/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bAnd1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:51:49,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:51:49,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:51:49,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:51:49,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:51:49,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:51:49,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:51:49,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:51:49,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:51:49,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:51:49,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:51:49,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:51:49,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:51:49,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:51:49,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:51:49,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:51:49,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:51:49,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:51:49,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:51:49,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:51:49,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:51:49,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:51:49,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:51:49,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:51:49,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:51:49,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:51:49,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:51:49,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:51:49,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 22:51:49,410 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:51:49,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:51:49,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:51:49,412 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:51:49,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:51:49,412 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:51:49,412 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:51:49,413 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:51:49,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:51:49,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:51:49,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:51:49,413 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:51:49,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:51:49,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:51:49,414 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:51:49,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:51:49,415 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:51:49,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:51:49,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:51:49,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:51:49,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:51:49,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:51:49,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:51:49,416 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:51:49,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:51:49,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:51:49,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:51:49,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:51:49,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:51:49,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:51:49,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:51:49,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:51:49,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:51:49,419 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:51:49,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:51:49,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:51:49,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:51:49,419 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:51:49,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:51:49,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:51:49,743 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:51:49,745 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:51:49,745 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:51:49,746 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd1.i [2019-11-23 22:51:49,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4293bd575/bf0ead1ed0d54e5a96365ee9fa7c0aa2/FLAG6e6491ad1 [2019-11-23 22:51:50,273 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:51:50,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd1.i [2019-11-23 22:51:50,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4293bd575/bf0ead1ed0d54e5a96365ee9fa7c0aa2/FLAG6e6491ad1 [2019-11-23 22:51:50,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4293bd575/bf0ead1ed0d54e5a96365ee9fa7c0aa2 [2019-11-23 22:51:50,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:51:50,652 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:51:50,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:51:50,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:51:50,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:51:50,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:50,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e52da5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50, skipping insertion in model container [2019-11-23 22:51:50,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:50,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:51:50,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:51:50,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:51:50,886 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:51:50,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:51:51,007 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:51:51,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51 WrapperNode [2019-11-23 22:51:51,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:51:51,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:51:51,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:51:51,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:51:51,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (1/1) ... [2019-11-23 22:51:51,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (1/1) ... [2019-11-23 22:51:51,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:51:51,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:51:51,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:51:51,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:51:51,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (1/1) ... [2019-11-23 22:51:51,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (1/1) ... [2019-11-23 22:51:51,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (1/1) ... [2019-11-23 22:51:51,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (1/1) ... [2019-11-23 22:51:51,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (1/1) ... [2019-11-23 22:51:51,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (1/1) ... [2019-11-23 22:51:51,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (1/1) ... [2019-11-23 22:51:51,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:51:51,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:51:51,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:51:51,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:51:51,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (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 [2019-11-23 22:51:51,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:51:51,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:51:51,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:51:51,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:51:51,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:51:51,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:51:51,613 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:51:51,613 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:51:51,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:51:51 BoogieIcfgContainer [2019-11-23 22:51:51,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:51:51,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:51:51,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:51:51,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:51:51,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:51:50" (1/3) ... [2019-11-23 22:51:51,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727fa713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:51:51, skipping insertion in model container [2019-11-23 22:51:51,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51" (2/3) ... [2019-11-23 22:51:51,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727fa713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:51:51, skipping insertion in model container [2019-11-23 22:51:51,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:51:51" (3/3) ... [2019-11-23 22:51:51,621 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2019-11-23 22:51:51,629 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:51:51,635 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:51:51,647 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:51:51,668 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:51:51,668 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:51:51,668 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:51:51,668 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:51:51,669 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:51:51,669 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:51:51,669 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:51:51,669 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:51:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:51:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:51:51,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:51,688 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:51,688 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash -977729615, now seen corresponding path program 1 times [2019-11-23 22:51:51,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:51,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117206547] [2019-11-23 22:51:51,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:51:51,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117206547] [2019-11-23 22:51:51,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:51:51,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:51:51,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161842383] [2019-11-23 22:51:51,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:51:51,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:51:51,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:51:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:51:51,876 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 22:51:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:51:51,908 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 22:51:51,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:51:51,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:51:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:51:51,921 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:51:51,921 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:51:51,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:51:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:51:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:51:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:51:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-23 22:51:51,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-23 22:51:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:51:51,966 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-23 22:51:51,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:51:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-23 22:51:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:51:51,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:51,967 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:51,968 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:51,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1165895748, now seen corresponding path program 1 times [2019-11-23 22:51:51,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:51,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488460444] [2019-11-23 22:51:51,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:51:52,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488460444] [2019-11-23 22:51:52,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304036178] [2019-11-23 22:51:52,075 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 [2019-11-23 22:51:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:51:52,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:51:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:51:52,204 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:51:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:51:52,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:51:52,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:51:52,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319980045] [2019-11-23 22:51:52,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:51:52,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:51:52,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:51:52,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,224 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-23 22:51:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:51:52,273 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-23 22:51:52,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:51:52,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:51:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:51:52,274 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:51:52,274 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:51:52,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:51:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:51:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:51:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 22:51:52,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-23 22:51:52,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:51:52,281 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 22:51:52,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:51:52,281 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 22:51:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:51:52,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:52,282 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:52,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:51:52,483 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1510942468, now seen corresponding path program 1 times [2019-11-23 22:51:52,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:52,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866516322] [2019-11-23 22:51:52,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:51:52,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866516322] [2019-11-23 22:51:52,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270557507] [2019-11-23 22:51:52,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2019-11-23 22:51:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:51:52,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:51:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:51:52,615 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:51:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:51:52,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:51:52,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:51:52,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519206244] [2019-11-23 22:51:52,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:51:52,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:51:52,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:51:52,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,628 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-23 22:51:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:51:52,657 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 22:51:52,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:51:52,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:51:52,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:51:52,659 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:51:52,659 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:51:52,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:51:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:51:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:51:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 22:51:52,669 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-23 22:51:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:51:52,669 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 22:51:52,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:51:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 22:51:52,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:51:52,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:52,670 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:52,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:51:52,873 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1316778556, now seen corresponding path program 1 times [2019-11-23 22:51:52,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:52,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346275237] [2019-11-23 22:51:52,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:51:52,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346275237] [2019-11-23 22:51:52,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489794273] [2019-11-23 22:51:52,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:51:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:53,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:51:53,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:51:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:51:53,015 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:51:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:51:53,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029280974] [2019-11-23 22:51:53,067 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 22:51:53,068 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:51:53,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:51:53,080 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:51:53,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:52:47,870 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 304 [2019-11-23 22:52:55,407 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 325 [2019-11-23 22:52:55,626 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 323 [2019-11-23 22:52:58,071 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 323 [2019-11-23 22:53:01,172 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-23 22:53:01,305 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 330 [2019-11-23 22:53:03,706 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-23 22:53:03,816 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 333 [2019-11-23 22:53:06,139 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 336 [2019-11-23 22:53:11,374 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 344 [2019-11-23 22:53:13,741 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 347 [2019-11-23 22:53:13,854 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 347 [2019-11-23 22:53:16,371 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 22:53:16,495 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 349 [2019-11-23 22:53:16,623 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 22:53:16,731 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 351 [2019-11-23 22:53:19,447 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2019-11-23 22:53:19,568 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 354 [2019-11-23 22:53:19,713 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2019-11-23 22:53:19,823 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 357 [2019-11-23 22:53:22,392 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 366 [2019-11-23 22:53:22,539 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 359 [2019-11-23 22:53:22,664 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-11-23 22:53:22,770 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 361