/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/ldv-regression/ex3_forlist.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 03:55:43,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 03:55:43,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 03:55:43,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 03:55:43,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 03:55:43,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 03:55:43,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 03:55:43,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 03:55:43,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 03:55:43,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 03:55:43,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 03:55:43,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 03:55:43,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 03:55:43,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 03:55:43,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 03:55:43,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 03:55:43,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 03:55:43,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 03:55:43,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 03:55:43,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 03:55:43,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 03:55:43,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 03:55:43,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 03:55:43,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 03:55:43,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 03:55:43,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 03:55:43,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 03:55:43,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 03:55:43,623 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 03:55:43,659 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 03:55:43,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 03:55:43,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 03:55:43,660 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 03:55:43,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 03:55:43,660 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 03:55:43,661 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 03:55:43,661 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 03:55:43,661 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 03:55:43,661 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 03:55:43,661 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 03:55:43,661 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 03:55:43,666 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 03:55:43,666 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 03:55:43,666 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 03:55:43,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 03:55:43,667 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 03:55:43,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 03:55:43,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 03:55:43,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 03:55:43,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 03:55:43,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 03:55:43,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 03:55:43,669 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 03:55:43,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 03:55:43,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 03:55:43,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 03:55:43,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 03:55:43,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 03:55:43,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 03:55:43,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 03:55:43,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 03:55:43,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 03:55:43,672 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 03:55:43,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 03:55:43,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 03:55:43,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 03:55:43,673 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 03:55:43,946 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 03:55:43,970 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 03:55:43,973 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 03:55:43,975 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 03:55:43,975 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 03:55:43,976 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/ex3_forlist.i [2019-11-24 03:55:44,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553f595dc/ef39e44add494b7d87980681647d8d8e/FLAGd8ece37de [2019-11-24 03:55:44,509 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 03:55:44,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/ex3_forlist.i [2019-11-24 03:55:44,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553f595dc/ef39e44add494b7d87980681647d8d8e/FLAGd8ece37de [2019-11-24 03:55:44,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553f595dc/ef39e44add494b7d87980681647d8d8e [2019-11-24 03:55:44,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 03:55:44,906 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 03:55:44,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 03:55:44,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 03:55:44,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 03:55:44,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:55:44" (1/1) ... [2019-11-24 03:55:44,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433b84b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:44, skipping insertion in model container [2019-11-24 03:55:44,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:55:44" (1/1) ... [2019-11-24 03:55:44,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 03:55:44,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 03:55:45,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:55:45,145 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 03:55:45,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:55:45,268 INFO L208 MainTranslator]: Completed translation [2019-11-24 03:55:45,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45 WrapperNode [2019-11-24 03:55:45,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 03:55:45,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 03:55:45,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 03:55:45,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 03:55:45,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (1/1) ... [2019-11-24 03:55:45,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (1/1) ... [2019-11-24 03:55:45,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 03:55:45,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 03:55:45,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 03:55:45,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 03:55:45,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (1/1) ... [2019-11-24 03:55:45,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (1/1) ... [2019-11-24 03:55:45,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (1/1) ... [2019-11-24 03:55:45,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (1/1) ... [2019-11-24 03:55:45,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (1/1) ... [2019-11-24 03:55:45,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (1/1) ... [2019-11-24 03:55:45,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (1/1) ... [2019-11-24 03:55:45,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 03:55:45,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 03:55:45,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 03:55:45,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 03:55:45,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (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 03:55:45,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 03:55:45,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 03:55:45,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 03:55:45,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 03:55:45,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 03:55:45,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 03:55:45,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 03:55:45,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 03:55:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 03:55:45,931 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 03:55:45,931 INFO L284 CfgBuilder]: Removed 27 assume(true) statements. [2019-11-24 03:55:45,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:55:45 BoogieIcfgContainer [2019-11-24 03:55:45,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 03:55:45,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 03:55:45,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 03:55:45,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 03:55:45,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 03:55:44" (1/3) ... [2019-11-24 03:55:45,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ccef59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:55:45, skipping insertion in model container [2019-11-24 03:55:45,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:55:45" (2/3) ... [2019-11-24 03:55:45,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ccef59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:55:45, skipping insertion in model container [2019-11-24 03:55:45,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:55:45" (3/3) ... [2019-11-24 03:55:45,941 INFO L109 eAbstractionObserver]: Analyzing ICFG ex3_forlist.i [2019-11-24 03:55:45,951 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 03:55:45,958 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 03:55:45,970 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 03:55:45,993 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 03:55:45,993 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 03:55:45,993 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 03:55:45,993 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 03:55:45,994 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 03:55:45,994 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 03:55:45,994 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 03:55:45,994 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 03:55:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-24 03:55:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 03:55:46,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:55:46,013 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:55:46,014 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:55:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:55:46,019 INFO L82 PathProgramCache]: Analyzing trace with hash -436342068, now seen corresponding path program 1 times [2019-11-24 03:55:46,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:55:46,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733713194] [2019-11-24 03:55:46,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:55:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:55:46,184 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 03:55:46,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733713194] [2019-11-24 03:55:46,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:55:46,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 03:55:46,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956131295] [2019-11-24 03:55:46,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:55:46,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:55:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:55:46,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:55:46,209 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-11-24 03:55:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:55:46,244 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2019-11-24 03:55:46,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:55:46,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-24 03:55:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:55:46,258 INFO L225 Difference]: With dead ends: 49 [2019-11-24 03:55:46,259 INFO L226 Difference]: Without dead ends: 24 [2019-11-24 03:55:46,263 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 [2019-11-24 03:55:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-24 03:55:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-24 03:55:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-24 03:55:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2019-11-24 03:55:46,305 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2019-11-24 03:55:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:55:46,306 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2019-11-24 03:55:46,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:55:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2019-11-24 03:55:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 03:55:46,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:55:46,307 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:55:46,307 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:55:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:55:46,308 INFO L82 PathProgramCache]: Analyzing trace with hash 981906991, now seen corresponding path program 1 times [2019-11-24 03:55:46,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:55:46,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187140663] [2019-11-24 03:55:46,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:55:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:55:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 03:55:46,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187140663] [2019-11-24 03:55:46,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:55:46,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:55:46,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65892585] [2019-11-24 03:55:46,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:55:46,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:55:46,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:55:46,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:55:46,383 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 3 states. [2019-11-24 03:55:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:55:46,458 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2019-11-24 03:55:46,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:55:46,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 03:55:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:55:46,461 INFO L225 Difference]: With dead ends: 62 [2019-11-24 03:55:46,462 INFO L226 Difference]: Without dead ends: 44 [2019-11-24 03:55:46,464 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 03:55:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-24 03:55:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2019-11-24 03:55:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-24 03:55:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2019-11-24 03:55:46,477 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 12 [2019-11-24 03:55:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:55:46,478 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2019-11-24 03:55:46,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:55:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2019-11-24 03:55:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 03:55:46,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:55:46,481 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:55:46,481 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:55:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:55:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1846102906, now seen corresponding path program 1 times [2019-11-24 03:55:46,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:55:46,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086742780] [2019-11-24 03:55:46,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:55:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:55:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:55:46,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086742780] [2019-11-24 03:55:46,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473166980] [2019-11-24 03:55:46,613 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 [2019-11-24 03:55:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:55:46,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 03:55:46,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:55:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:55:46,755 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:55:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:55:46,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064311702] [2019-11-24 03:55:46,831 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-24 03:55:46,835 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:55:46,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:55:46,859 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:55:46,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:55:48,105 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:48,877 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-11-24 03:55:48,899 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:48,920 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:48,942 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:48,964 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:48,983 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:49,004 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:49,072 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:49,210 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:49,213 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 03:55:49,881 WARN L192 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2019-11-24 03:55:50,349 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2019-11-24 03:55:50,854 WARN L192 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 92 [2019-11-24 03:55:51,426 WARN L192 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 100 [2019-11-24 03:55:51,768 WARN L192 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 91 [2019-11-24 03:55:52,114 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2019-11-24 03:55:52,498 WARN L192 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2019-11-24 03:55:52,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 03:55:52,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 11 [2019-11-24 03:55:52,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396598312] [2019-11-24 03:55:52,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-24 03:55:52,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:55:52,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-24 03:55:52,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-24 03:55:52,504 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2019-11-24 03:55:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:55:52,817 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2019-11-24 03:55:52,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 03:55:52,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-24 03:55:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:55:52,819 INFO L225 Difference]: With dead ends: 47 [2019-11-24 03:55:52,819 INFO L226 Difference]: Without dead ends: 26 [2019-11-24 03:55:52,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-24 03:55:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-24 03:55:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-24 03:55:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-24 03:55:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-24 03:55:52,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-11-24 03:55:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:55:52,826 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-24 03:55:52,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-24 03:55:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-24 03:55:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 03:55:52,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:55:52,827 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:55:53,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:55:53,031 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:55:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:55:53,032 INFO L82 PathProgramCache]: Analyzing trace with hash 334766310, now seen corresponding path program 1 times [2019-11-24 03:55:53,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:55:53,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348068011] [2019-11-24 03:55:53,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:55:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:55:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 03:55:53,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348068011] [2019-11-24 03:55:53,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029523476] [2019-11-24 03:55:53,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:55:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:55:53,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 03:55:53,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:55:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 03:55:53,191 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:55:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 03:55:53,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337221908] [2019-11-24 03:55:53,227 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-24 03:55:53,228 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:55:53,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:55:53,228 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:55:53,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:55:54,026 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:54,573 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:54,603 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:54,623 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:54,719 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:54,733 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:54,748 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:54,764 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:55:55,058 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2019-11-24 03:55:55,447 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 03:55:56,025 WARN L192 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2019-11-24 03:55:56,425 WARN L192 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2019-11-24 03:55:56,887 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2019-11-24 03:55:57,328 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 104 [2019-11-24 03:55:57,682 WARN L192 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 95 [2019-11-24 03:55:58,686 WARN L192 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 111 [2019-11-24 03:55:59,794 WARN L192 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 163 DAG size of output: 114 [2019-11-24 03:55:59,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 03:55:59,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 11 [2019-11-24 03:55:59,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873322589] [2019-11-24 03:55:59,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-24 03:55:59,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:55:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-24 03:55:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-24 03:55:59,798 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 9 states. [2019-11-24 03:56:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:56:00,053 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-11-24 03:56:00,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 03:56:00,054 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-24 03:56:00,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:56:00,054 INFO L225 Difference]: With dead ends: 41 [2019-11-24 03:56:00,054 INFO L226 Difference]: Without dead ends: 26 [2019-11-24 03:56:00,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-24 03:56:00,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-24 03:56:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-24 03:56:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-24 03:56:00,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-24 03:56:00,061 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2019-11-24 03:56:00,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:56:00,061 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-24 03:56:00,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-24 03:56:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-24 03:56:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 03:56:00,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:56:00,062 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:56:00,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:00,266 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:56:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:56:00,266 INFO L82 PathProgramCache]: Analyzing trace with hash -872063370, now seen corresponding path program 1 times [2019-11-24 03:56:00,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:56:00,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993000160] [2019-11-24 03:56:00,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:56:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 03:56:00,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993000160] [2019-11-24 03:56:00,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858606405] [2019-11-24 03:56:00,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:00,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 03:56:00,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:56:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 03:56:00,406 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:56:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 03:56:00,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449968982] [2019-11-24 03:56:00,418 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-24 03:56:00,418 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:56:00,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:56:00,419 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:56:00,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:56:01,045 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:01,554 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2019-11-24 03:56:01,578 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:01,598 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:01,615 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:01,673 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:01,687 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:01,701 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:01,717 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:02,028 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:02,083 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:02,368 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 03:56:02,980 WARN L192 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2019-11-24 03:56:03,353 WARN L192 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2019-11-24 03:56:03,766 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 93 [2019-11-24 03:56:04,229 WARN L192 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 101 [2019-11-24 03:56:04,585 WARN L192 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 93 [2019-11-24 03:56:05,672 WARN L192 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 115 [2019-11-24 03:56:06,780 WARN L192 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 166 DAG size of output: 109 [2019-11-24 03:56:07,292 WARN L192 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 95 [2019-11-24 03:56:07,880 WARN L192 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 105 [2019-11-24 03:56:08,529 WARN L192 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 113 [2019-11-24 03:56:09,178 WARN L192 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 111 [2019-11-24 03:56:09,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 03:56:09,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 15 [2019-11-24 03:56:09,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453358361] [2019-11-24 03:56:09,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-24 03:56:09,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:56:09,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-24 03:56:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-11-24 03:56:09,182 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 13 states. [2019-11-24 03:56:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:56:09,544 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2019-11-24 03:56:09,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-24 03:56:09,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-24 03:56:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:56:09,546 INFO L225 Difference]: With dead ends: 44 [2019-11-24 03:56:09,546 INFO L226 Difference]: Without dead ends: 30 [2019-11-24 03:56:09,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-11-24 03:56:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-24 03:56:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-24 03:56:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-24 03:56:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-24 03:56:09,554 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2019-11-24 03:56:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:56:09,554 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-24 03:56:09,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-24 03:56:09,555 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-24 03:56:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 03:56:09,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:56:09,555 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:56:09,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:09,757 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:56:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:56:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1039156958, now seen corresponding path program 1 times [2019-11-24 03:56:09,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:56:09,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644998351] [2019-11-24 03:56:09,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:56:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-24 03:56:09,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644998351] [2019-11-24 03:56:09,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61700718] [2019-11-24 03:56:09,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:09,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 03:56:09,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:56:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-24 03:56:09,904 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:56:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-24 03:56:09,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [540454952] [2019-11-24 03:56:09,917 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 03:56:09,918 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:56:09,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:56:09,918 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:56:09,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:56:10,402 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:11,230 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:11,247 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:11,262 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:11,277 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:11,291 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:11,305 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:11,317 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:11,577 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:11,647 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:12,222 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 03:56:12,769 WARN L192 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2019-11-24 03:56:13,137 WARN L192 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 83 [2019-11-24 03:56:13,531 WARN L192 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2019-11-24 03:56:13,954 WARN L192 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 99 [2019-11-24 03:56:14,291 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 91 [2019-11-24 03:56:15,270 WARN L192 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 105 [2019-11-24 03:56:16,373 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 162 DAG size of output: 107 [2019-11-24 03:56:16,882 WARN L192 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 94 [2019-11-24 03:56:18,492 WARN L192 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 166 DAG size of output: 112 [2019-11-24 03:56:20,085 WARN L192 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 176 DAG size of output: 121 [2019-11-24 03:56:21,087 WARN L192 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 109 [2019-11-24 03:56:21,759 WARN L192 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 105 [2019-11-24 03:56:21,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 03:56:21,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [3, 3, 3] total 16 [2019-11-24 03:56:21,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321070238] [2019-11-24 03:56:21,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-24 03:56:21,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:56:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-24 03:56:21,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2019-11-24 03:56:21,763 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 14 states. [2019-11-24 03:56:22,592 WARN L192 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2019-11-24 03:56:23,166 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2019-11-24 03:56:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:56:23,392 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-24 03:56:23,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-24 03:56:23,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-24 03:56:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:56:23,394 INFO L225 Difference]: With dead ends: 44 [2019-11-24 03:56:23,394 INFO L226 Difference]: Without dead ends: 35 [2019-11-24 03:56:23,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-11-24 03:56:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-24 03:56:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-24 03:56:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-24 03:56:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-24 03:56:23,401 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-11-24 03:56:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:56:23,401 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-24 03:56:23,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-24 03:56:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-24 03:56:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 03:56:23,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:56:23,403 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:56:23,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:23,604 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:56:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:56:23,604 INFO L82 PathProgramCache]: Analyzing trace with hash 980523697, now seen corresponding path program 1 times [2019-11-24 03:56:23,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:56:23,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859921579] [2019-11-24 03:56:23,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:56:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 03:56:23,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859921579] [2019-11-24 03:56:23,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811269890] [2019-11-24 03:56:23,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:23,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 03:56:23,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:56:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 03:56:23,755 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:56:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 03:56:23,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472284406] [2019-11-24 03:56:23,773 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 03:56:23,773 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:56:23,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:56:23,774 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:56:23,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:56:24,307 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:24,860 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:24,985 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:24,999 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:25,012 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:25,022 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:25,035 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:25,046 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:25,275 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:25,332 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:26,071 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2019-11-24 03:56:26,543 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 03:56:27,121 WARN L192 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2019-11-24 03:56:27,511 WARN L192 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2019-11-24 03:56:27,995 WARN L192 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 93 [2019-11-24 03:56:28,437 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 102 [2019-11-24 03:56:28,766 WARN L192 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 91 [2019-11-24 03:56:29,832 WARN L192 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 110 [2019-11-24 03:56:30,945 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 166 DAG size of output: 112 [2019-11-24 03:56:31,437 WARN L192 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 95 [2019-11-24 03:56:33,058 WARN L192 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 192 DAG size of output: 123 [2019-11-24 03:56:34,723 WARN L192 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 201 DAG size of output: 133 [2019-11-24 03:56:35,984 WARN L192 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 203 DAG size of output: 112 [2019-11-24 03:56:37,529 WARN L192 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 183 DAG size of output: 114 [2019-11-24 03:56:37,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 03:56:37,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [5, 3, 3] total 19 [2019-11-24 03:56:37,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026882645] [2019-11-24 03:56:37,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-24 03:56:37,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:56:37,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-24 03:56:37,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-11-24 03:56:37,533 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 14 states. [2019-11-24 03:56:38,396 WARN L192 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 106 [2019-11-24 03:56:38,995 WARN L192 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2019-11-24 03:56:39,867 WARN L192 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 105 [2019-11-24 03:56:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:56:40,009 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-11-24 03:56:40,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-24 03:56:40,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-11-24 03:56:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:56:40,011 INFO L225 Difference]: With dead ends: 34 [2019-11-24 03:56:40,011 INFO L226 Difference]: Without dead ends: 32 [2019-11-24 03:56:40,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-24 03:56:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-24 03:56:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-24 03:56:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-24 03:56:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-11-24 03:56:40,019 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 24 [2019-11-24 03:56:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:56:40,019 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-11-24 03:56:40,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-24 03:56:40,020 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-11-24 03:56:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 03:56:40,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:56:40,020 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:56:40,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:40,224 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:56:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:56:40,224 INFO L82 PathProgramCache]: Analyzing trace with hash 392321761, now seen corresponding path program 1 times [2019-11-24 03:56:40,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:56:40,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381535245] [2019-11-24 03:56:40,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:56:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-24 03:56:40,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381535245] [2019-11-24 03:56:40,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832336798] [2019-11-24 03:56:40,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:40,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 03:56:40,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:56:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-24 03:56:40,358 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:56:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-24 03:56:40,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362481447] [2019-11-24 03:56:40,380 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-24 03:56:40,380 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:56:40,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:56:40,380 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:56:40,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:56:41,013 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:41,414 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:41,430 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:41,442 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:41,454 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:41,467 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:41,522 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:41,533 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:41,840 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:41,856 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:42,945 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 03:56:43,462 WARN L192 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 85 [2019-11-24 03:56:43,919 WARN L192 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2019-11-24 03:56:44,359 WARN L192 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2019-11-24 03:56:44,848 WARN L192 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 105 [2019-11-24 03:56:45,194 WARN L192 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 94 [2019-11-24 03:56:46,185 WARN L192 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 99 [2019-11-24 03:56:47,330 WARN L192 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 161 DAG size of output: 111 [2019-11-24 03:56:47,819 WARN L192 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 94 [2019-11-24 03:56:50,122 WARN L192 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2019-11-24 03:56:51,748 WARN L192 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 196 DAG size of output: 130 [2019-11-24 03:56:52,968 WARN L192 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 198 DAG size of output: 112 [2019-11-24 03:56:54,480 WARN L192 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 182 DAG size of output: 112 [2019-11-24 03:56:55,095 WARN L192 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 105 [2019-11-24 03:56:55,753 WARN L192 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 113 [2019-11-24 03:56:55,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 03:56:55,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [3, 3, 3] total 18 [2019-11-24 03:56:55,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046866540] [2019-11-24 03:56:55,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-24 03:56:55,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:56:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-24 03:56:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2019-11-24 03:56:55,756 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 16 states. [2019-11-24 03:56:56,618 WARN L192 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 105 [2019-11-24 03:56:57,237 WARN L192 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 113 [2019-11-24 03:56:58,071 WARN L192 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 103 [2019-11-24 03:56:58,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:56:58,236 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-11-24 03:56:58,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-24 03:56:58,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2019-11-24 03:56:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:56:58,238 INFO L225 Difference]: With dead ends: 42 [2019-11-24 03:56:58,238 INFO L226 Difference]: Without dead ends: 35 [2019-11-24 03:56:58,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2019-11-24 03:56:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-24 03:56:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-24 03:56:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-24 03:56:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-24 03:56:58,247 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 25 [2019-11-24 03:56:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:56:58,247 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-24 03:56:58,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-24 03:56:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-24 03:56:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-24 03:56:58,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:56:58,248 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:56:58,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:58,452 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:56:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:56:58,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1432789232, now seen corresponding path program 1 times [2019-11-24 03:56:58,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:56:58,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498429554] [2019-11-24 03:56:58,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:56:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 03:56:58,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498429554] [2019-11-24 03:56:58,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880151670] [2019-11-24 03:56:58,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:56:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:56:58,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 03:56:58,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:56:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 03:56:58,587 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:56:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 03:56:58,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1655639420] [2019-11-24 03:56:58,605 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-24 03:56:58,605 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:56:58,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:56:58,606 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:56:58,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:56:59,190 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:59,663 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:59,682 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:59,738 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:59,752 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:59,765 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:59,778 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:56:59,790 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:57:00,023 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:57:00,039 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:57:01,210 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 03:57:01,757 WARN L192 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2019-11-24 03:57:02,114 WARN L192 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2019-11-24 03:57:02,557 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2019-11-24 03:57:02,996 WARN L192 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 104 [2019-11-24 03:57:03,331 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 95 [2019-11-24 03:57:04,323 WARN L192 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 115 [2019-11-24 03:57:05,378 WARN L192 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 116 [2019-11-24 03:57:05,878 WARN L192 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 97 [2019-11-24 03:57:07,463 WARN L192 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 195 DAG size of output: 130 [2019-11-24 03:57:09,173 WARN L192 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 204 DAG size of output: 139 [2019-11-24 03:57:10,215 WARN L192 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 112 [2019-11-24 03:57:11,695 WARN L192 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 184 DAG size of output: 120 [2019-11-24 03:57:13,410 WARN L192 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 196 DAG size of output: 110 [2019-11-24 03:57:15,030 WARN L192 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 192 DAG size of output: 116 [2019-11-24 03:57:16,389 WARN L192 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 193 DAG size of output: 115