/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-lit/gsv2008.c.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:51:06,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:51:06,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:51:07,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:51:07,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:51:07,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:51:07,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:51:07,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:51:07,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:51:07,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:51:07,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:51:07,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:51:07,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:51:07,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:51:07,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:51:07,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:51:07,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:51:07,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:51:07,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:51:07,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:51:07,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:51:07,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:51:07,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:51:07,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:51:07,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:51:07,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:51:07,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:51:07,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:51:07,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:51:07,136 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:51:07,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:51:07,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:51:07,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:51:07,142 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:51:07,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:51:07,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:51:07,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:51:07,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:51:07,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:51:07,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:51:07,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:51:07,161 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:51:07,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:51:07,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:51:07,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:51:07,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:51:07,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:51:07,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:51:07,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:51:07,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:51:07,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:51:07,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:51:07,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:51:07,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:51:07,165 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:51:07,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:51:07,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:51:07,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:51:07,612 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:51:07,613 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:51:07,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2021-01-06 16:51:07,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3abe86afb/f27109878fdc4cdbba069be9533e413d/FLAGe51e9c7da [2021-01-06 16:51:08,301 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:51:08,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2021-01-06 16:51:08,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3abe86afb/f27109878fdc4cdbba069be9533e413d/FLAGe51e9c7da [2021-01-06 16:51:08,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3abe86afb/f27109878fdc4cdbba069be9533e413d [2021-01-06 16:51:08,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:51:08,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:51:08,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:51:08,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:51:08,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:51:08,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:08,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@219bc010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08, skipping insertion in model container [2021-01-06 16:51:08,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:08,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:51:08,722 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2021-01-06 16:51:08,886 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/gsv2008.c.i.p+cfa-reducer.c[989,1002] left hand side expression in assignment: lhs: VariableLHS[~__return_144~0,GLOBAL] [2021-01-06 16:51:08,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:51:08,904 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2021-01-06 16:51:08,925 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/gsv2008.c.i.p+cfa-reducer.c[989,1002] left hand side expression in assignment: lhs: VariableLHS[~__return_144~0,GLOBAL] [2021-01-06 16:51:08,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:51:08,945 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:51:08,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08 WrapperNode [2021-01-06 16:51:08,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:51:08,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:51:08,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:51:08,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:51:08,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:08,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:08,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:51:08,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:51:08,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:51:08,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:51:08,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:08,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:09,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:09,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:09,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:09,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:09,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... [2021-01-06 16:51:09,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:51:09,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:51:09,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:51:09,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:51:09,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:51:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:51:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:51:09,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:51:09,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:51:09,417 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 16:51:09,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:51:09 BoogieIcfgContainer [2021-01-06 16:51:09,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:51:09,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:51:09,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:51:09,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:51:09,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:51:08" (1/3) ... [2021-01-06 16:51:09,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6710c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:51:09, skipping insertion in model container [2021-01-06 16:51:09,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:08" (2/3) ... [2021-01-06 16:51:09,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6710c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:51:09, skipping insertion in model container [2021-01-06 16:51:09,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:51:09" (3/3) ... [2021-01-06 16:51:09,441 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c [2021-01-06 16:51:09,457 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:51:09,462 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:51:09,482 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:51:09,508 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:51:09,508 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:51:09,508 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:51:09,508 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:51:09,509 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:51:09,509 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:51:09,509 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:51:09,509 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:51:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-01-06 16:51:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:51:09,529 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:09,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:09,530 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1806908747, now seen corresponding path program 1 times [2021-01-06 16:51:09,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:09,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178502444] [2021-01-06 16:51:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:09,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178502444] [2021-01-06 16:51:09,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:51:09,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:51:09,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787962058] [2021-01-06 16:51:09,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:51:09,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:51:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:51:09,785 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2021-01-06 16:51:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:09,817 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-01-06 16:51:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:51:09,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-06 16:51:09,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:09,831 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:51:09,832 INFO L226 Difference]: Without dead ends: 9 [2021-01-06 16:51:09,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:51:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-01-06 16:51:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-01-06 16:51:09,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:51:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-01-06 16:51:09,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-01-06 16:51:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:09,874 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-01-06 16:51:09,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:51:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-01-06 16:51:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:51:09,875 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:09,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:09,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:51:09,876 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:09,877 INFO L82 PathProgramCache]: Analyzing trace with hash 179533835, now seen corresponding path program 1 times [2021-01-06 16:51:09,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:09,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144859478] [2021-01-06 16:51:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:09,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144859478] [2021-01-06 16:51:09,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330073868] [2021-01-06 16:51:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:51:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:10,174 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:51:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:10,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:10,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:51:10,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073589955] [2021-01-06 16:51:10,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:51:10,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:10,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:51:10,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:51:10,209 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2021-01-06 16:51:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:10,267 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-01-06 16:51:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:51:10,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 16:51:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:10,269 INFO L225 Difference]: With dead ends: 13 [2021-01-06 16:51:10,269 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:51:10,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:51:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:51:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:51:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:51:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-01-06 16:51:10,274 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-01-06 16:51:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:10,275 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-01-06 16:51:10,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:51:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-01-06 16:51:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:51:10,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:10,276 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:10,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:51:10,490 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1270519115, now seen corresponding path program 2 times [2021-01-06 16:51:10,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:10,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286703633] [2021-01-06 16:51:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:10,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286703633] [2021-01-06 16:51:10,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859937657] [2021-01-06 16:51:10,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:10,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:10,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:51:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:10,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:51:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:10,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:10,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:51:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819647090] [2021-01-06 16:51:10,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:51:10,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:51:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:51:10,785 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2021-01-06 16:51:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:10,840 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-01-06 16:51:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:51:10,841 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-06 16:51:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:10,841 INFO L225 Difference]: With dead ends: 14 [2021-01-06 16:51:10,841 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:51:10,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:51:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:51:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 16:51:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:51:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-01-06 16:51:10,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-01-06 16:51:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:10,846 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-01-06 16:51:10,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:51:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-01-06 16:51:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:51:10,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:10,847 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:11,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:11,061 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:11,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:11,063 INFO L82 PathProgramCache]: Analyzing trace with hash 731324427, now seen corresponding path program 3 times [2021-01-06 16:51:11,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:11,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366683601] [2021-01-06 16:51:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:51:11,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366683601] [2021-01-06 16:51:11,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:51:11,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:51:11,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766178863] [2021-01-06 16:51:11,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:51:11,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:51:11,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:51:11,125 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2021-01-06 16:51:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:11,156 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-01-06 16:51:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:51:11,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-01-06 16:51:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:11,157 INFO L225 Difference]: With dead ends: 11 [2021-01-06 16:51:11,157 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:51:11,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:51:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:51:11,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:51:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:51:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:51:11,159 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-01-06 16:51:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:11,159 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:51:11,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:51:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:51:11,160 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:51:11,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:51:11,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:51:11,188 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:51:11,189 INFO L189 CegarLoopUtils]: For program point L25(lines 25 58) no Hoare annotation was computed. [2021-01-06 16:51:11,189 INFO L192 CegarLoopUtils]: At program point L54(lines 13 60) the Hoare annotation is: true [2021-01-06 16:51:11,189 INFO L189 CegarLoopUtils]: For program point L19(lines 19 59) no Hoare annotation was computed. [2021-01-06 16:51:11,189 INFO L189 CegarLoopUtils]: For program point L48(line 48) no Hoare annotation was computed. [2021-01-06 16:51:11,190 INFO L189 CegarLoopUtils]: For program point L46(lines 46 55) no Hoare annotation was computed. [2021-01-06 16:51:11,190 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:51:11,190 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:51:11,190 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:51:11,190 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2021-01-06 16:51:11,191 INFO L185 CegarLoopUtils]: At program point L37(lines 30 58) the Hoare annotation is: (or (<= (+ ULTIMATE.start_main_~main__x~0 50) 0) (<= (+ ULTIMATE.start_main_~main__x~0 2) ULTIMATE.start_main_~main__y~0)) [2021-01-06 16:51:11,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:51:11 BoogieIcfgContainer [2021-01-06 16:51:11,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:51:11,210 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:51:11,210 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:51:11,210 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:51:11,211 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:51:09" (3/4) ... [2021-01-06 16:51:11,215 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:51:11,227 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 16:51:11,227 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:51:11,227 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:51:11,227 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:51:11,267 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-lit/gsv2008.c.i.p+cfa-reducer.c-witness.graphml [2021-01-06 16:51:11,267 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:51:11,269 INFO L168 Benchmark]: Toolchain (without parser) took 2599.26 ms. Allocated memory is still 161.5 MB. Free memory was 137.6 MB in the beginning and 75.2 MB in the end (delta: 62.3 MB). Peak memory consumption was 63.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:51:11,270 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 161.5 MB. Free memory is still 137.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:51:11,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.80 ms. Allocated memory is still 161.5 MB. Free memory was 137.4 MB in the beginning and 127.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:51:11,272 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.17 ms. Allocated memory is still 161.5 MB. Free memory was 127.7 MB in the beginning and 126.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:51:11,272 INFO L168 Benchmark]: Boogie Preprocessor took 21.48 ms. Allocated memory is still 161.5 MB. Free memory was 126.1 MB in the beginning and 125.3 MB in the end (delta: 786.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:51:11,273 INFO L168 Benchmark]: RCFGBuilder took 411.95 ms. Allocated memory is still 161.5 MB. Free memory was 125.3 MB in the beginning and 114.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:51:11,274 INFO L168 Benchmark]: TraceAbstraction took 1784.89 ms. Allocated memory is still 161.5 MB. Free memory was 113.5 MB in the beginning and 77.9 MB in the end (delta: 35.7 MB). Peak memory consumption was 36.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:51:11,275 INFO L168 Benchmark]: Witness Printer took 57.46 ms. Allocated memory is still 161.5 MB. Free memory was 77.9 MB in the beginning and 75.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:51:11,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 161.5 MB. Free memory is still 137.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.80 ms. Allocated memory is still 161.5 MB. Free memory was 137.4 MB in the beginning and 127.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.17 ms. Allocated memory is still 161.5 MB. Free memory was 127.7 MB in the beginning and 126.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.48 ms. Allocated memory is still 161.5 MB. Free memory was 126.1 MB in the beginning and 125.3 MB in the end (delta: 786.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 411.95 ms. Allocated memory is still 161.5 MB. Free memory was 125.3 MB in the beginning and 114.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1784.89 ms. Allocated memory is still 161.5 MB. Free memory was 113.5 MB in the beginning and 77.9 MB in the end (delta: 35.7 MB). Peak memory consumption was 36.4 MB. Max. memory is 8.0 GB. * Witness Printer took 57.46 ms. Allocated memory is still 161.5 MB. Free memory was 77.9 MB in the beginning and 75.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: main__x + 50 <= 0 || main__x + 2 <= main__y - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 7 SDslu, 34 SDs, 0 SdLazy, 52 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 12 HoareAnnotationTreeSize, 2 FomulaSimplifications, 24 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 1129 SizeOfPredicates, 6 NumberOfNonLiveVariables, 123 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 6/14 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...