java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:01:00,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:01:00,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:01:00,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:01:00,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:01:00,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:01:00,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:01:00,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:01:00,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:01:00,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:01:00,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:01:00,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:01:00,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:01:00,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:01:00,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:01:00,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:01:00,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:01:00,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:01:00,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:01:00,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:01:00,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:01:00,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:01:00,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:01:00,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:01:00,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:01:00,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:01:00,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:01:00,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:01:00,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:01:00,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:01:00,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:01:00,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:01:00,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:01:00,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:01:00,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:01:00,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:01:00,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:01:00,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:01:00,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:01:00,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:01:00,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:01:00,180 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 03:01:00,215 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:01:00,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:01:00,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:01:00,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:01:00,220 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:01:00,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:01:00,223 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:01:00,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:01:00,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:01:00,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:01:00,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:01:00,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:01:00,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:01:00,224 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:01:00,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:01:00,224 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:01:00,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:01:00,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:01:00,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:01:00,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:01:00,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:01:00,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:01:00,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:01:00,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:01:00,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:01:00,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:01:00,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:01:00,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:01:00,227 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 03:01:00,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:01:00,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:01:00,568 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:01:00,570 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:01:00,571 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:01:00,571 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2019-10-15 03:01:00,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3986e76a/2e27709f435148188a89c9fa86c40384/FLAG6a31f7ea9 [2019-10-15 03:01:01,187 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:01:01,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2019-10-15 03:01:01,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3986e76a/2e27709f435148188a89c9fa86c40384/FLAG6a31f7ea9 [2019-10-15 03:01:01,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3986e76a/2e27709f435148188a89c9fa86c40384 [2019-10-15 03:01:01,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:01:01,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:01:01,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:01,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:01:01,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:01:01,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:01" (1/1) ... [2019-10-15 03:01:01,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ece1d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:01, skipping insertion in model container [2019-10-15 03:01:01,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:01" (1/1) ... [2019-10-15 03:01:01,698 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:01:01,731 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:01:02,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:02,087 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:01:02,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:02,132 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:01:02,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02 WrapperNode [2019-10-15 03:01:02,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:02,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:01:02,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:01:02,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:01:02,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02" (1/1) ... [2019-10-15 03:01:02,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02" (1/1) ... [2019-10-15 03:01:02,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02" (1/1) ... [2019-10-15 03:01:02,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02" (1/1) ... [2019-10-15 03:01:02,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02" (1/1) ... [2019-10-15 03:01:02,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02" (1/1) ... [2019-10-15 03:01:02,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02" (1/1) ... [2019-10-15 03:01:02,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:01:02,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:01:02,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:01:02,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:01:02,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02" (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 03:01:02,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:01:02,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:01:02,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:01:02,317 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:01:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:01:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:01:02,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:01:02,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:01:02,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:01:02,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:01:02,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:01:02,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:01:02,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:01:02,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:01:02,586 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:01:02,586 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 03:01:02,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:02 BoogieIcfgContainer [2019-10-15 03:01:02,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:01:02,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:01:02,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:01:02,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:01:02,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:01:01" (1/3) ... [2019-10-15 03:01:02,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d28c7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:02, skipping insertion in model container [2019-10-15 03:01:02,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:02" (2/3) ... [2019-10-15 03:01:02,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d28c7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:02, skipping insertion in model container [2019-10-15 03:01:02,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:02" (3/3) ... [2019-10-15 03:01:02,616 INFO L109 eAbstractionObserver]: Analyzing ICFG array_4.i [2019-10-15 03:01:02,641 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:01:02,650 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:01:02,673 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:01:02,703 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:01:02,703 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:01:02,703 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:01:02,703 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:01:02,704 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:01:02,704 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:01:02,704 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:01:02,704 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:01:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 03:01:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:01:02,725 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:02,726 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:02,727 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2005487052, now seen corresponding path program 1 times [2019-10-15 03:01:02,741 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:02,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701375579] [2019-10-15 03:01:02,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:02,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:02,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:02,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701375579] [2019-10-15 03:01:02,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:01:02,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:01:02,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684873542] [2019-10-15 03:01:02,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:01:02,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:02,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:01:02,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:01:02,895 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-15 03:01:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:02,916 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 03:01:02,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:01:02,917 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-10-15 03:01:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:02,927 INFO L225 Difference]: With dead ends: 30 [2019-10-15 03:01:02,927 INFO L226 Difference]: Without dead ends: 13 [2019-10-15 03:01:02,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:01:02,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-15 03:01:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-15 03:01:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-15 03:01:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-15 03:01:02,987 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2019-10-15 03:01:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:02,989 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-15 03:01:02,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:01:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-15 03:01:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:01:02,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:02,992 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:02,998 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:03,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1973180885, now seen corresponding path program 1 times [2019-10-15 03:01:03,000 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:03,001 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281449325] [2019-10-15 03:01:03,001 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:03,001 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:03,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:03,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281449325] [2019-10-15 03:01:03,135 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:01:03,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:01:03,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585341661] [2019-10-15 03:01:03,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:01:03,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:03,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:01:03,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:01:03,142 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-10-15 03:01:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:03,182 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-10-15 03:01:03,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:01:03,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 03:01:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:03,186 INFO L225 Difference]: With dead ends: 24 [2019-10-15 03:01:03,186 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 03:01:03,187 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 03:01:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 03:01:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2019-10-15 03:01:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-15 03:01:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-15 03:01:03,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2019-10-15 03:01:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:03,197 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-15 03:01:03,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:01:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-15 03:01:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 03:01:03,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:03,200 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:03,201 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:03,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1604112681, now seen corresponding path program 1 times [2019-10-15 03:01:03,202 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:03,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027507399] [2019-10-15 03:01:03,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:03,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:03,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:03,322 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 03:01:03,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027507399] [2019-10-15 03:01:03,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:01:03,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:01:03,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603400884] [2019-10-15 03:01:03,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:01:03,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:03,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:01:03,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:01:03,325 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-10-15 03:01:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:03,378 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-10-15 03:01:03,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:01:03,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-15 03:01:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:03,379 INFO L225 Difference]: With dead ends: 21 [2019-10-15 03:01:03,380 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 03:01:03,381 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:01:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 03:01:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-15 03:01:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 03:01:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 03:01:03,386 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-10-15 03:01:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:03,387 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 03:01:03,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:01:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 03:01:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 03:01:03,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:03,388 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:03,389 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:03,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1243733017, now seen corresponding path program 1 times [2019-10-15 03:01:03,389 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:03,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798439628] [2019-10-15 03:01:03,390 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:03,390 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:03,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:01:03,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798439628] [2019-10-15 03:01:03,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625167391] [2019-10-15 03:01:03,460 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 03:01:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:03,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:01:03,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:01:03,577 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:01:03,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1375104107] [2019-10-15 03:01:03,676 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 03:01:03,676 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:03,689 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:03,697 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:03,698 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:03,878 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:04,178 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 03:01:04,192 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:04,198 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:04,589 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:04,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 11] total 19 [2019-10-15 03:01:04,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698235766] [2019-10-15 03:01:04,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 03:01:04,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:04,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 03:01:04,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-10-15 03:01:04,595 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 19 states. [2019-10-15 03:01:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:05,580 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-10-15 03:01:05,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 03:01:05,581 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2019-10-15 03:01:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:05,582 INFO L225 Difference]: With dead ends: 39 [2019-10-15 03:01:05,582 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:01:05,584 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 03:01:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:01:05,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:01:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:01:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-15 03:01:05,590 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-10-15 03:01:05,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:05,591 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-15 03:01:05,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 03:01:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-15 03:01:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:01:05,592 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:05,593 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:05,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:05,800 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:05,801 INFO L82 PathProgramCache]: Analyzing trace with hash 280735325, now seen corresponding path program 2 times [2019-10-15 03:01:05,801 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:05,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367777497] [2019-10-15 03:01:05,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:05,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:05,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:01:05,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367777497] [2019-10-15 03:01:05,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851924334] [2019-10-15 03:01:05,940 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:05,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:01:05,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:05,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:01:05,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 03:01:06,016 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 03:01:06,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061045252] [2019-10-15 03:01:06,090 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 03:01:06,090 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:06,091 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:06,092 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:06,092 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:06,138 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:06,378 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 03:01:06,408 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:06,449 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:07,004 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:07,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7, 11] total 25 [2019-10-15 03:01:07,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416361997] [2019-10-15 03:01:07,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 03:01:07,006 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:07,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 03:01:07,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-10-15 03:01:07,008 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 25 states. [2019-10-15 03:01:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:08,723 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2019-10-15 03:01:08,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-15 03:01:08,725 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2019-10-15 03:01:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:08,726 INFO L225 Difference]: With dead ends: 66 [2019-10-15 03:01:08,726 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 03:01:08,729 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=663, Invalid=2877, Unknown=0, NotChecked=0, Total=3540 [2019-10-15 03:01:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 03:01:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-15 03:01:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 03:01:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2019-10-15 03:01:08,737 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 24 [2019-10-15 03:01:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:08,738 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2019-10-15 03:01:08,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 03:01:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2019-10-15 03:01:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:01:08,739 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:08,739 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:08,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:08,946 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1071163863, now seen corresponding path program 3 times [2019-10-15 03:01:08,947 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:08,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827940485] [2019-10-15 03:01:08,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:08,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:08,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 03:01:09,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827940485] [2019-10-15 03:01:09,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511702912] [2019-10-15 03:01:09,176 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:09,268 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:01:09,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:09,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 03:01:09,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 03:01:09,301 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 03:01:09,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17081866] [2019-10-15 03:01:09,571 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 03:01:09,571 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:09,571 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:09,572 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:09,572 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:09,603 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:09,700 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 03:01:09,711 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:09,716 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:10,120 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:10,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13, 11] total 37 [2019-10-15 03:01:10,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088925941] [2019-10-15 03:01:10,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-15 03:01:10,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:10,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-15 03:01:10,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=999, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 03:01:10,124 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 37 states. [2019-10-15 03:01:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:13,515 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2019-10-15 03:01:13,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-10-15 03:01:13,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2019-10-15 03:01:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:13,517 INFO L225 Difference]: With dead ends: 120 [2019-10-15 03:01:13,518 INFO L226 Difference]: Without dead ends: 79 [2019-10-15 03:01:13,523 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2202, Invalid=8100, Unknown=0, NotChecked=0, Total=10302 [2019-10-15 03:01:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-15 03:01:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-15 03:01:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-15 03:01:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2019-10-15 03:01:13,536 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 42 [2019-10-15 03:01:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:13,536 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2019-10-15 03:01:13,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-15 03:01:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2019-10-15 03:01:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 03:01:13,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:13,539 INFO L380 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:13,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:13,744 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2103025601, now seen corresponding path program 4 times [2019-10-15 03:01:13,746 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:13,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499995948] [2019-10-15 03:01:13,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:13,747 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:13,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 03:01:14,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499995948] [2019-10-15 03:01:14,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276421065] [2019-10-15 03:01:14,273 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:14,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 03:01:14,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 03:01:14,399 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 03:01:15,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548280830] [2019-10-15 03:01:15,150 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 03:01:15,150 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:15,150 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:15,151 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:15,151 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:15,185 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:15,295 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 03:01:15,302 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:15,306 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:15,701 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:15,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25, 11] total 61 [2019-10-15 03:01:15,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315470504] [2019-10-15 03:01:15,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 03:01:15,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 03:01:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1209, Invalid=2451, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 03:01:15,705 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 61 states. [2019-10-15 03:01:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:25,082 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2019-10-15 03:01:25,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2019-10-15 03:01:25,083 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 78 [2019-10-15 03:01:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:25,085 INFO L225 Difference]: With dead ends: 228 [2019-10-15 03:01:25,086 INFO L226 Difference]: Without dead ends: 151 [2019-10-15 03:01:25,097 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9773 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=8195, Invalid=26214, Unknown=1, NotChecked=0, Total=34410 [2019-10-15 03:01:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-15 03:01:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-10-15 03:01:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-15 03:01:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2019-10-15 03:01:25,117 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 78 [2019-10-15 03:01:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:25,117 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2019-10-15 03:01:25,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-15 03:01:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2019-10-15 03:01:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 03:01:25,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:25,121 INFO L380 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:25,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:25,330 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2140019441, now seen corresponding path program 5 times [2019-10-15 03:01:25,331 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:25,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335860345] [2019-10-15 03:01:25,332 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:25,332 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:25,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 03:01:26,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335860345] [2019-10-15 03:01:26,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471983299] [2019-10-15 03:01:26,866 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