37:49,921 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:37:49,921 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:37:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:37:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 12:37:49,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:37:49,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:37:49,957 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:37:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:37:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash -589467074, now seen corresponding path program 1 times [2021-12-21 12:37:49,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:37:49,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722852667] [2021-12-21 12:37:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:37:49,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:37:49,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:37:49,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 12:37:49,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 12:37:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:37:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 12:37:50,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:37:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:37:50,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:37:50,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:37:50,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722852667] [2021-12-21 12:37:50,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722852667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:37:50,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:37:50,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:37:50,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450770473] [2021-12-21 12:37:50,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:37:50,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:37:50,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:37:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:37:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:37:50,345 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:37:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:37:50,357 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-12-21 12:37:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:37:50,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 12:37:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:37:50,362 INFO L225 Difference]: With dead ends: 33 [2021-12-21 12:37:50,363 INFO L226 Difference]: Without dead ends: 14 [2021-12-21 12:37:50,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:37:50,367 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:37:50,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:37:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-21 12:37:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-21 12:37:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:37:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-12-21 12:37:50,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-12-21 12:37:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:37:50,400 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-12-21 12:37:50,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:37:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-12-21 12:37:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 12:37:50,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:37:50,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:37:50,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:37:50,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:37:50,611 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:37:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:37:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1187327748, now seen corresponding path program 1 times [2021-12-21 12:37:50,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:37:50,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444840798] [2021-12-21 12:37:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:37:50,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:37:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:37:50,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 12:37:50,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 12:37:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:37:51,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 12:37:51,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:38:03,961 WARN L227 SmtUtils]: Spent 6.36s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-21 12:38:45,639 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (and (let ((.cse0 (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1|) .cse1) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) (or (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| (_ bv0 32))) (and .cse0 (= |c___VERIFIER_assert_#in~cond| (_ bv1 32))))) (fp.geq |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| .cse1) (fp.leq |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| ((_ to_fp 11 53) roundNearestTiesToEven (_ bv20 32)))))) is different from true