/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_init1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:07:46,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:07:46,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:07:46,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:07:46,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:07:46,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:07:46,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:07:46,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:07:46,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:07:46,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:07:46,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:07:46,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:07:46,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:07:46,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:07:46,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:07:46,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:07:46,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:07:46,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:07:46,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:07:46,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:07:46,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:07:46,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:07:46,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:07:46,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:07:46,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:07:46,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:07:46,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:07:46,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:07:46,143 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 23:07:46,162 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:07:46,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:07:46,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:07:46,164 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:07:46,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:07:46,164 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:07:46,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:07:46,165 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:07:46,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:07:46,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:07:46,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:07:46,166 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:07:46,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:07:46,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:07:46,167 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:07:46,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:07:46,169 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:07:46,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:07:46,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:07:46,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:07:46,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:07:46,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:07:46,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:07:46,170 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:07:46,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:07:46,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:07:46,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:07:46,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:07:46,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:07:46,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:07:46,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:07:46,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:07:46,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:07:46,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:07:46,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:07:46,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:07:46,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:07:46,175 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:07:46,435 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:07:46,454 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:07:46,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:07:46,460 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:07:46,460 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:07:46,461 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2019-11-23 23:07:46,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40745109f/c789c3bf7667498f8c1d84ca3fe4e371/FLAG49bfd5487 [2019-11-23 23:07:46,985 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:07:46,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2019-11-23 23:07:46,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40745109f/c789c3bf7667498f8c1d84ca3fe4e371/FLAG49bfd5487 [2019-11-23 23:07:47,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40745109f/c789c3bf7667498f8c1d84ca3fe4e371 [2019-11-23 23:07:47,404 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:07:47,405 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:07:47,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:07:47,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:07:47,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:07:47,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32876bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47, skipping insertion in model container [2019-11-23 23:07:47,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:07:47,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:07:47,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:07:47,611 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:07:47,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:07:47,644 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:07:47,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47 WrapperNode [2019-11-23 23:07:47,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:07:47,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:07:47,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:07:47,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:07:47,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:07:47,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:07:47,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:07:47,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:07:47,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (1/1) ... [2019-11-23 23:07:47,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:07:47,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:07:47,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:07:47,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:07:47,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (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 23:07:47,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:07:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:07:47,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:07:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:07:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:07:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:07:48,167 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:07:48,168 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 23:07:48,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:07:48 BoogieIcfgContainer [2019-11-23 23:07:48,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:07:48,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:07:48,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:07:48,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:07:48,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:07:47" (1/3) ... [2019-11-23 23:07:48,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6567e973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:07:48, skipping insertion in model container [2019-11-23 23:07:48,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:47" (2/3) ... [2019-11-23 23:07:48,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6567e973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:07:48, skipping insertion in model container [2019-11-23 23:07:48,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:07:48" (3/3) ... [2019-11-23 23:07:48,176 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-1.i [2019-11-23 23:07:48,184 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:07:48,191 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:07:48,201 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:07:48,221 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:07:48,221 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:07:48,221 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:07:48,221 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:07:48,221 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:07:48,221 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:07:48,222 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:07:48,222 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:07:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-11-23 23:07:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 23:07:48,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:07:48,242 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 23:07:48,242 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:07:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:07:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash 69853041, now seen corresponding path program 1 times [2019-11-23 23:07:48,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:07:48,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798900859] [2019-11-23 23:07:48,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:07:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:07:48,408 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 23:07:48,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798900859] [2019-11-23 23:07:48,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:07:48,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:07:48,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502064105] [2019-11-23 23:07:48,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:07:48,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:07:48,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:07:48,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:07:48,438 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-11-23 23:07:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:07:48,476 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-11-23 23:07:48,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:07:48,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-23 23:07:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:07:48,490 INFO L225 Difference]: With dead ends: 15 [2019-11-23 23:07:48,491 INFO L226 Difference]: Without dead ends: 8 [2019-11-23 23:07:48,494 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 23:07:48,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-23 23:07:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-23 23:07:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-23 23:07:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-23 23:07:48,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-23 23:07:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:07:48,535 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-23 23:07:48,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:07:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-23 23:07:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:07:48,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:07:48,537 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:07:48,538 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:07:48,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:07:48,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2130228392, now seen corresponding path program 1 times [2019-11-23 23:07:48,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:07:48,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52150522] [2019-11-23 23:07:48,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:07:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:07:48,618 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 23:07:48,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52150522] [2019-11-23 23:07:48,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735349832] [2019-11-23 23:07:48,620 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 23:07:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:07:48,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:07:48,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:07:48,737 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 23:07:48,738 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:07:48,766 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 23:07:48,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821705764] [2019-11-23 23:07:48,796 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-23 23:07:48,796 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:07:48,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:07:48,822 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:07:48,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:07:59,470 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 169 [2019-11-23 23:08:23,355 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2019-11-23 23:08:23,494 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 259 [2019-11-23 23:08:28,848 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 270 [2019-11-23 23:08:55,494 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 315 [2019-11-23 23:08:57,834 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 319 [2019-11-23 23:09:00,048 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 327 [2019-11-23 23:09:02,479 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 328 [2019-11-23 23:09:02,591 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 326 [2019-11-23 23:09:07,598 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 335 [2019-11-23 23:09:10,332 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2019-11-23 23:09:13,135 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 344 [2019-11-23 23:09:13,580 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 347 [2019-11-23 23:09:16,220 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:09:16,330 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 351 [2019-11-23 23:09:19,089 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 354