/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/loop-invgen/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:18:04,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:18:04,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:18:04,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:18:04,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:18:04,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:18:04,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:18:04,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:18:04,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:18:04,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:18:04,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:18:04,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:18:04,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:18:04,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:18:04,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:18:04,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:18:04,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:18:04,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:18:04,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:18:04,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:18:04,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:18:04,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:18:04,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:18:04,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:18:04,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:18:04,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:18:04,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:18:04,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:18:04,990 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 [2019-11-24 04:18:05,012 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:18:05,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:18:05,014 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:18:05,015 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:18:05,015 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:18:05,015 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:18:05,015 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:18:05,015 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:18:05,016 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:18:05,016 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:18:05,017 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:18:05,017 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:18:05,017 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:18:05,018 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:18:05,018 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:18:05,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:18:05,020 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:18:05,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:18:05,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:18:05,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:18:05,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:18:05,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:18:05,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:18:05,021 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:18:05,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:18:05,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:18:05,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:18:05,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:18:05,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:18:05,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:18:05,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:18:05,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:18:05,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:18:05,024 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:18:05,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:18:05,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:18:05,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:18:05,025 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:18:05,293 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:18:05,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:18:05,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:18:05,318 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:18:05,318 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:18:05,319 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2019-11-24 04:18:05,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f877ea62/5ff567a91c16425a9b7f4b975a8f5811/FLAGfea4f9f06 [2019-11-24 04:18:05,825 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:18:05,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2019-11-24 04:18:05,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f877ea62/5ff567a91c16425a9b7f4b975a8f5811/FLAGfea4f9f06 [2019-11-24 04:18:06,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f877ea62/5ff567a91c16425a9b7f4b975a8f5811 [2019-11-24 04:18:06,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:18:06,231 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:18:06,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:18:06,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:18:06,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:18:06,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d10058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06, skipping insertion in model container [2019-11-24 04:18:06,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:18:06,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:18:06,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:18:06,479 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:18:06,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:18:06,504 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:18:06,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06 WrapperNode [2019-11-24 04:18:06,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:18:06,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:18:06,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:18:06,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:18:06,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:18:06,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:18:06,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:18:06,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:18:06,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (1/1) ... [2019-11-24 04:18:06,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:18:06,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:18:06,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:18:06,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:18:06,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (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 [2019-11-24 04:18:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:18:06,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:18:06,927 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:18:06,927 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 04:18:06,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:18:06 BoogieIcfgContainer [2019-11-24 04:18:06,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:18:06,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:18:06,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:18:06,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:18:06,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:18:06" (1/3) ... [2019-11-24 04:18:06,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72afe752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:18:06, skipping insertion in model container [2019-11-24 04:18:06,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:06" (2/3) ... [2019-11-24 04:18:06,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72afe752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:18:06, skipping insertion in model container [2019-11-24 04:18:06,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:18:06" (3/3) ... [2019-11-24 04:18:06,945 INFO L109 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2019-11-24 04:18:06,969 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:18:06,988 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:18:06,999 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:18:07,027 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:18:07,027 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:18:07,027 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:18:07,027 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:18:07,028 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:18:07,028 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:18:07,028 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:18:07,028 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:18:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-24 04:18:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:18:07,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:18:07,045 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:18:07,045 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:18:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:18:07,050 INFO L82 PathProgramCache]: Analyzing trace with hash 30968835, now seen corresponding path program 1 times [2019-11-24 04:18:07,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:18:07,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054556122] [2019-11-24 04:18:07,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:18:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:07,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054556122] [2019-11-24 04:18:07,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:18:07,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:18:07,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102476936] [2019-11-24 04:18:07,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:18:07,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:18:07,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:18:07,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:18:07,268 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2019-11-24 04:18:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:18:07,343 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-24 04:18:07,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:18:07,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-24 04:18:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:18:07,352 INFO L225 Difference]: With dead ends: 27 [2019-11-24 04:18:07,352 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:18:07,355 INFO L630 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 [2019-11-24 04:18:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:18:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-24 04:18:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:18:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-24 04:18:07,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2019-11-24 04:18:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:18:07,385 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-24 04:18:07,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:18:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-24 04:18:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:18:07,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:18:07,386 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:18:07,387 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:18:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:18:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash -303564954, now seen corresponding path program 1 times [2019-11-24 04:18:07,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:18:07,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147632852] [2019-11-24 04:18:07,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:18:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:07,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147632852] [2019-11-24 04:18:07,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:18:07,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:18:07,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562571629] [2019-11-24 04:18:07,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:18:07,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:18:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:18:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:18:07,436 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2019-11-24 04:18:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:18:07,495 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-24 04:18:07,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:18:07,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-24 04:18:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:18:07,498 INFO L225 Difference]: With dead ends: 16 [2019-11-24 04:18:07,498 INFO L226 Difference]: Without dead ends: 14 [2019-11-24 04:18:07,499 INFO L630 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 [2019-11-24 04:18:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-24 04:18:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-24 04:18:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-24 04:18:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-24 04:18:07,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2019-11-24 04:18:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:18:07,508 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-24 04:18:07,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:18:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-24 04:18:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:18:07,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:18:07,509 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-24 04:18:07,510 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:18:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:18:07,510 INFO L82 PathProgramCache]: Analyzing trace with hash -353986803, now seen corresponding path program 1 times [2019-11-24 04:18:07,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:18:07,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308485621] [2019-11-24 04:18:07,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:18:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:07,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308485621] [2019-11-24 04:18:07,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803221021] [2019-11-24 04:18:07,603 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 [2019-11-24 04:18:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:07,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-24 04:18:07,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:18:07,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:18:07,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:18:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:07,781 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:18:07,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:18:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:07,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872148416] [2019-11-24 04:18:07,898 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 04:18:07,898 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:18:07,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:18:07,912 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:18:07,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:18:08,958 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 163 [2019-11-24 04:18:09,326 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 202 [2019-11-24 04:18:09,689 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2019-11-24 04:18:09,973 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 250 [2019-11-24 04:18:10,316 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 243 [2019-11-24 04:18:10,688 WARN L192 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 336 [2019-11-24 04:18:11,129 WARN L192 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 328 [2019-11-24 04:18:11,680 WARN L192 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 433 [2019-11-24 04:18:12,273 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 424 [2019-11-24 04:18:12,933 WARN L192 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 582 [2019-11-24 04:18:13,960 WARN L192 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 564 [2019-11-24 04:18:15,041 WARN L192 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 744 [2019-11-24 04:18:16,229 WARN L192 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 743 DAG size of output: 734 [2019-11-24 04:18:17,805 WARN L192 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 947 DAG size of output: 938 [2019-11-24 04:18:20,317 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 938 DAG size of output: 909 [2019-11-24 04:18:22,257 WARN L192 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 894 [2019-11-24 04:18:24,020 WARN L192 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 895 DAG size of output: 890 [2019-11-24 04:18:26,899 WARN L192 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 1175 DAG size of output: 1171 [2019-11-24 04:18:30,381 WARN L192 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 1170 DAG size of output: 1058 [2019-11-24 04:18:32,998 WARN L192 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 968 DAG size of output: 912 [2019-11-24 04:18:35,018 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 888 DAG size of output: 863 [2019-11-24 04:18:38,995 WARN L192 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 1262 DAG size of output: 1237 [2019-11-24 04:18:42,946 WARN L192 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 1204 DAG size of output: 1191 [2019-11-24 04:18:49,880 WARN L192 SmtUtils]: Spent 6.70 s on a formula simplification. DAG size of input: 1714 DAG size of output: 1700 [2019-11-24 04:18:57,312 WARN L192 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 1667 DAG size of output: 1658 [2019-11-24 04:19:13,127 WARN L192 SmtUtils]: Spent 15.50 s on a formula simplification. DAG size of input: 2515 DAG size of output: 2487 [2019-11-24 04:19:30,120 WARN L192 SmtUtils]: Spent 16.62 s on a formula simplification. DAG size of input: 2453 DAG size of output: 2441