java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:00:55,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:00:55,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:00:55,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:00:55,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:00:55,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:00:55,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:00:55,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:00:55,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:00:55,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:00:55,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:00:55,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:00:55,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:00:55,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:00:55,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:00:55,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:00:55,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:00:55,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:00:55,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:00:55,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:00:55,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:00:55,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:00:55,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:00:55,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:00:55,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:00:55,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:00:55,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:00:55,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:00:55,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:00:55,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:00:55,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:00:55,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:00:55,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:00:55,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:00:55,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:00:55,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:00:55,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:00:55,739 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:00:55,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:00:55,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:00:55,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:00:55,743 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:00:55,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:00:55,744 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:00:55,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:00:55,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:00:55,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:00:55,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:00:55,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:00:55,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:00:55,745 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:00:55,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:00:55,746 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:00:55,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:00:55,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:00:55,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:00:55,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:00:55,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:00:55,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:55,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:00:55,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:00:55,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:00:55,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:00:55,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:00:55,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:00:55,748 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:00:56,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:00:56,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:00:56,046 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:00:56,048 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:00:56,048 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:00:56,049 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2019-10-15 03:00:56,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a94919fa9/6b136e781c754df0b103deedea6d0dcf/FLAGbf57f7087 [2019-10-15 03:00:56,620 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:00:56,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2019-10-15 03:00:56,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a94919fa9/6b136e781c754df0b103deedea6d0dcf/FLAGbf57f7087 [2019-10-15 03:00:57,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a94919fa9/6b136e781c754df0b103deedea6d0dcf [2019-10-15 03:00:57,057 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:00:57,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:00:57,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:57,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:00:57,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:00:57,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:57" (1/1) ... [2019-10-15 03:00:57,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@517e93e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57, skipping insertion in model container [2019-10-15 03:00:57,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:57" (1/1) ... [2019-10-15 03:00:57,073 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:00:57,088 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:00:57,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:57,256 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:00:57,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:57,295 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:00:57,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57 WrapperNode [2019-10-15 03:00:57,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:57,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:00:57,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:00:57,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:00:57,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57" (1/1) ... [2019-10-15 03:00:57,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57" (1/1) ... [2019-10-15 03:00:57,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57" (1/1) ... [2019-10-15 03:00:57,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57" (1/1) ... [2019-10-15 03:00:57,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57" (1/1) ... [2019-10-15 03:00:57,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57" (1/1) ... [2019-10-15 03:00:57,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57" (1/1) ... [2019-10-15 03:00:57,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:00:57,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:00:57,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:00:57,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:00:57,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57" (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 [2019-10-15 03:00:57,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:00:57,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:00:57,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:00:57,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:00:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:00:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:00:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:00:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:00:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:00:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:00:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:00:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:00:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:00:57,698 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:00:57,699 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:00:57,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:57 BoogieIcfgContainer [2019-10-15 03:00:57,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:00:57,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:00:57,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:00:57,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:00:57,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:00:57" (1/3) ... [2019-10-15 03:00:57,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d940b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:57, skipping insertion in model container [2019-10-15 03:00:57,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:57" (2/3) ... [2019-10-15 03:00:57,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d940b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:57, skipping insertion in model container [2019-10-15 03:00:57,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:57" (3/3) ... [2019-10-15 03:00:57,709 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2019-10-15 03:00:57,724 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:00:57,734 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:00:57,749 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:00:57,784 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:00:57,785 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:00:57,785 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:00:57,785 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:00:57,785 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:00:57,786 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:00:57,786 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:00:57,786 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:00:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 03:00:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:00:57,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:57,813 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:57,817 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:57,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1959451811, now seen corresponding path program 1 times [2019-10-15 03:00:57,833 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:57,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062706728] [2019-10-15 03:00:57,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:57,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:57,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:57,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062706728] [2019-10-15 03:00:57,977 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:57,978 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:00:57,978 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3626198] [2019-10-15 03:00:57,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:00:57,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:57,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:00:57,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:00:57,996 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-15 03:00:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:58,033 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-15 03:00:58,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:00:58,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-15 03:00:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:58,045 INFO L225 Difference]: With dead ends: 29 [2019-10-15 03:00:58,046 INFO L226 Difference]: Without dead ends: 12 [2019-10-15 03:00:58,050 INFO L600 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 [2019-10-15 03:00:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-15 03:00:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-15 03:00:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 03:00:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 03:00:58,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-15 03:00:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:58,089 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 03:00:58,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:00:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 03:00:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:00:58,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:58,091 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:58,091 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash 504932467, now seen corresponding path program 1 times [2019-10-15 03:00:58,093 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:58,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994062822] [2019-10-15 03:00:58,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:58,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:58,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:58,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994062822] [2019-10-15 03:00:58,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714936355] [2019-10-15 03:00:58,168 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 [2019-10-15 03:00:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:58,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:00:58,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:58,254 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:58,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895874994] [2019-10-15 03:00:58,331 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:00:58,331 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:00:58,354 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:00:58,363 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:00:58,363 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:00:58,565 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:00:58,981 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 03:00:58,998 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:00:59,006 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:00:59,383 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:00:59,383 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 9] total 16 [2019-10-15 03:00:59,383 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145190000] [2019-10-15 03:00:59,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 03:00:59,386 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:59,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 03:00:59,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-10-15 03:00:59,388 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 16 states. [2019-10-15 03:00:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:59,915 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-15 03:00:59,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:00:59,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 11 [2019-10-15 03:00:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:59,918 INFO L225 Difference]: With dead ends: 20 [2019-10-15 03:00:59,918 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:00:59,921 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:00:59,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:00:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 03:00:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:00:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 03:00:59,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-15 03:00:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:59,931 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 03:00:59,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 03:00:59,932 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 03:00:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 03:00:59,933 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:59,934 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:00,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:00,147 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:00,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1070026915, now seen corresponding path program 2 times [2019-10-15 03:01:00,150 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:00,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957552219] [2019-10-15 03:01:00,151 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:00,151 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:00,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:00,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957552219] [2019-10-15 03:01:00,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911220328] [2019-10-15 03:01:00,229 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 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 [2019-10-15 03:01:00,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:01:00,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:00,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:01:00,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:00,309 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:00,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038274412] [2019-10-15 03:01:00,371 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:00,372 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:00,372 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:00,373 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:00,373 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:00,420 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:00,606 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 03:01:00,619 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:00,626 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:00,989 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:00,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 9] total 22 [2019-10-15 03:01:00,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643755360] [2019-10-15 03:01:00,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:01:00,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:00,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:01:00,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:01:00,992 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 22 states. [2019-10-15 03:01:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:02,039 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-10-15 03:01:02,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 03:01:02,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 14 [2019-10-15 03:01:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:02,040 INFO L225 Difference]: With dead ends: 26 [2019-10-15 03:01:02,040 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:01:02,042 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 03:01:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:01:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:01:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:01:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-15 03:01:02,051 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2019-10-15 03:01:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:02,051 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-15 03:01:02,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:01:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-15 03:01:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 03:01:02,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:02,053 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:02,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:02,262 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1928773981, now seen corresponding path program 3 times [2019-10-15 03:01:02,262 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:02,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372559642] [2019-10-15 03:01:02,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:02,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:02,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:02,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372559642] [2019-10-15 03:01:02,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429694109] [2019-10-15 03:01:02,412 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-15 03:01:02,479 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:01:02,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:02,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 03:01:02,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:02,501 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:02,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956197544] [2019-10-15 03:01:02,997 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:02,997 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:02,998 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:02,998 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:02,998 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:03,031 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:03,162 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 03:01:03,185 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:03,197 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:03,598 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:03,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 9] total 34 [2019-10-15 03:01:03,598 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509365518] [2019-10-15 03:01:03,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 03:01:03,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 03:01:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 03:01:03,602 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 34 states. [2019-10-15 03:01:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:04,845 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-10-15 03:01:04,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 03:01:04,850 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 20 [2019-10-15 03:01:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:04,852 INFO L225 Difference]: With dead ends: 38 [2019-10-15 03:01:04,852 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 03:01:04,855 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=966, Invalid=2816, Unknown=0, NotChecked=0, Total=3782 [2019-10-15 03:01:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 03:01:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 03:01:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 03:01:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-15 03:01:04,863 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2019-10-15 03:01:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:04,863 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-15 03:01:04,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-15 03:01:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-15 03:01:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:01:04,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:04,865 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:05,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:05,069 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1953340067, now seen corresponding path program 4 times [2019-10-15 03:01:05,070 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:05,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370260673] [2019-10-15 03:01:05,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:05,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:05,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:05,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370260673] [2019-10-15 03:01:05,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231247649] [2019-10-15 03:01:05,435 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-10-15 03:01:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:05,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 03:01:05,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:05,535 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:06,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [80676694] [2019-10-15 03:01:06,493 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:06,493 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:06,493 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:06,494 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:06,494 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:06,532 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:06,650 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 03:01:06,658 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:06,666 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:07,136 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:07,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 9] total 58 [2019-10-15 03:01:07,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204054775] [2019-10-15 03:01:07,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-15 03:01:07,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:07,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-15 03:01:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 03:01:07,141 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 58 states. [2019-10-15 03:01:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:10,660 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2019-10-15 03:01:10,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-15 03:01:10,663 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 32 [2019-10-15 03:01:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:10,664 INFO L225 Difference]: With dead ends: 62 [2019-10-15 03:01:10,665 INFO L226 Difference]: Without dead ends: 57 [2019-10-15 03:01:10,669 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3594, Invalid=8396, Unknown=0, NotChecked=0, Total=11990 [2019-10-15 03:01:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-15 03:01:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-15 03:01:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-15 03:01:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-10-15 03:01:10,680 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2019-10-15 03:01:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:10,680 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-10-15 03:01:10,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-15 03:01:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-10-15 03:01:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 03:01:10,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:10,682 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:10,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:10,885 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:10,886 INFO L82 PathProgramCache]: Analyzing trace with hash -751283549, now seen corresponding path program 5 times [2019-10-15 03:01:10,886 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:10,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132288991] [2019-10-15 03:01:10,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:10,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:10,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:11,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132288991] [2019-10-15 03:01:11,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565450292] [2019-10-15 03:01:11,926 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 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 [2019-10-15 03:01:37,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-15 03:01:37,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:37,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 03:01:37,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:37,213 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:39,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733414369] [2019-10-15 03:01:39,869 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:39,869 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:39,870 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:39,870 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:39,871 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:39,892 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:39,971 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 03:01:39,977 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:39,980 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:40,531 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:40,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 9] total 106 [2019-10-15 03:01:40,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68286570] [2019-10-15 03:01:40,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-10-15 03:01:40,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:40,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-10-15 03:01:40,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4681, Invalid=6449, Unknown=0, NotChecked=0, Total=11130 [2019-10-15 03:01:40,537 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 106 states.