/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/terminator_03-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:26:21,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:26:21,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:26:21,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:26:21,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:26:21,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:26:21,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:26:21,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:26:21,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:26:21,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:26:21,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:26:21,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:26:21,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:26:21,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:26:21,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:26:21,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:26:21,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:26:21,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:26:21,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:26:21,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:26:21,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:26:21,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:26:21,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:26:21,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:26:21,734 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:26:21,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:26:21,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:26:21,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:26:21,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:26:21,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:26:21,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:26:21,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:26:21,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:26:21,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:26:21,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:26:21,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:26:21,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:26:21,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:26:21,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:26:21,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:26:21,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:26:21,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:26:21,776 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:26:21,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:26:21,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:26:21,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:26:21,778 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:26:21,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:26:21,779 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:26:21,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:26:21,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:26:21,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:26:21,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:26:21,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:26:21,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:26:21,780 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:26:21,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:26:21,781 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:26:21,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:26:21,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:26:21,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:26:21,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:26:21,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:26:21,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:26:21,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:26:21,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:26:21,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:26:21,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:26:21,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:26:21,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:26:21,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:26:21,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-21 13:26:22,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:26:22,109 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:26:22,113 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:26:22,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:26:22,115 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:26:22,116 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-2.i [2020-08-21 13:26:22,185 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dae70895a/ae5227b7062a48c18a662f6ebe56dc10/FLAG81b7a3053 [2020-08-21 13:26:22,643 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:26:22,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/terminator_03-2.i [2020-08-21 13:26:22,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dae70895a/ae5227b7062a48c18a662f6ebe56dc10/FLAG81b7a3053 [2020-08-21 13:26:23,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dae70895a/ae5227b7062a48c18a662f6ebe56dc10 [2020-08-21 13:26:23,101 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:26:23,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:26:23,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:26:23,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:26:23,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:26:23,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:26:23" (1/1) ... [2020-08-21 13:26:23,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da42254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23, skipping insertion in model container [2020-08-21 13:26:23,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:26:23" (1/1) ... [2020-08-21 13:26:23,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:26:23,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:26:23,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:26:23,332 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:26:23,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:26:23,358 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:26:23,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23 WrapperNode [2020-08-21 13:26:23,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:26:23,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:26:23,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:26:23,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:26:23,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23" (1/1) ... [2020-08-21 13:26:23,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23" (1/1) ... [2020-08-21 13:26:23,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23" (1/1) ... [2020-08-21 13:26:23,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23" (1/1) ... [2020-08-21 13:26:23,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23" (1/1) ... [2020-08-21 13:26:23,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23" (1/1) ... [2020-08-21 13:26:23,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23" (1/1) ... [2020-08-21 13:26:23,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:26:23,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:26:23,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:26:23,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:26:23,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 13:26:23,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:26:23,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:26:23,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 13:26:23,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 13:26:23,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:26:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:26:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 13:26:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 13:26:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 13:26:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:26:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 13:26:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:26:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:26:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:26:23,707 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:26:23,708 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 13:26:23,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:26:23 BoogieIcfgContainer [2020-08-21 13:26:23,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:26:23,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:26:23,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:26:23,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:26:23,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:26:23" (1/3) ... [2020-08-21 13:26:23,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672154dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:26:23, skipping insertion in model container [2020-08-21 13:26:23,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:23" (2/3) ... [2020-08-21 13:26:23,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672154dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:26:23, skipping insertion in model container [2020-08-21 13:26:23,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:26:23" (3/3) ... [2020-08-21 13:26:23,721 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_03-2.i [2020-08-21 13:26:23,732 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:26:23,740 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:26:23,756 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:26:23,825 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:26:23,826 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:26:23,826 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:26:23,826 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:26:23,826 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:26:23,826 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:26:23,826 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:26:23,827 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:26:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 13:26:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 13:26:23,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:23,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:23,882 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:23,889 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-08-21 13:26:23,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:23,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954590806] [2020-08-21 13:26:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:24,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:24,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954590806] [2020-08-21 13:26:24,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:24,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:26:24,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541931070] [2020-08-21 13:26:24,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:26:24,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:26:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:26:24,106 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 13:26:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:24,209 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-08-21 13:26:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:26:24,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-21 13:26:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:24,218 INFO L225 Difference]: With dead ends: 40 [2020-08-21 13:26:24,219 INFO L226 Difference]: Without dead ends: 13 [2020-08-21 13:26:24,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-21 13:26:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-21 13:26:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-21 13:26:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-21 13:26:24,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-21 13:26:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:24,256 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-21 13:26:24,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:26:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-21 13:26:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 13:26:24,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:24,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:24,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:26:24,259 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:24,259 INFO L82 PathProgramCache]: Analyzing trace with hash -161295409, now seen corresponding path program 1 times [2020-08-21 13:26:24,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:24,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617599251] [2020-08-21 13:26:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:24,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:24,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617599251] [2020-08-21 13:26:24,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:24,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:26:24,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866990302] [2020-08-21 13:26:24,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:26:24,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:24,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:26:24,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:24,377 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-08-21 13:26:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:24,443 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-08-21 13:26:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:26:24,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-08-21 13:26:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:24,445 INFO L225 Difference]: With dead ends: 13 [2020-08-21 13:26:24,445 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:26:24,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:26:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:26:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:26:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:26:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:26:24,448 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-08-21 13:26:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:24,448 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:26:24,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:26:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:26:24,449 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:26:24,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:26:24,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:26:24,492 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:26:24,492 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:26:24,492 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:26:24,492 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:26:24,492 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:26:24,493 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:26:24,493 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 13:26:24,493 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 13:26:24,493 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 13:26:24,493 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 13:26:24,494 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 25) the Hoare annotation is: true [2020-08-21 13:26:24,494 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 25) no Hoare annotation was computed. [2020-08-21 13:26:24,494 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-08-21 13:26:24,494 INFO L268 CegarLoopResult]: For program point L18(lines 18 22) no Hoare annotation was computed. [2020-08-21 13:26:24,494 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 13:26:24,495 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 21) the Hoare annotation is: (< 0 main_~y~0) [2020-08-21 13:26:24,495 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 22) the Hoare annotation is: (or (<= main_~y~0 0) (< 99 main_~x~0)) [2020-08-21 13:26:24,495 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 25) no Hoare annotation was computed. [2020-08-21 13:26:24,495 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 13:26:24,496 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 13:26:24,496 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 13:26:24,496 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 13:26:24,496 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 13:26:24,496 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 13:26:24,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:26:24 BoogieIcfgContainer [2020-08-21 13:26:24,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:26:24,518 INFO L168 Benchmark]: Toolchain (without parser) took 1415.06 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 104.0 MB in the beginning and 124.0 MB in the end (delta: -20.1 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:24,519 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 13:26:24,520 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.55 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:24,522 INFO L168 Benchmark]: Boogie Preprocessor took 107.15 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.1 MB in the beginning and 181.3 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:24,523 INFO L168 Benchmark]: RCFGBuilder took 244.73 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 168.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:24,524 INFO L168 Benchmark]: TraceAbstraction took 801.67 ms. Allocated memory is still 202.9 MB. Free memory was 168.5 MB in the beginning and 124.0 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:24,528 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.55 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.15 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.1 MB in the beginning and 181.3 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.73 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 168.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 801.67 ms. Allocated memory is still 202.9 MB. Free memory was 168.5 MB in the beginning and 124.0 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: 0 < y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 11 SDslu, 84 SDs, 0 SdLazy, 28 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 11 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 455 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...