/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/product-lines/elevator_spec14_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:35:29,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:35:29,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:35:29,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:35:29,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:35:29,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:35:29,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:35:29,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:35:29,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:35:29,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:35:29,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:35:29,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:35:29,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:35:29,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:35:29,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:35:29,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:35:29,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:35:29,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:35:29,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:35:29,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:35:29,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:35:29,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:35:29,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:35:29,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:35:29,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:35:29,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:35:29,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:35:29,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:35:29,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:35:29,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:35:29,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:35:29,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:35:29,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:35:29,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:35:29,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:35:29,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:35:29,213 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 [2019-11-24 04:35:29,235 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:35:29,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:35:29,236 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:35:29,236 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:35:29,236 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:35:29,237 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:35:29,237 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:35:29,237 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:35:29,237 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:35:29,237 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:35:29,238 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:35:29,239 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:35:29,239 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:35:29,239 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:35:29,240 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:35:29,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:35:29,241 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:35:29,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:35:29,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:35:29,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:35:29,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:35:29,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:35:29,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:35:29,242 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:35:29,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:35:29,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:35:29,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:35:29,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:35:29,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:35:29,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:35:29,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:35:29,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:35:29,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:35:29,245 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:35:29,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:35:29,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:35:29,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:35:29,246 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:35:29,519 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:35:29,535 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:35:29,540 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:35:29,541 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:35:29,542 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:35:29,542 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product19.cil.c [2019-11-24 04:35:29,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d68e9bab/fd30118fb9e3405a917adad74390b459/FLAGa2bc9654c [2019-11-24 04:35:30,220 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:35:30,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product19.cil.c [2019-11-24 04:35:30,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d68e9bab/fd30118fb9e3405a917adad74390b459/FLAGa2bc9654c [2019-11-24 04:35:30,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d68e9bab/fd30118fb9e3405a917adad74390b459 [2019-11-24 04:35:30,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:35:30,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:35:30,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:35:30,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:35:30,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:35:30,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:30,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f203c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30, skipping insertion in model container [2019-11-24 04:35:30,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:30,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:35:30,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:35:31,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:35:31,270 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:35:31,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:35:31,472 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:35:31,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31 WrapperNode [2019-11-24 04:35:31,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:35:31,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:35:31,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:35:31,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:35:31,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (1/1) ... [2019-11-24 04:35:31,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (1/1) ... [2019-11-24 04:35:31,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:35:31,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:35:31,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:35:31,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:35:31,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (1/1) ... [2019-11-24 04:35:31,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (1/1) ... [2019-11-24 04:35:31,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (1/1) ... [2019-11-24 04:35:31,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (1/1) ... [2019-11-24 04:35:32,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (1/1) ... [2019-11-24 04:35:32,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (1/1) ... [2019-11-24 04:35:32,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (1/1) ... [2019-11-24 04:35:32,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:35:32,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:35:32,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:35:32,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:35:32,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (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 [2019-11-24 04:35:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:35:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:35:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:35:32,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:36:27,845 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:36:27,846 INFO L284 CfgBuilder]: Removed 1383 assume(true) statements. [2019-11-24 04:36:27,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:36:27 BoogieIcfgContainer [2019-11-24 04:36:27,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:36:27,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:36:27,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:36:27,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:36:27,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:35:30" (1/3) ... [2019-11-24 04:36:27,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35505b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:36:27, skipping insertion in model container [2019-11-24 04:36:27,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:31" (2/3) ... [2019-11-24 04:36:27,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35505b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:36:27, skipping insertion in model container [2019-11-24 04:36:27,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:36:27" (3/3) ... [2019-11-24 04:36:27,857 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product19.cil.c [2019-11-24 04:36:27,867 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:36:27,877 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-24 04:36:27,889 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-24 04:36:27,932 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:36:27,932 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:36:27,932 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:36:27,933 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:36:27,933 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:36:27,933 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:36:27,933 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:36:27,934 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:36:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states. [2019-11-24 04:36:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:36:27,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:27,983 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:27,984 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:36:27,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1735619278, now seen corresponding path program 1 times [2019-11-24 04:36:27,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:28,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803820419] [2019-11-24 04:36:28,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:36:28,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803820419] [2019-11-24 04:36:28,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:28,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:36:28,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437961827] [2019-11-24 04:36:28,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:36:28,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:28,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:36:28,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:36:28,561 INFO L87 Difference]: Start difference. First operand 1783 states. Second operand 5 states. [2019-11-24 04:36:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:29,640 INFO L93 Difference]: Finished difference Result 4673 states and 9003 transitions. [2019-11-24 04:36:29,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:36:29,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-24 04:36:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:29,693 INFO L225 Difference]: With dead ends: 4673 [2019-11-24 04:36:29,693 INFO L226 Difference]: Without dead ends: 3236 [2019-11-24 04:36:29,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:36:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2019-11-24 04:36:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 1801. [2019-11-24 04:36:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2019-11-24 04:36:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 3461 transitions. [2019-11-24 04:36:29,892 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 3461 transitions. Word has length 11 [2019-11-24 04:36:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:29,893 INFO L462 AbstractCegarLoop]: Abstraction has 1801 states and 3461 transitions. [2019-11-24 04:36:29,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:36:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 3461 transitions. [2019-11-24 04:36:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-24 04:36:29,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:29,906 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, 1, 1, 1, 1] [2019-11-24 04:36:29,907 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:36:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash -319960129, now seen corresponding path program 1 times [2019-11-24 04:36:29,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:29,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028756961] [2019-11-24 04:36:29,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:36:30,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028756961] [2019-11-24 04:36:30,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:30,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:36:30,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068800619] [2019-11-24 04:36:30,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:36:30,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:36:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:36:30,216 INFO L87 Difference]: Start difference. First operand 1801 states and 3461 transitions. Second operand 4 states. [2019-11-24 04:36:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:32,900 INFO L93 Difference]: Finished difference Result 3936 states and 7546 transitions. [2019-11-24 04:36:32,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:36:32,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-11-24 04:36:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:32,918 INFO L225 Difference]: With dead ends: 3936 [2019-11-24 04:36:32,918 INFO L226 Difference]: Without dead ends: 2340 [2019-11-24 04:36:32,922 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 [2019-11-24 04:36:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2019-11-24 04:36:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 1801. [2019-11-24 04:36:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2019-11-24 04:36:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 3336 transitions. [2019-11-24 04:36:35,464 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 3336 transitions. Word has length 26 [2019-11-24 04:36:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:35,464 INFO L462 AbstractCegarLoop]: Abstraction has 1801 states and 3336 transitions. [2019-11-24 04:36:35,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:36:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 3336 transitions. [2019-11-24 04:36:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-24 04:36:35,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:35,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:35,469 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:36:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:35,470 INFO L82 PathProgramCache]: Analyzing trace with hash 111334048, now seen corresponding path program 1 times [2019-11-24 04:36:35,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:35,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7127505] [2019-11-24 04:36:35,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:36:35,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7127505] [2019-11-24 04:36:35,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:35,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:36:35,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877565102] [2019-11-24 04:36:35,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:36:35,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:35,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:36:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:36:35,701 INFO L87 Difference]: Start difference. First operand 1801 states and 3336 transitions. Second operand 3 states. [2019-11-24 04:36:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:37,996 INFO L93 Difference]: Finished difference Result 3885 states and 7170 transitions. [2019-11-24 04:36:37,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:36:37,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-24 04:36:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:38,012 INFO L225 Difference]: With dead ends: 3885 [2019-11-24 04:36:38,021 INFO L226 Difference]: Without dead ends: 2310 [2019-11-24 04:36:38,025 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 [2019-11-24 04:36:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2019-11-24 04:36:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1726. [2019-11-24 04:36:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2019-11-24 04:36:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3136 transitions. [2019-11-24 04:36:38,093 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3136 transitions. Word has length 31 [2019-11-24 04:36:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:38,094 INFO L462 AbstractCegarLoop]: Abstraction has 1726 states and 3136 transitions. [2019-11-24 04:36:38,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:36:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3136 transitions. [2019-11-24 04:36:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-24 04:36:38,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:38,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:38,098 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:36:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash 110793457, now seen corresponding path program 1 times [2019-11-24 04:36:38,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:38,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943157921] [2019-11-24 04:36:38,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:36:38,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943157921] [2019-11-24 04:36:38,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:38,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:36:38,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606965367] [2019-11-24 04:36:38,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:36:38,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:36:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:36:38,420 INFO L87 Difference]: Start difference. First operand 1726 states and 3136 transitions. Second operand 3 states. [2019-11-24 04:36:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:40,402 INFO L93 Difference]: Finished difference Result 3728 states and 6778 transitions. [2019-11-24 04:36:40,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:36:40,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-24 04:36:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:40,415 INFO L225 Difference]: With dead ends: 3728 [2019-11-24 04:36:40,415 INFO L226 Difference]: Without dead ends: 2255 [2019-11-24 04:36:40,418 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 [2019-11-24 04:36:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2019-11-24 04:36:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1676. [2019-11-24 04:36:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2019-11-24 04:36:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2961 transitions. [2019-11-24 04:36:40,479 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2961 transitions. Word has length 32 [2019-11-24 04:36:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:40,479 INFO L462 AbstractCegarLoop]: Abstraction has 1676 states and 2961 transitions. [2019-11-24 04:36:40,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:36:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2961 transitions. [2019-11-24 04:36:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-24 04:36:40,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:40,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:40,483 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:36:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1491734646, now seen corresponding path program 1 times [2019-11-24 04:36:40,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:40,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442676927] [2019-11-24 04:36:40,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:36:40,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442676927] [2019-11-24 04:36:40,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:40,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:36:40,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302177672] [2019-11-24 04:36:40,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:36:40,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:40,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:36:40,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:36:40,725 INFO L87 Difference]: Start difference. First operand 1676 states and 2961 transitions. Second operand 3 states. [2019-11-24 04:36:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:43,126 INFO L93 Difference]: Finished difference Result 3616 states and 6431 transitions. [2019-11-24 04:36:43,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:36:43,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-24 04:36:43,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:43,145 INFO L225 Difference]: With dead ends: 3616 [2019-11-24 04:36:43,145 INFO L226 Difference]: Without dead ends: 2225 [2019-11-24 04:36:43,148 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 [2019-11-24 04:36:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2019-11-24 04:36:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1651. [2019-11-24 04:36:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1651 states. [2019-11-24 04:36:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2811 transitions. [2019-11-24 04:36:43,208 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2811 transitions. Word has length 34 [2019-11-24 04:36:43,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:43,210 INFO L462 AbstractCegarLoop]: Abstraction has 1651 states and 2811 transitions. [2019-11-24 04:36:43,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:36:43,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2811 transitions. [2019-11-24 04:36:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-24 04:36:43,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:43,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:43,217 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:36:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1717797180, now seen corresponding path program 1 times [2019-11-24 04:36:43,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:43,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650772779] [2019-11-24 04:36:43,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:36:43,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650772779] [2019-11-24 04:36:43,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:43,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:36:43,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926519396] [2019-11-24 04:36:43,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:36:43,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:43,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:36:43,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:36:43,486 INFO L87 Difference]: Start difference. First operand 1651 states and 2811 transitions. Second operand 3 states. [2019-11-24 04:36:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:45,223 INFO L93 Difference]: Finished difference Result 3519 states and 6089 transitions. [2019-11-24 04:36:45,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:36:45,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-24 04:36:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:45,239 INFO L225 Difference]: With dead ends: 3519 [2019-11-24 04:36:45,239 INFO L226 Difference]: Without dead ends: 2190 [2019-11-24 04:36:45,243 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 [2019-11-24 04:36:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2019-11-24 04:36:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1651. [2019-11-24 04:36:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1651 states. [2019-11-24 04:36:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2686 transitions. [2019-11-24 04:36:45,303 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2686 transitions. Word has length 37 [2019-11-24 04:36:45,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:45,305 INFO L462 AbstractCegarLoop]: Abstraction has 1651 states and 2686 transitions. [2019-11-24 04:36:45,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:36:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2686 transitions. [2019-11-24 04:36:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-24 04:36:45,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:45,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:45,317 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:36:45,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash 601405682, now seen corresponding path program 1 times [2019-11-24 04:36:45,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:45,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694756987] [2019-11-24 04:36:45,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:36:45,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694756987] [2019-11-24 04:36:45,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:45,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:36:45,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141901832] [2019-11-24 04:36:45,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:36:45,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:45,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:36:45,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:36:45,620 INFO L87 Difference]: Start difference. First operand 1651 states and 2686 transitions. Second operand 5 states.