/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/bor2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:51:49,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:51:49,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:51:49,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:51:49,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:51:49,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:51:49,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:51:49,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:51:49,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:51:49,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:51:49,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:51:49,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:51:49,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:51:49,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:51:49,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:51:49,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:51:49,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:51:49,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:51:49,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:51:49,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:51:49,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:51:49,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:51:49,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:51:49,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:51:49,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:51:49,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:51:49,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:51:49,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:51:49,507 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 22:51:49,522 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:51:49,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:51:49,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:51:49,524 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:51:49,524 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:51:49,524 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:51:49,524 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:51:49,524 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:51:49,525 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:51:49,525 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:51:49,525 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:51:49,525 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:51:49,525 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:51:49,526 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:51:49,526 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:51:49,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:51:49,527 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:51:49,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:51:49,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:51:49,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:51:49,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:51:49,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:51:49,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:51:49,528 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:51:49,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:51:49,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:51:49,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:51:49,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:51:49,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:51:49,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:51:49,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:51:49,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:51:49,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:51:49,530 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:51:49,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:51:49,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:51:49,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:51:49,531 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:51:49,801 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:51:49,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:51:49,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:51:49,824 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:51:49,825 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:51:49,825 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor2.i [2019-11-23 22:51:49,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e830772/bf35240961884678bc6899f218d443eb/FLAG14f27d7a4 [2019-11-23 22:51:50,378 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:51:50,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor2.i [2019-11-23 22:51:50,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e830772/bf35240961884678bc6899f218d443eb/FLAG14f27d7a4 [2019-11-23 22:51:50,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e830772/bf35240961884678bc6899f218d443eb [2019-11-23 22:51:50,819 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:51:50,821 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:51:50,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:51:50,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:51:50,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:51:50,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:50,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5936dba9 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 22:51:50,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:50,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:51:50,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:51:51,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:51:51,062 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:51:51,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:51:51,103 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:51:51,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:51 WrapperNode [2019-11-23 22:51:51,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:51:51,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:51:51,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:51:51,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:51:51,198 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 22:51:51,210 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 22:51:51,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:51:51,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:51:51,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:51:51,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:51:51,249 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 22:51:51,250 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 22:51:51,252 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 22:51:51,253 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 22:51:51,261 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 22:51:51,267 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 22:51:51,268 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 22:51:51,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:51:51,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:51:51,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:51:51,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:51:51,273 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 22:51:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:51:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:51:51,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:51:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:51:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:51:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:51:51,829 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:51:51,829 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:51:51,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:51:51 BoogieIcfgContainer [2019-11-23 22:51:51,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:51:51,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:51:51,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:51:51,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:51:51,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:51:50" (1/3) ... [2019-11-23 22:51:51,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20667b26 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 22:51:51,836 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 22:51:51,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20667b26 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 22:51:51,837 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 22:51:51,838 INFO L109 eAbstractionObserver]: Analyzing ICFG bor2.i [2019-11-23 22:51:51,848 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:51:51,856 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:51:51,867 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:51:51,891 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:51:51,892 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:51:51,892 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:51:51,892 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:51:51,893 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:51:51,893 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:51:51,893 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:51:51,893 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:51:51,906 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:51:51,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:51:51,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:51,912 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:51,913 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:51,918 INFO L82 PathProgramCache]: Analyzing trace with hash -977729615, now seen corresponding path program 1 times [2019-11-23 22:51:51,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:51,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616316174] [2019-11-23 22:51:51,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,062 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 22:51:52,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616316174] [2019-11-23 22:51:52,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:51:52,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:51:52,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701734558] [2019-11-23 22:51:52,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:51:52,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:51:52,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:51:52,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:51:52,088 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 22:51:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:51:52,122 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 22:51:52,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:51:52,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:51:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:51:52,134 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:51:52,135 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:51:52,138 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 22:51:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:51:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:51:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:51:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-23 22:51:52,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-23 22:51:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:51:52,176 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-23 22:51:52,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:51:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-23 22:51:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:51:52,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:52,177 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:52,178 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1165895748, now seen corresponding path program 1 times [2019-11-23 22:51:52,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:52,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293476318] [2019-11-23 22:51:52,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,248 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 22:51:52,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293476318] [2019-11-23 22:51:52,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658690973] [2019-11-23 22:51:52,249 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 22:51:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:51:52,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:51:52,354 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 22:51:52,354 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:51:52,378 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 22:51:52,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:51:52,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:51:52,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79641084] [2019-11-23 22:51:52,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:51:52,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:51:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:51:52,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,384 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-23 22:51:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:51:52,446 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-23 22:51:52,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:51:52,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:51:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:51:52,447 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:51:52,448 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:51:52,449 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 22:51:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:51:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:51:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:51:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 22:51:52,456 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-23 22:51:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:51:52,457 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 22:51:52,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:51:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 22:51:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:51:52,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:52,460 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:52,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:51:52,664 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1510942468, now seen corresponding path program 1 times [2019-11-23 22:51:52,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:52,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940021940] [2019-11-23 22:51:52,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,730 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 22:51:52,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940021940] [2019-11-23 22:51:52,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138430336] [2019-11-23 22:51:52,731 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 22:51:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:51:52,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:51:52,825 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 22:51:52,825 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:51:52,835 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 22:51:52,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:51:52,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:51:52,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859952297] [2019-11-23 22:51:52,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:51:52,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:51:52,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:51:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,837 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-23 22:51:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:51:52,863 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 22:51:52,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:51:52,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:51:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:51:52,866 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:51:52,866 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:51:52,867 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 22:51:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:51:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:51:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:51:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 22:51:52,872 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-23 22:51:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:51:52,872 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 22:51:52,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:51:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 22:51:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:51:52,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:52,873 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:53,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:51:53,084 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:53,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1316778556, now seen corresponding path program 1 times [2019-11-23 22:51:53,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:53,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340491390] [2019-11-23 22:51:53,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:53,173 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 22:51:53,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340491390] [2019-11-23 22:51:53,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179973308] [2019-11-23 22:51:53,174 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 22:51:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:53,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:51:53,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:51:53,237 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 22:51:53,237 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:51:53,258 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 22:51:53,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [947518535] [2019-11-23 22:51:53,285 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 22:51:53,285 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:51:53,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:51:53,299 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:51:53,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:52:02,195 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 168 [2019-11-23 22:52:30,041 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2019-11-23 22:52:30,232 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 257 [2019-11-23 22:52:30,419 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2019-11-23 22:52:30,587 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 259 [2019-11-23 22:52:54,344 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 308 [2019-11-23 22:52:59,483 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2019-11-23 22:52:59,778 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 318 [2019-11-23 22:53:04,666 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 323 [2019-11-23 22:53:07,367 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 328 [2019-11-23 22:53:09,870 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 339 [2019-11-23 22:53:09,981 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 335 [2019-11-23 22:53:15,076 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 343 [2019-11-23 22:53:15,201 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 342 [2019-11-23 22:53:15,456 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 344 [2019-11-23 22:53:15,682 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 348 [2019-11-23 22:53:18,205 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 355 [2019-11-23 22:53:18,328 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 352 [2019-11-23 22:53:21,022 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2019-11-23 22:53:21,136 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 356