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/reducercommutativity/sum40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:25:43,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:25:43,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:25:43,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:25:43,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:25:43,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:25:43,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:25:43,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:25:43,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:25:43,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:25:43,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:25:43,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:25:43,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:25:43,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:25:43,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:25:43,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:25:43,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:25:43,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:25:43,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:25:43,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:25:43,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:25:43,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:25:43,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:25:43,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:25:43,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:25:43,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:25:43,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:25:43,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:25:43,835 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 03:25:43,854 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:25:43,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:25:43,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:25:43,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:25:43,857 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:25:43,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:25:43,857 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:25:43,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:25:43,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:25:43,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:25:43,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:25:43,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:25:43,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:25:43,860 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:25:43,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:25:43,860 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:25:43,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:25:43,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:25:43,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:25:43,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:25:43,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:25:43,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:25:43,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:25:43,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:25:43,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:25:43,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:25:43,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:25:43,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:25:43,863 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 03:25:44,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:25:44,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:25:44,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:25:44,185 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:25:44,186 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:25:44,186 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum40-2.i [2019-10-15 03:25:44,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392bfce5a/ac2ecabcea134cf089a97f723f8a3d6d/FLAG84a6b87fb [2019-10-15 03:25:44,742 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:25:44,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum40-2.i [2019-10-15 03:25:44,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392bfce5a/ac2ecabcea134cf089a97f723f8a3d6d/FLAG84a6b87fb [2019-10-15 03:25:45,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392bfce5a/ac2ecabcea134cf089a97f723f8a3d6d [2019-10-15 03:25:45,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:25:45,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:25:45,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:45,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:25:45,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:25:45,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:45" (1/1) ... [2019-10-15 03:25:45,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71163d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45, skipping insertion in model container [2019-10-15 03:25:45,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:45" (1/1) ... [2019-10-15 03:25:45,162 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:25:45,185 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:25:45,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:45,396 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:25:45,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:45,513 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:25:45,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45 WrapperNode [2019-10-15 03:25:45,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:45,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:25:45,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:25:45,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:25:45,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45" (1/1) ... [2019-10-15 03:25:45,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45" (1/1) ... [2019-10-15 03:25:45,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45" (1/1) ... [2019-10-15 03:25:45,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45" (1/1) ... [2019-10-15 03:25:45,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45" (1/1) ... [2019-10-15 03:25:45,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45" (1/1) ... [2019-10-15 03:25:45,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45" (1/1) ... [2019-10-15 03:25:45,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:25:45,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:25:45,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:25:45,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:25:45,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:25:45,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:25:45,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:25:45,618 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-10-15 03:25:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:25:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:25:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:25:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-10-15 03:25:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:25:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:25:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:25:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:25:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:25:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:25:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:25:46,038 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:25:46,038 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:25:46,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:46 BoogieIcfgContainer [2019-10-15 03:25:46,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:25:46,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:25:46,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:25:46,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:25:46,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:25:45" (1/3) ... [2019-10-15 03:25:46,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5a356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:46, skipping insertion in model container [2019-10-15 03:25:46,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:45" (2/3) ... [2019-10-15 03:25:46,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5a356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:46, skipping insertion in model container [2019-10-15 03:25:46,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:46" (3/3) ... [2019-10-15 03:25:46,048 INFO L109 eAbstractionObserver]: Analyzing ICFG sum40-2.i [2019-10-15 03:25:46,056 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:25:46,065 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:25:46,077 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:25:46,102 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:25:46,102 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:25:46,102 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:25:46,102 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:25:46,102 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:25:46,103 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:25:46,103 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:25:46,103 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:25:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:25:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:25:46,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:46,127 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:46,130 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:46,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1818423299, now seen corresponding path program 1 times [2019-10-15 03:25:46,146 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:46,146 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288194120] [2019-10-15 03:25:46,147 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:46,147 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:46,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 03:25:46,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288194120] [2019-10-15 03:25:46,328 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:46,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:46,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284070823] [2019-10-15 03:25:46,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:46,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:46,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:46,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:46,361 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:25:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:46,424 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:25:46,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:46,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:25:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:46,437 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:25:46,438 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:25:46,446 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 03:25:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:25:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:25:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:25:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:25:46,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:25:46,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:46,506 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:25:46,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:25:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:25:46,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:46,512 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:46,512 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:46,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2093950433, now seen corresponding path program 1 times [2019-10-15 03:25:46,514 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:46,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674813352] [2019-10-15 03:25:46,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:46,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:46,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:25:46,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674813352] [2019-10-15 03:25:46,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569867645] [2019-10-15 03:25:46,673 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 03:25:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:46,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:25:46,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:25:46,787 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:25:46,840 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:25:46,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:25:46,841 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963816939] [2019-10-15 03:25:46,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:46,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:46,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:46,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:25:46,844 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:25:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:46,855 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:25:46,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:46,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:25:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:46,857 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:25:46,857 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:25:46,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:25:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:25:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:25:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:25:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:25:46,865 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:25:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:46,865 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:25:46,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:25:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:25:46,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:46,867 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:47,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:47,073 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:47,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:47,074 INFO L82 PathProgramCache]: Analyzing trace with hash 903502258, now seen corresponding path program 1 times [2019-10-15 03:25:47,075 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:47,075 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22626707] [2019-10-15 03:25:47,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:47,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:47,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:47,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22626707] [2019-10-15 03:25:47,177 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:47,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:47,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081555141] [2019-10-15 03:25:47,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:47,178 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:47,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:47,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:47,179 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:25:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:47,190 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:25:47,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:47,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:25:47,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:47,192 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:25:47,193 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:25:47,193 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 03:25:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:25:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:25:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:25:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:25:47,200 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:25:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:47,202 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:25:47,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:25:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:25:47,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:47,204 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:47,204 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2130547361, now seen corresponding path program 1 times [2019-10-15 03:25:47,205 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:47,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089342483] [2019-10-15 03:25:47,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:47,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:47,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:47,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089342483] [2019-10-15 03:25:47,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280654056] [2019-10-15 03:25:47,325 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 [2019-10-15 03:25:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:47,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:47,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:47,454 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:47,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1674931494] [2019-10-15 03:25:47,527 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:47,528 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:47,536 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:47,549 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:47,550 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:47,703 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:49,789 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:49,859 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:49,863 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:50,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:50,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:50,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171936454] [2019-10-15 03:25:50,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:50,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:50,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:50,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:50,247 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 03:25:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:50,945 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:25:50,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:50,946 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 03:25:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:50,947 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:25:50,947 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:25:50,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:50,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:25:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:25:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:25:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:25:50,955 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 03:25:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:50,956 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:25:50,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:25:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:25:50,957 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:50,957 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:51,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:51,158 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash 356639231, now seen corresponding path program 2 times [2019-10-15 03:25:51,160 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:51,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832312339] [2019-10-15 03:25:51,160 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:51,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:51,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:51,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832312339] [2019-10-15 03:25:51,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318069717] [2019-10-15 03:25:51,272 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 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 03:25:51,351 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:25:51,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:51,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:51,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:51,377 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:51,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899566285] [2019-10-15 03:25:51,421 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:51,421 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:51,422 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:51,423 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:51,423 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:51,461 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:53,009 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:53,038 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:53,041 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:53,444 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:53,445 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 03:25:53,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268731533] [2019-10-15 03:25:53,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:25:53,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:53,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:25:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:25:53,447 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 03:25:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:54,429 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 03:25:54,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:25:54,430 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 03:25:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:54,431 INFO L225 Difference]: With dead ends: 44 [2019-10-15 03:25:54,431 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 03:25:54,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 03:25:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 03:25:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 03:25:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:25:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 03:25:54,440 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 03:25:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:54,440 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 03:25:54,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:25:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 03:25:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:25:54,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:54,442 INFO L380 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:54,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:54,646 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:54,647 INFO L82 PathProgramCache]: Analyzing trace with hash 906031436, now seen corresponding path program 3 times [2019-10-15 03:25:54,647 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:54,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855742224] [2019-10-15 03:25:54,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:54,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:54,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:54,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855742224] [2019-10-15 03:25:54,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579881748] [2019-10-15 03:25:54,747 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 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 03:25:54,871 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:54,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:54,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:25:54,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:54,909 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:55,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545432276] [2019-10-15 03:25:55,021 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:55,021 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:55,022 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:55,022 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:55,022 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:55,048 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:56,391 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:56,419 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:56,424 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:56,927 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:56,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 03:25:56,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273163984] [2019-10-15 03:25:56,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 03:25:56,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:56,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 03:25:56,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:25:56,930 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 03:25:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:58,142 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 03:25:58,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 03:25:58,142 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 03:25:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:58,143 INFO L225 Difference]: With dead ends: 54 [2019-10-15 03:25:58,143 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:25:58,146 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 03:25:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:25:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 03:25:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 03:25:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 03:25:58,160 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 03:25:58,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:58,163 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 03:25:58,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 03:25:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 03:25:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 03:25:58,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:58,168 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:58,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:58,377 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:58,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:58,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1194663378, now seen corresponding path program 4 times [2019-10-15 03:25:58,379 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:58,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390930543] [2019-10-15 03:25:58,379 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:58,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:58,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:58,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390930543] [2019-10-15 03:25:58,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997290267] [2019-10-15 03:25:58,606 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 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 03:25:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:58,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:25:58,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:58,773 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:59,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631234217] [2019-10-15 03:25:59,124 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:59,124 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:59,125 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:59,125 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:59,126 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:59,145 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:00,401 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:00,423 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:00,426 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:01,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:01,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 03:26:01,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590046639] [2019-10-15 03:26:01,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 03:26:01,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:01,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 03:26:01,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 03:26:01,083 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 03:26:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:02,768 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 03:26:02,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 03:26:02,769 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 03:26:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:02,770 INFO L225 Difference]: With dead ends: 68 [2019-10-15 03:26:02,770 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 03:26:02,772 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 03:26:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 03:26:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 03:26:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 03:26:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 03:26:02,781 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 03:26:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:02,782 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 03:26:02,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 03:26:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 03:26:02,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 03:26:02,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:02,784 INFO L380 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:26:02,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:02,989 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1997950062, now seen corresponding path program 5 times [2019-10-15 03:26:02,990 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:02,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419040706] [2019-10-15 03:26:02,990 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:02,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:02,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:26:03,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419040706] [2019-10-15 03:26:03,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929210131] [2019-10-15 03:26:03,435 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:03,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:26:03,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:26:03,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:26:03,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-10-15 03:26:03,649 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-10-15 03:26:03,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930455351] [2019-10-15 03:26:03,699 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:03,699 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:03,700 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:03,701 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:03,701 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:03,719 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:05,083 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:05,105 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:05,108 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:05,614 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:05,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 03:26:05,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219702404] [2019-10-15 03:26:05,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 03:26:05,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 03:26:05,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 03:26:05,617 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 03:26:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:07,630 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 03:26:07,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 03:26:07,630 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 03:26:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:07,632 INFO L225 Difference]: With dead ends: 72 [2019-10-15 03:26:07,632 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 03:26:07,635 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 03:26:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 03:26:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 03:26:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 03:26:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 03:26:07,643 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 03:26:07,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:07,643 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 03:26:07,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 03:26:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 03:26:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 03:26:07,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:07,645 INFO L380 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:26:07,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:07,849 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:07,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1475332959, now seen corresponding path program 6 times [2019-10-15 03:26:07,850 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:07,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443930252] [2019-10-15 03:26:07,851 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:07,851 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:07,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:26:08,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443930252] [2019-10-15 03:26:08,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880492808] [2019-10-15 03:26:08,280 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:08,491 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:26:08,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:26:08,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 03:26:08,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:26:08,521 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:26:09,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1308966847] [2019-10-15 03:26:09,291 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:09,291 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:09,292 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:09,292 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:09,292 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:09,305 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:10,583 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:10,613 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:10,616 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:11,125 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:11,126 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 53 [2019-10-15 03:26:11,126 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77655053] [2019-10-15 03:26:11,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-15 03:26:11,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:11,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-15 03:26:11,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1930, Unknown=0, NotChecked=0, Total=2862 [2019-10-15 03:26:11,129 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 54 states. [2019-10-15 03:26:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:13,665 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2019-10-15 03:26:13,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 03:26:13,665 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 67 [2019-10-15 03:26:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:13,666 INFO L225 Difference]: With dead ends: 88 [2019-10-15 03:26:13,667 INFO L226 Difference]: Without dead ends: 67 [2019-10-15 03:26:13,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 165 SyntacticMatches, 16 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2707, Invalid=7595, Unknown=0, NotChecked=0, Total=10302 [2019-10-15 03:26:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-15 03:26:13,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-10-15 03:26:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-15 03:26:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-10-15 03:26:13,681 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 67 [2019-10-15 03:26:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:13,681 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-10-15 03:26:13,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-15 03:26:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-10-15 03:26:13,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-15 03:26:13,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:13,683 INFO L380 BasicCegarLoop]: trace histogram [40, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:26:13,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:13,886 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:13,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:13,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1228286333, now seen corresponding path program 7 times [2019-10-15 03:26:13,887 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:13,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908092770] [2019-10-15 03:26:13,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:13,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:13,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2019-10-15 03:26:14,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908092770] [2019-10-15 03:26:14,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521281837] [2019-10-15 03:26:14,003 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:14,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:26:14,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-10-15 03:26:14,305 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-10-15 03:26:14,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1401331919] [2019-10-15 03:26:14,386 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:14,387 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:14,387 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:14,387 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:14,388 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:14,402 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:15,664 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:15,695 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:15,698 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:16,075 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:16,075 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 27 [2019-10-15 03:26:16,075 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628043378] [2019-10-15 03:26:16,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 03:26:16,076 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:16,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 03:26:16,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2019-10-15 03:26:16,077 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 28 states. [2019-10-15 03:26:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:17,250 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-10-15 03:26:17,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 03:26:17,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2019-10-15 03:26:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:17,252 INFO L225 Difference]: With dead ends: 94 [2019-10-15 03:26:17,252 INFO L226 Difference]: Without dead ends: 74 [2019-10-15 03:26:17,254 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=2141, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 03:26:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-15 03:26:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-10-15 03:26:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-15 03:26:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2019-10-15 03:26:17,264 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 80 [2019-10-15 03:26:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:17,264 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2019-10-15 03:26:17,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 03:26:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2019-10-15 03:26:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 03:26:17,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:17,266 INFO L380 BasicCegarLoop]: trace histogram [40, 30, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:26:17,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:17,471 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash 906923278, now seen corresponding path program 8 times [2019-10-15 03:26:17,472 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:17,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267357951] [2019-10-15 03:26:17,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:17,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:17,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2019-10-15 03:26:17,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267357951] [2019-10-15 03:26:17,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559750686] [2019-10-15 03:26:17,666 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:17,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 03:26:17,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:26:17,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:26:17,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 246 proven. 15 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2019-10-15 03:26:18,056 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2019-10-15 03:26:18,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1003409997] [2019-10-15 03:26:18,174 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:18,174 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:18,175 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:18,175 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:18,175 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:18,194 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:19,401 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:19,434 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:19,436 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:19,812 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:19,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8, 11] total 35 [2019-10-15 03:26:19,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454623821] [2019-10-15 03:26:19,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-15 03:26:19,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-15 03:26:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 03:26:19,815 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 36 states.