/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_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:11:00,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:11:00,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:11:00,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:11:00,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:11:00,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:11:00,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:11:00,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:11:00,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:11:00,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:11:00,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:11:00,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:11:00,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:11:00,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:11:00,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:11:00,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:11:00,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:11:00,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:11:00,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:11:00,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:11:00,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:11:00,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:11:00,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:11:00,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:11:00,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:11:00,794 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 23:11:00,818 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:11:00,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:11:00,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:11:00,819 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:11:00,819 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:11:00,820 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:11:00,820 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:11:00,820 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:11:00,820 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:11:00,820 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:11:00,821 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:11:00,822 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:11:00,822 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:11:00,822 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:11:00,822 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:11:00,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:11:00,824 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:11:00,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:11:00,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:11:00,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:11:00,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:11:00,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:11:00,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:11:00,825 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:11:00,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:11:00,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:11:00,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:11:00,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:11:00,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:11:00,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:11:00,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:11:00,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:11:00,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:11:00,828 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:11:00,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:11:00,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:11:00,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:11:00,829 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:11:01,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:11:01,124 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:11:01,127 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:11:01,129 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:11:01,129 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:11:01,130 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-11-23 23:11:01,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8f4801c/af468d61c3d5405e992660de837048f5/FLAGb7c383815 [2019-11-23 23:11:01,654 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:11:01,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-11-23 23:11:01,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8f4801c/af468d61c3d5405e992660de837048f5/FLAGb7c383815 [2019-11-23 23:11:02,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8f4801c/af468d61c3d5405e992660de837048f5 [2019-11-23 23:11:02,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:11:02,050 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:11:02,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:11:02,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:11:02,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:11:02,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1bdec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02, skipping insertion in model container [2019-11-23 23:11:02,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:11:02,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:11:02,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:11:02,353 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:11:02,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:11:02,427 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:11:02,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02 WrapperNode [2019-11-23 23:11:02,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:11:02,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:11:02,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:11:02,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:11:02,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:11:02,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:11:02,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:11:02,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:11:02,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (1/1) ... [2019-11-23 23:11:02,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:11:02,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:11:02,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:11:02,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:11:02,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (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 23:11:02,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:11:02,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:11:02,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:11:02,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:11:02,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:11:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:11:03,157 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:11:03,159 INFO L284 CfgBuilder]: Removed 16 assume(true) statements. [2019-11-23 23:11:03,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:11:03 BoogieIcfgContainer [2019-11-23 23:11:03,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:11:03,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:11:03,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:11:03,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:11:03,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:11:02" (1/3) ... [2019-11-23 23:11:03,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6208cd51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:11:03, skipping insertion in model container [2019-11-23 23:11:03,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:02" (2/3) ... [2019-11-23 23:11:03,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6208cd51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:11:03, skipping insertion in model container [2019-11-23 23:11:03,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:11:03" (3/3) ... [2019-11-23 23:11:03,168 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2019-11-23 23:11:03,176 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:11:03,183 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:11:03,195 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:11:03,216 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:11:03,216 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:11:03,217 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:11:03,217 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:11:03,217 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:11:03,217 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:11:03,217 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:11:03,217 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:11:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 23:11:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 23:11:03,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:11:03,237 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:11:03,238 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:11:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:11:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash -276988719, now seen corresponding path program 1 times [2019-11-23 23:11:03,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:11:03,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142702723] [2019-11-23 23:11:03,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:11:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:11:03,403 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 23:11:03,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142702723] [2019-11-23 23:11:03,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:11:03,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:11:03,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256821382] [2019-11-23 23:11:03,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:11:03,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:11:03,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:11:03,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:11:03,431 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-11-23 23:11:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:11:03,589 INFO L93 Difference]: Finished difference Result 39 states and 67 transitions. [2019-11-23 23:11:03,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:11:03,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-23 23:11:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:11:03,604 INFO L225 Difference]: With dead ends: 39 [2019-11-23 23:11:03,604 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 23:11:03,611 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 23:11:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 23:11:03,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 23:11:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 23:11:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2019-11-23 23:11:03,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 13 [2019-11-23 23:11:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:11:03,670 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-23 23:11:03,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:11:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2019-11-23 23:11:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 23:11:03,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:11:03,673 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:11:03,673 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:11:03,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:11:03,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1735098540, now seen corresponding path program 1 times [2019-11-23 23:11:03,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:11:03,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040029821] [2019-11-23 23:11:03,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:11:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:11:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 23:11:03,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040029821] [2019-11-23 23:11:03,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342080861] [2019-11-23 23:11:03,815 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 23:11:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:11:03,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:11:03,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:11:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 23:11:03,942 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:11:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 23:11:03,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321663380] [2019-11-23 23:11:04,009 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-23 23:11:04,009 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:11:04,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:11:04,052 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:11:04,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:12:00,325 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 297 [2019-11-23 23:12:05,134 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-11-23 23:12:05,279 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 303 [2019-11-23 23:12:05,407 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2019-11-23 23:12:05,542 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 306 [2019-11-23 23:12:14,396 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 319 [2019-11-23 23:12:22,085 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 337 [2019-11-23 23:12:28,046 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 349 [2019-11-23 23:12:28,271 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 351 [2019-11-23 23:12:31,350 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 359 [2019-11-23 23:12:34,148 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2019-11-23 23:12:34,265 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 362