/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-examples/standard_strcpy_original-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:14:16,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:14:16,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:14:16,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:14:16,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:14:16,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:14:16,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:14:16,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:14:16,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:14:16,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:14:16,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:14:16,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:14:16,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:14:16,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:14:16,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:14:16,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:14:16,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:14:16,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:14:16,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:14:16,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:14:16,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:14:16,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:14:16,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:14:16,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:14:16,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:14:16,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:14:16,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:14:16,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:14:16,637 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 23:14:16,655 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:14:16,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:14:16,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:14:16,657 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:14:16,658 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:14:16,658 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:14:16,658 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:14:16,659 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:14:16,659 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:14:16,659 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:14:16,660 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:14:16,660 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:14:16,660 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:14:16,661 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:14:16,661 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:14:16,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:14:16,663 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:14:16,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:14:16,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:14:16,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:14:16,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:14:16,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:14:16,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:14:16,664 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:14:16,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:14:16,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:14:16,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:14:16,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:14:16,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:14:16,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:14:16,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:14:16,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:14:16,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:14:16,667 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:14:16,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:14:16,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:14:16,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:14:16,668 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:14:16,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:14:16,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:14:16,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:14:16,944 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:14:16,944 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:14:16,945 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2019-11-23 23:14:17,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ebccabea/a5b0ff5a8c514a7f837ae0567aedba43/FLAGb9c4b8e99 [2019-11-23 23:14:17,417 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:14:17,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2019-11-23 23:14:17,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ebccabea/a5b0ff5a8c514a7f837ae0567aedba43/FLAGb9c4b8e99 [2019-11-23 23:14:17,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ebccabea/a5b0ff5a8c514a7f837ae0567aedba43 [2019-11-23 23:14:17,793 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:14:17,795 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:14:17,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:14:17,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:14:17,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:14:17,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:14:17" (1/1) ... [2019-11-23 23:14:17,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5362047b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:17, skipping insertion in model container [2019-11-23 23:14:17,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:14:17" (1/1) ... [2019-11-23 23:14:17,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:14:17,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:14:18,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:14:18,066 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:14:18,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:14:18,113 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:14:18,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18 WrapperNode [2019-11-23 23:14:18,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:14:18,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:14:18,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:14:18,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:14:18,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (1/1) ... [2019-11-23 23:14:18,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (1/1) ... [2019-11-23 23:14:18,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:14:18,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:14:18,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:14:18,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:14:18,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (1/1) ... [2019-11-23 23:14:18,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (1/1) ... [2019-11-23 23:14:18,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (1/1) ... [2019-11-23 23:14:18,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (1/1) ... [2019-11-23 23:14:18,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (1/1) ... [2019-11-23 23:14:18,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (1/1) ... [2019-11-23 23:14:18,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (1/1) ... [2019-11-23 23:14:18,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:14:18,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:14:18,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:14:18,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:14:18,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (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 23:14:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:14:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:14:18,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:14:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:14:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:14:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:14:18,734 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:14:18,735 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:14:18,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:14:18 BoogieIcfgContainer [2019-11-23 23:14:18,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:14:18,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:14:18,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:14:18,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:14:18,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:14:17" (1/3) ... [2019-11-23 23:14:18,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2749ea98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:14:18, skipping insertion in model container [2019-11-23 23:14:18,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:18" (2/3) ... [2019-11-23 23:14:18,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2749ea98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:14:18, skipping insertion in model container [2019-11-23 23:14:18,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:14:18" (3/3) ... [2019-11-23 23:14:18,743 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2019-11-23 23:14:18,758 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:14:18,765 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:14:18,775 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:14:18,796 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:14:18,797 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:14:18,797 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:14:18,797 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:14:18,797 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:14:18,797 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:14:18,797 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:14:18,797 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:14:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-23 23:14:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:14:18,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:14:18,816 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:14:18,816 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:14:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:14:18,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1167687316, now seen corresponding path program 1 times [2019-11-23 23:14:18,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:14:18,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402939892] [2019-11-23 23:14:18,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:14:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:18,973 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 23:14:18,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402939892] [2019-11-23 23:14:18,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:14:18,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:14:18,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336651362] [2019-11-23 23:14:18,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:14:18,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:14:18,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:14:18,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:14:18,993 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-11-23 23:14:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:14:19,045 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2019-11-23 23:14:19,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:14:19,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:14:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:14:19,058 INFO L225 Difference]: With dead ends: 25 [2019-11-23 23:14:19,058 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:14:19,061 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 23:14:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:14:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:14:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:14:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 23:14:19,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2019-11-23 23:14:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:14:19,094 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 23:14:19,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:14:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 23:14:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:14:19,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:14:19,095 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:14:19,096 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:14:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:14:19,096 INFO L82 PathProgramCache]: Analyzing trace with hash -972732330, now seen corresponding path program 1 times [2019-11-23 23:14:19,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:14:19,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680476570] [2019-11-23 23:14:19,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:14:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:19,170 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 23:14:19,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680476570] [2019-11-23 23:14:19,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654644514] [2019-11-23 23:14:19,175 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 23:14:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:19,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:14:19,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:14:19,262 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 23:14:19,262 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:14:19,285 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 23:14:19,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [624263957] [2019-11-23 23:14:19,316 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:14:19,316 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:14:19,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:14:19,332 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:14:19,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:14:27,504 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 179 [2019-11-23 23:14:27,754 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 182 [2019-11-23 23:14:29,959 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 205 [2019-11-23 23:14:31,173 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2019-11-23 23:14:31,357 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 206 [2019-11-23 23:14:31,520 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2019-11-23 23:14:31,635 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 207 [2019-11-23 23:14:58,356 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 277 [2019-11-23 23:15:00,176 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2019-11-23 23:15:00,307 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 279 [2019-11-23 23:15:02,102 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2019-11-23 23:15:02,250 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 283 [2019-11-23 23:15:03,890 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 287 [2019-11-23 23:15:05,787 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 290 [2019-11-23 23:15:07,678 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 292 [2019-11-23 23:15:11,705 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 300 [2019-11-23 23:15:13,839 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2019-11-23 23:15:13,958 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 303 [2019-11-23 23:15:15,921 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 309 [2019-11-23 23:15:16,045 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 305 [2019-11-23 23:15:16,181 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-23 23:15:16,286 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 308 [2019-11-23 23:15:18,263 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 314 [2019-11-23 23:15:18,391 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 312 [2019-11-23 23:15:20,373 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 317 [2019-11-23 23:15:20,523 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 315 [2019-11-23 23:15:22,880 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-23 23:15:22,999 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 319 [2019-11-23 23:15:25,325 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2019-11-23 23:15:25,463 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 321 [2019-11-23 23:15:25,590 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2019-11-23 23:15:25,709 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 322 [2019-11-23 23:15:25,837 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-23 23:15:25,954 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 326 [2019-11-23 23:15:28,205 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 334 [2019-11-23 23:15:28,369 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 327 [2019-11-23 23:15:28,594 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 328 [2019-11-23 23:15:31,343 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2019-11-23 23:15:31,471 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 332 [2019-11-23 23:15:33,857 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 23:15:33,984 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 336 [2019-11-23 23:15:36,762 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 342 [2019-11-23 23:15:36,999 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 341 [2019-11-23 23:15:39,602 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 23:15:39,749 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 344 [2019-11-23 23:15:42,360 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-23 23:15:42,491 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 347 [2019-11-23 23:15:45,198 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:15:45,347 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 349 [2019-11-23 23:15:45,489 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 23:15:45,638 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 349 [2019-11-23 23:15:45,769 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:15:45,887 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 352 [2019-11-23 23:15:48,679 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2019-11-23 23:15:48,822 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2019-11-23 23:15:51,417 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 360 [2019-11-23 23:15:51,556 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 360