/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/zero_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:56:34,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:56:34,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:56:34,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:56:34,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:56:34,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:56:34,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:56:34,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:56:34,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:56:34,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:56:34,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:56:34,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:56:34,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:56:34,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:56:34,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:56:34,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:56:34,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:56:34,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:56:34,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:56:34,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:56:34,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:56:34,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:56:34,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:56:34,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:56:34,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:56:34,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:56:34,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:56:34,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:56:34,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:56:34,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:56:34,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:56:34,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:56:34,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:56:34,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:56:34,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:56:34,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:56:34,093 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 22:56:34,108 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:56:34,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:56:34,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:56:34,109 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:56:34,109 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:56:34,110 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:56:34,110 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:56:34,110 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:56:34,110 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:56:34,110 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:56:34,110 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:56:34,111 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:56:34,111 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:56:34,111 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:56:34,111 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:56:34,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:56:34,112 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:56:34,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:56:34,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:56:34,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:56:34,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:56:34,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:56:34,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:56:34,114 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:56:34,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:56:34,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:56:34,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:56:34,114 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:56:34,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:56:34,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:56:34,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:56:34,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:56:34,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:56:34,116 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:56:34,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:56:34,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:56:34,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:56:34,117 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:56:34,395 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:56:34,413 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:56:34,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:56:34,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:56:34,419 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:56:34,420 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2019-11-23 22:56:34,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1627d4bc4/60ac79f21bed4dfa8a6d871d42d3d2b6/FLAG7ee75f8ec [2019-11-23 22:56:34,953 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:56:34,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum3.c [2019-11-23 22:56:34,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1627d4bc4/60ac79f21bed4dfa8a6d871d42d3d2b6/FLAG7ee75f8ec [2019-11-23 22:56:35,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1627d4bc4/60ac79f21bed4dfa8a6d871d42d3d2b6 [2019-11-23 22:56:35,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:56:35,390 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:56:35,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:35,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:56:35,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:56:35,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b9ebb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35, skipping insertion in model container [2019-11-23 22:56:35,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:56:35,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:56:35,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:35,619 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:56:35,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:35,662 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:56:35,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35 WrapperNode [2019-11-23 22:56:35,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:35,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:35,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:56:35,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:56:35,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:35,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:56:35,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:56:35,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:56:35,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (1/1) ... [2019-11-23 22:56:35,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:56:35,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:56:35,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:56:35,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:56:35,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (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 22:56:35,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:56:35,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:56:35,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:56:35,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:56:35,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:56:35,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:56:36,331 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:56:36,331 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 22:56:36,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:36 BoogieIcfgContainer [2019-11-23 22:56:36,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:56:36,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:56:36,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:56:36,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:56:36,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:56:35" (1/3) ... [2019-11-23 22:56:36,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1553e68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:36, skipping insertion in model container [2019-11-23 22:56:36,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:35" (2/3) ... [2019-11-23 22:56:36,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1553e68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:36, skipping insertion in model container [2019-11-23 22:56:36,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:36" (3/3) ... [2019-11-23 22:56:36,340 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2019-11-23 22:56:36,348 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:56:36,355 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:56:36,365 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:56:36,384 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:56:36,384 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:56:36,384 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:56:36,385 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:56:36,385 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:56:36,385 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:56:36,385 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:56:36,385 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:56:36,396 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 22:56:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:56:36,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:36,402 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:36,402 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:36,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:36,408 INFO L82 PathProgramCache]: Analyzing trace with hash 331300031, now seen corresponding path program 1 times [2019-11-23 22:56:36,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:36,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60870159] [2019-11-23 22:56:36,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:36,589 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 22:56:36,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60870159] [2019-11-23 22:56:36,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:36,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:36,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793702326] [2019-11-23 22:56:36,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:36,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:36,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:36,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:36,610 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2019-11-23 22:56:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:36,713 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2019-11-23 22:56:36,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:56:36,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 22:56:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:36,725 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:56:36,725 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:56:36,728 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 [2019-11-23 22:56:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:56:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:56:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:56:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2019-11-23 22:56:36,764 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 11 [2019-11-23 22:56:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:36,764 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2019-11-23 22:56:36,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2019-11-23 22:56:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:56:36,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:36,766 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:36,766 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:36,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1375133157, now seen corresponding path program 1 times [2019-11-23 22:56:36,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:36,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904554820] [2019-11-23 22:56:36,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:36,812 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 22:56:36,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904554820] [2019-11-23 22:56:36,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:36,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:56:36,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361533158] [2019-11-23 22:56:36,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:56:36,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:36,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:56:36,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:56:36,816 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand 3 states. [2019-11-23 22:56:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:36,860 INFO L93 Difference]: Finished difference Result 34 states and 56 transitions. [2019-11-23 22:56:36,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:56:36,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 22:56:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:36,861 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:56:36,861 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:56:36,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:56:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:56:36,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:56:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:56:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2019-11-23 22:56:36,868 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 12 [2019-11-23 22:56:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:36,869 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2019-11-23 22:56:36,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:56:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2019-11-23 22:56:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:56:36,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:36,870 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:36,870 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:36,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:36,871 INFO L82 PathProgramCache]: Analyzing trace with hash -312951973, now seen corresponding path program 1 times [2019-11-23 22:56:36,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:36,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721695077] [2019-11-23 22:56:36,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:56:36,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721695077] [2019-11-23 22:56:36,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:36,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:36,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063346115] [2019-11-23 22:56:36,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:36,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:36,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:36,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:36,939 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand 4 states. [2019-11-23 22:56:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:37,006 INFO L93 Difference]: Finished difference Result 32 states and 52 transitions. [2019-11-23 22:56:37,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:56:37,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 22:56:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:37,008 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:56:37,008 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:56:37,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:56:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:56:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:56:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-23 22:56:37,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2019-11-23 22:56:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:37,017 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-23 22:56:37,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2019-11-23 22:56:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:56:37,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:37,018 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:37,019 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash 860667680, now seen corresponding path program 1 times [2019-11-23 22:56:37,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:37,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493653911] [2019-11-23 22:56:37,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:56:37,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493653911] [2019-11-23 22:56:37,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110832969] [2019-11-23 22:56:37,146 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 22:56:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:37,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:56:37,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:56:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:56:37,289 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:56:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:56:37,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338596842] [2019-11-23 22:56:37,350 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-23 22:56:37,355 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:56:37,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:56:37,375 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:56:37,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:56:39,266 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2019-11-23 22:57:16,963 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 275 [2019-11-23 22:57:33,898 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 309 [2019-11-23 22:57:34,103 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 310 [2019-11-23 22:57:34,327 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 312 [2019-11-23 22:57:37,145 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 320 [2019-11-23 22:57:39,581 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 323 [2019-11-23 22:57:41,843 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 330 [2019-11-23 22:57:41,982 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 326 [2019-11-23 22:57:44,634 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-23 22:57:44,910 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 329 [2019-11-23 22:57:45,101 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2019-11-23 22:57:45,209 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 333 [2019-11-23 22:57:47,599 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2019-11-23 22:57:47,724 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 337 [2019-11-23 22:57:50,464 WARN L192 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 344 [2019-11-23 22:57:50,707 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 341 [2019-11-23 22:57:53,581 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 22:57:53,715 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 343 [2019-11-23 22:57:53,850 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2019-11-23 22:57:54,053 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 345 [2019-11-23 22:57:56,561 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2019-11-23 22:57:56,695 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 347 [2019-11-23 22:57:56,820 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 22:57:56,928 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 349 [2019-11-23 22:57:59,487 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 366 [2019-11-23 22:57:59,628 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365 [2019-11-23 22:58:02,306 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 371 [2019-11-23 22:58:02,452 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 369 [2019-11-23 22:58:05,575 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 373 [2019-11-23 22:58:05,733 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 374