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/array-examples/standard_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:15,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:15,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:15,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:15,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:15,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:15,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:15,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:15,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:15,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:15,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:15,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:15,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:15,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:15,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:15,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:15,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:15,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:15,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:15,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:15,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:15,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:15,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:15,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:15,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:15,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:15,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:15,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:15,904 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 01:33:15,918 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:15,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:15,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:15,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:15,920 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:15,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:15,921 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:15,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:15,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:15,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:15,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:15,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:15,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:15,923 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:15,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:15,923 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:15,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:15,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:15,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:15,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:15,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:15,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:15,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:15,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:15,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:15,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:15,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:15,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:15,926 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 01:33:16,194 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:16,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:16,211 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:16,213 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:16,213 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:16,214 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-10-15 01:33:16,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead77b182/a884c5e46e4a473fa1f1dbc1b3205fa1/FLAGa053b5d92 [2019-10-15 01:33:16,800 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:16,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-10-15 01:33:16,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead77b182/a884c5e46e4a473fa1f1dbc1b3205fa1/FLAGa053b5d92 [2019-10-15 01:33:17,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead77b182/a884c5e46e4a473fa1f1dbc1b3205fa1 [2019-10-15 01:33:17,146 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:17,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:17,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:17,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:17,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:17,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175279dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17, skipping insertion in model container [2019-10-15 01:33:17,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,163 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:17,187 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:17,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:17,397 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:17,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:17,445 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:17,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17 WrapperNode [2019-10-15 01:33:17,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:17,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:17,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:17,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:17,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:17,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:17,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:17,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:17,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17" (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 01:33:17,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:17,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:17,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:17,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:33:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:18,224 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:18,225 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:33:18,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:18 BoogieIcfgContainer [2019-10-15 01:33:18,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:18,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:18,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:18,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:18,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:17" (1/3) ... [2019-10-15 01:33:18,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2823fda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:18, skipping insertion in model container [2019-10-15 01:33:18,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17" (2/3) ... [2019-10-15 01:33:18,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2823fda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:18, skipping insertion in model container [2019-10-15 01:33:18,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:18" (3/3) ... [2019-10-15 01:33:18,235 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2019-10-15 01:33:18,244 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:18,251 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:18,262 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:18,287 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:18,287 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:18,287 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:18,288 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:18,288 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:18,288 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:18,288 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:18,288 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-15 01:33:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:33:18,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:18,311 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:18,312 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1040189996, now seen corresponding path program 1 times [2019-10-15 01:33:18,324 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:18,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481195230] [2019-10-15 01:33:18,325 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:18,325 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:18,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:18,518 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 01:33:18,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481195230] [2019-10-15 01:33:18,520 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:18,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:18,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019665816] [2019-10-15 01:33:18,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:18,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:18,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:18,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:18,545 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-15 01:33:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:18,582 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-10-15 01:33:18,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:18,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-15 01:33:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:18,593 INFO L225 Difference]: With dead ends: 47 [2019-10-15 01:33:18,593 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:33:18,597 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 01:33:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:33:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:33:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:33:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2019-10-15 01:33:18,645 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 19 [2019-10-15 01:33:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:18,646 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-10-15 01:33:18,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2019-10-15 01:33:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:33:18,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:18,647 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:18,648 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:18,648 INFO L82 PathProgramCache]: Analyzing trace with hash -537190458, now seen corresponding path program 1 times [2019-10-15 01:33:18,649 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:18,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534245213] [2019-10-15 01:33:18,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:18,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:18,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:33:18,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534245213] [2019-10-15 01:33:18,750 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:18,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:18,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395282841] [2019-10-15 01:33:18,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:18,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:18,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:18,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:18,753 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand 3 states. [2019-10-15 01:33:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:18,826 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2019-10-15 01:33:18,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:18,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-15 01:33:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:18,828 INFO L225 Difference]: With dead ends: 48 [2019-10-15 01:33:18,829 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:33:18,830 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 01:33:18,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:33:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 01:33:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:33:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-10-15 01:33:18,846 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 20 [2019-10-15 01:33:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:18,846 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-10-15 01:33:18,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-10-15 01:33:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:33:18,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:18,848 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:18,849 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash -669181734, now seen corresponding path program 1 times [2019-10-15 01:33:18,850 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:18,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926181748] [2019-10-15 01:33:18,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:18,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:18,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:33:18,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926181748] [2019-10-15 01:33:18,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189332046] [2019-10-15 01:33:18,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:33:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:19,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:19,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:33:19,179 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:33:19,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488923165] [2019-10-15 01:33:19,281 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:19,282 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:19,297 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:19,316 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:19,317 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:19,496 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:21,462 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:21,805 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:21,821 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:21,829 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:22,170 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:22,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:33:22,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413456464] [2019-10-15 01:33:22,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:33:22,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:22,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:33:22,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:33:22,174 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 18 states. [2019-10-15 01:33:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:23,011 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2019-10-15 01:33:23,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:33:23,012 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2019-10-15 01:33:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:23,013 INFO L225 Difference]: With dead ends: 77 [2019-10-15 01:33:23,013 INFO L226 Difference]: Without dead ends: 52 [2019-10-15 01:33:23,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:33:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-15 01:33:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2019-10-15 01:33:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 01:33:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-15 01:33:23,026 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 28 [2019-10-15 01:33:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:23,026 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-15 01:33:23,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:33:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-15 01:33:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-15 01:33:23,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:23,028 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:23,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:23,242 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash 619647852, now seen corresponding path program 2 times [2019-10-15 01:33:23,243 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:23,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508263514] [2019-10-15 01:33:23,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:23,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:23,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:33:23,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508263514] [2019-10-15 01:33:23,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000469301] [2019-10-15 01:33:23,370 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 01:33:23,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:33:23,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:23,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:33:23,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:33:23,524 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:33:23,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207247437] [2019-10-15 01:33:23,570 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:23,572 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:23,572 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:23,573 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:23,573 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:23,605 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:24,299 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:25,348 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:25,803 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:25,811 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:25,814 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:26,136 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:26,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 11] total 23 [2019-10-15 01:33:26,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933409078] [2019-10-15 01:33:26,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:33:26,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:26,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:33:26,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:33:26,140 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 23 states. [2019-10-15 01:33:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:27,369 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2019-10-15 01:33:27,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:33:27,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2019-10-15 01:33:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:27,371 INFO L225 Difference]: With dead ends: 118 [2019-10-15 01:33:27,371 INFO L226 Difference]: Without dead ends: 85 [2019-10-15 01:33:27,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:33:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-15 01:33:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2019-10-15 01:33:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-15 01:33:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2019-10-15 01:33:27,386 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 39 [2019-10-15 01:33:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:27,387 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2019-10-15 01:33:27,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:33:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2019-10-15 01:33:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 01:33:27,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:27,389 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:27,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:27,598 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:27,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1999730054, now seen corresponding path program 3 times [2019-10-15 01:33:27,599 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:27,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691808776] [2019-10-15 01:33:27,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:27,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691808776] [2019-10-15 01:33:27,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860390794] [2019-10-15 01:33:27,817 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 01:33:27,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:27,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:27,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:33:27,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:27,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:28,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419687819] [2019-10-15 01:33:28,045 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:28,045 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:28,046 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:28,046 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:28,046 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:28,067 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:29,737 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:29,744 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:29,749 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:30,014 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:30,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:33:30,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282066635] [2019-10-15 01:33:30,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:33:30,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:30,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:33:30,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:33:30,017 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 25 states. [2019-10-15 01:33:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:30,954 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2019-10-15 01:33:30,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:33:30,955 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2019-10-15 01:33:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:30,957 INFO L225 Difference]: With dead ends: 157 [2019-10-15 01:33:30,957 INFO L226 Difference]: Without dead ends: 92 [2019-10-15 01:33:30,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:33:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-15 01:33:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-10-15 01:33:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:33:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2019-10-15 01:33:30,988 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 72 [2019-10-15 01:33:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:30,990 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2019-10-15 01:33:30,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:33:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2019-10-15 01:33:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-15 01:33:30,992 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:30,992 INFO L380 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:31,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:31,204 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:31,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:31,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1170703852, now seen corresponding path program 4 times [2019-10-15 01:33:31,205 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:31,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351612281] [2019-10-15 01:33:31,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:31,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:31,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:31,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351612281] [2019-10-15 01:33:31,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060924004] [2019-10-15 01:33:31,407 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 01:33:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:31,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:33:31,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:31,598 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:31,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016763098] [2019-10-15 01:33:31,872 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:31,872 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:31,873 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:31,873 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:31,873 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:31,900 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:32,895 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:33,544 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:33,551 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:33,554 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:33,849 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:33,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:33:33,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088414183] [2019-10-15 01:33:33,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:33:33,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:33:33,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:33:33,853 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 39 states. [2019-10-15 01:33:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:35,332 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2019-10-15 01:33:35,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:33:35,334 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 79 [2019-10-15 01:33:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:35,335 INFO L225 Difference]: With dead ends: 171 [2019-10-15 01:33:35,337 INFO L226 Difference]: Without dead ends: 106 [2019-10-15 01:33:35,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1244, Invalid=3868, Unknown=0, NotChecked=0, Total=5112 [2019-10-15 01:33:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-15 01:33:35,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2019-10-15 01:33:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-15 01:33:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2019-10-15 01:33:35,370 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 79 [2019-10-15 01:33:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:35,372 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2019-10-15 01:33:35,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:33:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2019-10-15 01:33:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-15 01:33:35,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:35,376 INFO L380 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:35,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:35,577 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:35,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1927430996, now seen corresponding path program 5 times [2019-10-15 01:33:35,579 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:35,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558689376] [2019-10-15 01:33:35,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:35,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:35,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-15 01:33:36,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558689376] [2019-10-15 01:33:36,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915064045] [2019-10-15 01:33:36,112 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 01:33:39,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:33:39,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:39,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-15 01:33:39,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2019-10-15 01:33:39,931 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2019-10-15 01:33:40,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180232997] [2019-10-15 01:33:40,110 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:40,111 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:40,111 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:40,111 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:40,112 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:40,135 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:41,047 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:41,595 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:41,832 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:41,874 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:41,880 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:41,883 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:42,380 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:42,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 9, 9, 11] total 53 [2019-10-15 01:33:42,381 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406184879] [2019-10-15 01:33:42,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-15 01:33:42,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:42,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-15 01:33:42,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=2202, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 01:33:42,384 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 53 states. [2019-10-15 01:33:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:45,848 INFO L93 Difference]: Finished difference Result 236 states and 318 transitions. [2019-10-15 01:33:45,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 01:33:45,851 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 93 [2019-10-15 01:33:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:45,852 INFO L225 Difference]: With dead ends: 236 [2019-10-15 01:33:45,852 INFO L226 Difference]: Without dead ends: 171 [2019-10-15 01:33:45,856 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1684, Invalid=8416, Unknown=0, NotChecked=0, Total=10100 [2019-10-15 01:33:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-15 01:33:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2019-10-15 01:33:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-10-15 01:33:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2019-10-15 01:33:45,874 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 93 [2019-10-15 01:33:45,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:45,875 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2019-10-15 01:33:45,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-15 01:33:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2019-10-15 01:33:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:33:45,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:45,878 INFO L380 BasicCegarLoop]: trace histogram [27, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:46,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:46,087 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:46,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:46,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1606878406, now seen corresponding path program 6 times [2019-10-15 01:33:46,088 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:46,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655690186] [2019-10-15 01:33:46,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:46,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:46,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:46,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655690186] [2019-10-15 01:33:46,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70195584] [2019-10-15 01:33:46,664 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 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 01:33:46,922 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:46,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:46,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:33:46,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:46,957 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:47,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [390035030] [2019-10-15 01:33:47,884 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:33:47,885 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:47,885 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:47,885 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:47,885 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:47,898 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:49,515 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:49,524 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:49,528 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:50,321 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:50,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:33:50,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755839148] [2019-10-15 01:33:50,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-10-15 01:33:50,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:50,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-10-15 01:33:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=2952, Unknown=0, NotChecked=0, Total=4692 [2019-10-15 01:33:50,327 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand 69 states. [2019-10-15 01:33:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:53,645 INFO L93 Difference]: Finished difference Result 329 states and 375 transitions. [2019-10-15 01:33:53,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-10-15 01:33:53,646 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 158 [2019-10-15 01:33:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:53,648 INFO L225 Difference]: With dead ends: 329 [2019-10-15 01:33:53,648 INFO L226 Difference]: Without dead ends: 200 [2019-10-15 01:33:53,654 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5099, Invalid=12193, Unknown=0, NotChecked=0, Total=17292 [2019-10-15 01:33:53,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-10-15 01:33:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 191. [2019-10-15 01:33:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-10-15 01:33:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 200 transitions. [2019-10-15 01:33:53,677 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 200 transitions. Word has length 158 [2019-10-15 01:33:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:53,678 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 200 transitions. [2019-10-15 01:33:53,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-10-15 01:33:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 200 transitions. [2019-10-15 01:33:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-15 01:33:53,681 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:53,681 INFO L380 BasicCegarLoop]: trace histogram [56, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:53,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:53,886 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:53,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:53,887 INFO L82 PathProgramCache]: Analyzing trace with hash 199264364, now seen corresponding path program 7 times [2019-10-15 01:33:53,887 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:53,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32988755] [2019-10-15 01:33:53,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:53,888 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:53,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:55,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32988755] [2019-10-15 01:33:55,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152282106] [2019-10-15 01:33:55,324 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 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 01:33:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:55,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:33:55,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-15 01:33:55,701 INFO L321 TraceCheckSpWp]: Computing backward predicates...