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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:06:36,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:06:36,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:06:36,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:06:36,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:06:36,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:06:36,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:06:36,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:06:36,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:06:36,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:06:36,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:06:36,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:06:36,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:06:36,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:06:36,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:06:36,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:06:36,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:06:36,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:06:36,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:06:36,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:06:36,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:06:36,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:06:36,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:06:36,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:06:36,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:06:36,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:06:36,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:06:36,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:06:36,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:06:36,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:06:36,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:06:36,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:06:36,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:06:36,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:06:36,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:06:36,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:06:36,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:06:36,702 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:06:36,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:06:36,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:06:36,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:06:36,704 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:06:36,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:06:36,704 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:06:36,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:06:36,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:06:36,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:06:36,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:06:36,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:06:36,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:06:36,706 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:06:36,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:06:36,706 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:06:36,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:06:36,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:06:36,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:06:36,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:06:36,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:06:36,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:06:36,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:06:36,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:06:36,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:06:36,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:06:36,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:06:36,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:06:36,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:06:36,987 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:06:37,000 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:06:37,003 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:06:37,005 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:06:37,005 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:06:37,006 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c [2019-10-13 21:06:37,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b75fac56/e923ffb88d8d4c4484c2083c4678fbbb/FLAGa253a50bc [2019-10-13 21:06:37,546 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:06:37,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c [2019-10-13 21:06:37,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b75fac56/e923ffb88d8d4c4484c2083c4678fbbb/FLAGa253a50bc [2019-10-13 21:06:37,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b75fac56/e923ffb88d8d4c4484c2083c4678fbbb [2019-10-13 21:06:37,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:06:37,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:06:37,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:06:37,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:06:37,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:06:37,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:06:37" (1/1) ... [2019-10-13 21:06:37,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ed2b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:37, skipping insertion in model container [2019-10-13 21:06:37,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:06:37" (1/1) ... [2019-10-13 21:06:37,941 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:06:37,966 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:06:38,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:06:38,152 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:06:38,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:06:38,186 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:06:38,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38 WrapperNode [2019-10-13 21:06:38,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:06:38,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:06:38,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:06:38,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:06:38,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38" (1/1) ... [2019-10-13 21:06:38,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38" (1/1) ... [2019-10-13 21:06:38,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38" (1/1) ... [2019-10-13 21:06:38,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38" (1/1) ... [2019-10-13 21:06:38,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38" (1/1) ... [2019-10-13 21:06:38,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38" (1/1) ... [2019-10-13 21:06:38,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38" (1/1) ... [2019-10-13 21:06:38,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:06:38,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:06:38,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:06:38,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:06:38,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:06:38,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:06:38,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:06:38,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:06:38,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:06:38,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 21:06:38,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:06:38,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:06:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:06:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:06:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:06:38,563 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:06:38,563 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 21:06:38,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:06:38 BoogieIcfgContainer [2019-10-13 21:06:38,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:06:38,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:06:38,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:06:38,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:06:38,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:06:37" (1/3) ... [2019-10-13 21:06:38,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b84b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:06:38, skipping insertion in model container [2019-10-13 21:06:38,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:38" (2/3) ... [2019-10-13 21:06:38,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b84b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:06:38, skipping insertion in model container [2019-10-13 21:06:38,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:06:38" (3/3) ... [2019-10-13 21:06:38,573 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+lhb-reducer.c [2019-10-13 21:06:38,584 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:06:38,599 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:06:38,611 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:06:38,677 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:06:38,677 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:06:38,677 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:06:38,677 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:06:38,678 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:06:38,678 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:06:38,678 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:06:38,678 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:06:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-13 21:06:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 21:06:38,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:38,706 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:38,709 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:38,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:38,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1883805102, now seen corresponding path program 1 times [2019-10-13 21:06:38,725 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:38,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193947570] [2019-10-13 21:06:38,726 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:38,726 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:38,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:38,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193947570] [2019-10-13 21:06:38,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:06:38,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:06:38,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613379224] [2019-10-13 21:06:38,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:06:38,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:38,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:06:38,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:06:38,938 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2019-10-13 21:06:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:39,062 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-10-13 21:06:39,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:06:39,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-13 21:06:39,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:39,072 INFO L225 Difference]: With dead ends: 33 [2019-10-13 21:06:39,073 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 21:06:39,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:06:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 21:06:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 21:06:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 21:06:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-13 21:06:39,112 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-10-13 21:06:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:39,113 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-13 21:06:39,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:06:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-13 21:06:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 21:06:39,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:39,114 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:39,115 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:39,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2141584271, now seen corresponding path program 1 times [2019-10-13 21:06:39,116 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:39,116 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587112636] [2019-10-13 21:06:39,116 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:39,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:39,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:39,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587112636] [2019-10-13 21:06:39,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011521793] [2019-10-13 21:06:39,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2019-10-13 21:06:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:39,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:06:39,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:06:39,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:06:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:39,355 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:06:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:39,424 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:06:39,425 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:06:39,425 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464184201] [2019-10-13 21:06:39,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:06:39,427 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:06:39,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:06:39,428 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2019-10-13 21:06:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:39,475 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-10-13 21:06:39,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:06:39,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-10-13 21:06:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:39,477 INFO L225 Difference]: With dead ends: 16 [2019-10-13 21:06:39,477 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 21:06:39,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:06:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 21:06:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 21:06:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 21:06:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 21:06:39,480 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-10-13 21:06:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:39,483 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 21:06:39,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:06:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 21:06:39,483 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 21:06:39,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:06:39,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 21:06:39,724 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-13 21:06:39,724 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-13 21:06:39,724 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:06:39,725 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:06:39,725 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 21:06:39,725 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 21:06:39,725 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 21:06:39,725 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 9 69) the Hoare annotation is: true [2019-10-13 21:06:39,726 INFO L443 ceAbstractionStarter]: For program point L27(lines 27 66) no Hoare annotation was computed. [2019-10-13 21:06:39,726 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 9 69) no Hoare annotation was computed. [2019-10-13 21:06:39,726 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 67) no Hoare annotation was computed. [2019-10-13 21:06:39,726 INFO L443 ceAbstractionStarter]: For program point L52(line 52) no Hoare annotation was computed. [2019-10-13 21:06:39,726 INFO L443 ceAbstractionStarter]: For program point L50(lines 50 59) no Hoare annotation was computed. [2019-10-13 21:06:39,726 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 68) no Hoare annotation was computed. [2019-10-13 21:06:39,726 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 9 69) no Hoare annotation was computed. [2019-10-13 21:06:39,727 INFO L439 ceAbstractionStarter]: At program point L41(lines 28 62) the Hoare annotation is: (or (< main_~main__x~0 0) (< 0 main_~main__y~0)) [2019-10-13 21:06:39,727 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 52) no Hoare annotation was computed. [2019-10-13 21:06:39,727 INFO L443 ceAbstractionStarter]: For program point L35(lines 35 61) no Hoare annotation was computed. [2019-10-13 21:06:39,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:06:39 BoogieIcfgContainer [2019-10-13 21:06:39,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 21:06:39,756 INFO L168 Benchmark]: Toolchain (without parser) took 1829.45 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 102.9 MB in the beginning and 111.0 MB in the end (delta: -8.2 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:39,758 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-13 21:06:39,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.24 ms. Allocated memory is still 146.3 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:39,761 INFO L168 Benchmark]: Boogie Preprocessor took 134.85 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 93.0 MB in the beginning and 183.4 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:39,763 INFO L168 Benchmark]: RCFGBuilder took 242.69 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 171.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:39,765 INFO L168 Benchmark]: TraceAbstraction took 1185.98 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 111.0 MB in the end (delta: 59.4 MB). Peak memory consumption was 59.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:39,775 INFO L335 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 146.3 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.24 ms. Allocated memory is still 146.3 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.85 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 93.0 MB in the beginning and 183.4 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 242.69 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 171.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1185.98 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 111.0 MB in the end (delta: 59.4 MB). Peak memory consumption was 59.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 52]: 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: 28]: Loop Invariant Derived loop invariant: main__x < 0 || 0 < main__y - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Result: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 13 SDslu, 63 SDs, 0 SdLazy, 27 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 5 LocationsWithAnnotation, 5 PreInvPairs, 6 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 13 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 2380 SizeOfPredicates, 6 NumberOfNonLiveVariables, 70 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...