/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/list-simple/sll2n_append_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:11:55,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:11:55,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:11:55,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:11:55,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:11:55,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:11:55,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:11:55,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:11:55,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:11:55,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:11:55,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:11:55,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:11:55,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:11:55,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:11:55,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:11:55,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:11:55,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:11:55,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:11:55,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:11:55,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:11:55,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:11:55,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:11:55,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:11:55,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:11:55,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:11:55,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:11:55,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:11:55,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:11:55,619 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 04:11:55,633 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:11:55,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:11:55,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:11:55,635 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:11:55,635 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:11:55,635 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:11:55,636 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:11:55,636 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:11:55,636 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:11:55,636 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:11:55,636 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:11:55,636 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:11:55,637 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:11:55,637 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:11:55,637 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:11:55,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:11:55,638 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:11:55,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:11:55,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:11:55,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:11:55,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:11:55,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:11:55,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:11:55,639 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:11:55,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:11:55,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:11:55,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:11:55,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:11:55,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:11:55,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:11:55,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:11:55,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:11:55,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:11:55,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:11:55,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:11:55,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:11:55,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:11:55,642 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:11:55,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:11:55,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:11:55,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:11:55,943 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:11:55,943 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:11:55,944 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2019-11-24 04:11:56,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d1e08110/9ca8fef109564cb69dae80500613101a/FLAG20abfddf5 [2019-11-24 04:11:56,533 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:11:56,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2019-11-24 04:11:56,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d1e08110/9ca8fef109564cb69dae80500613101a/FLAG20abfddf5 [2019-11-24 04:11:56,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d1e08110/9ca8fef109564cb69dae80500613101a [2019-11-24 04:11:56,895 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:11:56,896 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:11:56,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:11:56,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:11:56,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:11:56,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:11:56" (1/1) ... [2019-11-24 04:11:56,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ba606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:56, skipping insertion in model container [2019-11-24 04:11:56,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:11:56" (1/1) ... [2019-11-24 04:11:56,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:11:56,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:11:57,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:11:57,414 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:11:57,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:11:57,520 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:11:57,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57 WrapperNode [2019-11-24 04:11:57,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:11:57,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:11:57,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:11:57,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:11:57,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (1/1) ... [2019-11-24 04:11:57,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (1/1) ... [2019-11-24 04:11:57,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:11:57,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:11:57,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:11:57,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:11:57,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (1/1) ... [2019-11-24 04:11:57,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (1/1) ... [2019-11-24 04:11:57,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (1/1) ... [2019-11-24 04:11:57,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (1/1) ... [2019-11-24 04:11:57,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (1/1) ... [2019-11-24 04:11:57,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (1/1) ... [2019-11-24 04:11:57,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (1/1) ... [2019-11-24 04:11:57,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:11:57,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:11:57,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:11:57,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:11:57,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (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 04:11:57,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:11:57,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:11:57,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:11:57,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:11:57,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:11:57,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:11:57,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:11:57,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:11:57,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:11:57,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:11:58,277 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:11:58,278 INFO L284 CfgBuilder]: Removed 22 assume(true) statements. [2019-11-24 04:11:58,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:11:58 BoogieIcfgContainer [2019-11-24 04:11:58,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:11:58,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:11:58,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:11:58,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:11:58,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:11:56" (1/3) ... [2019-11-24 04:11:58,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca3492d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:11:58, skipping insertion in model container [2019-11-24 04:11:58,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:57" (2/3) ... [2019-11-24 04:11:58,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca3492d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:11:58, skipping insertion in model container [2019-11-24 04:11:58,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:11:58" (3/3) ... [2019-11-24 04:11:58,289 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2019-11-24 04:11:58,299 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:11:58,307 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:11:58,319 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:11:58,346 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:11:58,347 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:11:58,347 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:11:58,347 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:11:58,347 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:11:58,348 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:11:58,348 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:11:58,348 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:11:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-24 04:11:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:11:58,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:11:58,372 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:11:58,373 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:11:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:11:58,380 INFO L82 PathProgramCache]: Analyzing trace with hash 461949994, now seen corresponding path program 1 times [2019-11-24 04:11:58,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:11:58,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591739041] [2019-11-24 04:11:58,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:11:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:11:58,561 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 04:11:58,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591739041] [2019-11-24 04:11:58,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:11:58,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:11:58,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224135741] [2019-11-24 04:11:58,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:11:58,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:11:58,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:11:58,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:11:58,587 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-24 04:11:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:11:58,631 INFO L93 Difference]: Finished difference Result 45 states and 69 transitions. [2019-11-24 04:11:58,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:11:58,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:11:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:11:58,644 INFO L225 Difference]: With dead ends: 45 [2019-11-24 04:11:58,644 INFO L226 Difference]: Without dead ends: 20 [2019-11-24 04:11:58,648 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 04:11:58,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-24 04:11:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-24 04:11:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:11:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-24 04:11:58,688 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2019-11-24 04:11:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:11:58,688 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-24 04:11:58,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:11:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2019-11-24 04:11:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:11:58,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:11:58,690 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:11:58,690 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:11:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:11:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash -72538535, now seen corresponding path program 1 times [2019-11-24 04:11:58,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:11:58,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058559182] [2019-11-24 04:11:58,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:11:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:11:58,789 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 04:11:58,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058559182] [2019-11-24 04:11:58,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160847391] [2019-11-24 04:11:58,790 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 04:11:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:11:58,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:11:58,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:11:58,979 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 04:11:58,979 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:11:59,000 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 04:11:59,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576666132] [2019-11-24 04:11:59,025 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 04:11:59,026 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:11:59,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:11:59,039 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:11:59,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:11:59,359 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:59,833 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:59,981 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2019-11-24 04:12:00,641 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:01,128 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:01,231 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:02,029 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:02,772 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:02,825 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:03,144 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:03,338 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:03,340 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:12:04,512 WARN L192 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 138 DAG size of output: 107 [2019-11-24 04:12:05,150 WARN L192 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 96 [2019-11-24 04:12:05,767 WARN L192 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 121 [2019-11-24 04:12:06,480 WARN L192 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 143 [2019-11-24 04:12:06,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:12:06,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2019-11-24 04:12:06,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104586564] [2019-11-24 04:12:06,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:12:06,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:12:06,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:12:06,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:12:06,487 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 6 states. [2019-11-24 04:12:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:12:06,677 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-24 04:12:06,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:12:06,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-24 04:12:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:12:06,678 INFO L225 Difference]: With dead ends: 29 [2019-11-24 04:12:06,678 INFO L226 Difference]: Without dead ends: 19 [2019-11-24 04:12:06,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:12:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-24 04:12:06,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-24 04:12:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:12:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-24 04:12:06,689 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-11-24 04:12:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:12:06,689 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-24 04:12:06,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:12:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-24 04:12:06,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:12:06,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:12:06,691 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:12:06,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:12:06,897 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:12:06,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:12:06,898 INFO L82 PathProgramCache]: Analyzing trace with hash 593064631, now seen corresponding path program 1 times [2019-11-24 04:12:06,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:12:06,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346569671] [2019-11-24 04:12:06,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:12:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:06,996 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 04:12:06,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346569671] [2019-11-24 04:12:06,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121084530] [2019-11-24 04:12:06,997 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 04:12:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:07,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:12:07,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:12:07,081 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 04:12:07,081 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:12:07,090 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 04:12:07,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415113681] [2019-11-24 04:12:07,093 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-24 04:12:07,093 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:12:07,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:12:07,093 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:12:07,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:12:07,230 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:07,684 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:08,147 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:08,736 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:08,883 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:09,142 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:09,474 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:09,515 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:09,741 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:10,061 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:10,178 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:12:11,027 WARN L192 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 104 [2019-11-24 04:12:11,715 WARN L192 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2019-11-24 04:12:12,276 WARN L192 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 121 [2019-11-24 04:12:13,004 WARN L192 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 143 [2019-11-24 04:12:13,741 WARN L192 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 143 [2019-11-24 04:12:14,538 WARN L192 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 152 [2019-11-24 04:12:14,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:12:14,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2019-11-24 04:12:14,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806866386] [2019-11-24 04:12:14,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 04:12:14,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:12:14,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 04:12:14,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:12:14,542 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 8 states. [2019-11-24 04:12:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:12:14,754 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-11-24 04:12:14,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:12:14,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-24 04:12:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:12:14,757 INFO L225 Difference]: With dead ends: 32 [2019-11-24 04:12:14,757 INFO L226 Difference]: Without dead ends: 21 [2019-11-24 04:12:14,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:12:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-24 04:12:14,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-24 04:12:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-24 04:12:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2019-11-24 04:12:14,765 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2019-11-24 04:12:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:12:14,766 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2019-11-24 04:12:14,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 04:12:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2019-11-24 04:12:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:12:14,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:12:14,767 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:12:14,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:12:14,970 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:12:14,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:12:14,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1761147822, now seen corresponding path program 1 times [2019-11-24 04:12:14,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:12:14,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722180078] [2019-11-24 04:12:14,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:12:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:15,029 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 04:12:15,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722180078] [2019-11-24 04:12:15,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807160613] [2019-11-24 04:12:15,029 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 04:12:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:15,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:12:15,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:12:15,124 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 04:12:15,124 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:12:15,153 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 04:12:15,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167208558] [2019-11-24 04:12:15,156 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-24 04:12:15,156 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:12:15,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:12:15,159 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:12:15,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:12:15,263 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:15,554 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:15,917 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:16,538 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:16,940 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:17,621 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:17,801 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:18,346 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:18,450 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2019-11-24 04:12:18,481 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:18,565 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:18,787 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:19,165 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:19,239 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:19,265 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:19,291 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:19,308 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:19,553 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-11-24 04:12:19,739 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-24 04:12:19,901 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-11-24 04:12:22,586 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-11-24 04:12:24,721 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-11-24 04:12:27,047 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:27,172 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:12:27,598 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2019-11-24 04:12:28,422 WARN L192 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2019-11-24 04:12:29,174 WARN L192 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 91 [2019-11-24 04:12:29,769 WARN L192 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 122 [2019-11-24 04:12:30,492 WARN L192 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 144 [2019-11-24 04:12:32,670 WARN L192 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 233 DAG size of output: 166 [2019-11-24 04:12:34,979 WARN L192 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 242 DAG size of output: 175 [2019-11-24 04:12:36,518 WARN L192 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 240 DAG size of output: 163 [2019-11-24 04:12:36,726 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-24 04:12:36,987 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2019-11-24 04:12:36,990 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:12:36,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:12:36,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2019-11-24 04:12:36,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936552564] [2019-11-24 04:12:36,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:12:36,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:12:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:12:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:12:36,993 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2019-11-24 04:12:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:12:37,034 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-24 04:12:37,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:12:37,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-24 04:12:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:12:37,036 INFO L225 Difference]: With dead ends: 40 [2019-11-24 04:12:37,036 INFO L226 Difference]: Without dead ends: 23 [2019-11-24 04:12:37,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:12:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-24 04:12:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-24 04:12:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-24 04:12:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-24 04:12:37,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2019-11-24 04:12:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:12:37,044 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-24 04:12:37,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:12:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-24 04:12:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:12:37,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:12:37,045 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:12:37,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:12:37,249 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:12:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:12:37,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1115727683, now seen corresponding path program 2 times [2019-11-24 04:12:37,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:12:37,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160865442] [2019-11-24 04:12:37,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:12:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:12:38,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160865442] [2019-11-24 04:12:38,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595089721] [2019-11-24 04:12:38,124 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:12:38,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-24 04:12:38,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:12:38,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 80 conjunts are in the unsatisfiable core [2019-11-24 04:12:38,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:12:39,188 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-11-24 04:12:39,584 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-24 04:12:39,932 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-24 04:12:40,139 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2019-11-24 04:12:41,980 WARN L192 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 354 DAG size of output: 170 [2019-11-24 04:12:42,178 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2019-11-24 04:12:44,423 WARN L192 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 308 DAG size of output: 234 [2019-11-24 04:12:44,657 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2019-11-24 04:12:48,480 WARN L192 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 508 DAG size of output: 227 [2019-11-24 04:12:48,677 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2019-11-24 04:12:52,389 WARN L192 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 404 DAG size of output: 236 [2019-11-24 04:12:52,576 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2019-11-24 04:13:01,367 WARN L192 SmtUtils]: Spent 8.70 s on a formula simplification. DAG size of input: 626 DAG size of output: 308 [2019-11-24 04:13:01,583 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2019-11-24 04:13:05,664 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 417 DAG size of output: 307 [2019-11-24 04:13:05,871 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-11-24 04:13:13,846 WARN L192 SmtUtils]: Spent 7.59 s on a formula simplification. DAG size of input: 2057 DAG size of output: 308 [2019-11-24 04:13:16,662 WARN L192 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 432 DAG size of output: 328