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_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:57,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:57,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:57,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:57,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:57,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:57,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:57,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:57,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:57,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:57,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:57,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:57,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:57,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:57,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:57,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:57,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:57,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:57,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:57,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:57,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:57,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:57,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:57,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:57,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:57,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:34:57,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:34:57,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:34:57,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:34:57,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:34:57,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:34:57,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:34:57,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:34:57,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:57,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:57,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:57,200 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 01:34:57,219 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:57,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:57,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:57,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:57,223 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:57,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:57,224 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:57,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:57,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:57,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:57,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:57,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:57,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:57,227 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:57,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:57,228 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:57,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:57,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:57,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:57,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:57,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:57,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:57,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:57,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:57,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:57,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:57,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:57,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:57,232 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 01:34:57,516 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:57,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:57,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:57,538 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:57,538 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:57,539 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2019-10-15 01:34:57,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f3984365/4e661fdfc0b44c57a78a8ff473e6452f/FLAGd9318108a [2019-10-15 01:34:58,127 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:58,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i [2019-10-15 01:34:58,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f3984365/4e661fdfc0b44c57a78a8ff473e6452f/FLAGd9318108a [2019-10-15 01:34:58,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f3984365/4e661fdfc0b44c57a78a8ff473e6452f [2019-10-15 01:34:58,470 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:58,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:58,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:58,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:58,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:58,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:58" (1/1) ... [2019-10-15 01:34:58,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e9c6b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58, skipping insertion in model container [2019-10-15 01:34:58,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:58" (1/1) ... [2019-10-15 01:34:58,489 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:58,504 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:58,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:58,688 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:58,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:58,820 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:58,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58 WrapperNode [2019-10-15 01:34:58,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:58,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:58,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:58,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:58,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58" (1/1) ... [2019-10-15 01:34:58,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58" (1/1) ... [2019-10-15 01:34:58,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58" (1/1) ... [2019-10-15 01:34:58,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58" (1/1) ... [2019-10-15 01:34:58,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58" (1/1) ... [2019-10-15 01:34:58,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58" (1/1) ... [2019-10-15 01:34:58,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58" (1/1) ... [2019-10-15 01:34:58,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:58,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:58,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:58,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:58,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58" (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 01:34:58,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:58,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:58,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:58,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:34:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:59,487 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:59,487 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:34:59,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:59 BoogieIcfgContainer [2019-10-15 01:34:59,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:59,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:59,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:59,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:59,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:58" (1/3) ... [2019-10-15 01:34:59,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a753e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:59, skipping insertion in model container [2019-10-15 01:34:59,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:58" (2/3) ... [2019-10-15 01:34:59,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a753e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:59, skipping insertion in model container [2019-10-15 01:34:59,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:59" (3/3) ... [2019-10-15 01:34:59,498 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2019-10-15 01:34:59,508 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:59,517 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:59,527 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:59,553 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:59,554 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:59,554 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:59,554 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:59,555 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:59,555 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:59,555 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:59,555 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:34:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:34:59,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:59,580 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:59,582 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:59,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:59,587 INFO L82 PathProgramCache]: Analyzing trace with hash 945226407, now seen corresponding path program 1 times [2019-10-15 01:34:59,594 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:59,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611647776] [2019-10-15 01:34:59,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:59,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:59,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:59,759 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 01:34:59,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611647776] [2019-10-15 01:34:59,761 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:59,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:59,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465257412] [2019-10-15 01:34:59,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:59,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:59,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:59,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:59,786 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:34:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:59,852 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2019-10-15 01:34:59,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:59,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:34:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:59,865 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:34:59,866 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 01:34:59,871 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 01:34:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 01:34:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-15 01:34:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 01:34:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-15 01:34:59,925 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2019-10-15 01:34:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:59,926 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-15 01:34:59,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-15 01:34:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:34:59,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:59,927 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:59,928 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:59,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1772269372, now seen corresponding path program 1 times [2019-10-15 01:34:59,928 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:59,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736641866] [2019-10-15 01:34:59,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:59,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:59,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:00,042 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 01:35:00,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736641866] [2019-10-15 01:35:00,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102085733] [2019-10-15 01:35:00,043 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 01:35:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:00,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:00,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:00,142 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 01:35:00,142 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:00,188 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 01:35:00,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1557150820] [2019-10-15 01:35:00,211 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:00,211 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:00,218 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:00,227 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:00,228 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:00,403 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:01,328 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:01,341 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:01,346 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:01,728 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:01,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:35:01,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500857888] [2019-10-15 01:35:01,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:35:01,731 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:01,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:35:01,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:35:01,733 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 17 states. [2019-10-15 01:35:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:02,367 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2019-10-15 01:35:02,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:35:02,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2019-10-15 01:35:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:02,369 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:35:02,369 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:35:02,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:35:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:35:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:35:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:35:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-15 01:35:02,385 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2019-10-15 01:35:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:02,389 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-15 01:35:02,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:35:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-15 01:35:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:35:02,390 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:02,391 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:02,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:02,605 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1883799143, now seen corresponding path program 2 times [2019-10-15 01:35:02,606 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:02,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126234126] [2019-10-15 01:35:02,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:02,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:02,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:02,772 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 01:35:02,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126234126] [2019-10-15 01:35:02,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990061398] [2019-10-15 01:35:02,773 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 01:35:02,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:02,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:02,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:35:02,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:02,877 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 01:35:02,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:02,936 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 01:35:02,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60314824] [2019-10-15 01:35:02,939 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:02,939 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:02,940 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:02,941 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:02,941 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:02,976 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:03,560 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:03,583 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:03,588 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:03,829 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:03,829 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:35:03,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102625612] [2019-10-15 01:35:03,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:35:03,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:03,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:35:03,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:35:03,832 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 23 states. [2019-10-15 01:35:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:04,804 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2019-10-15 01:35:04,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-15 01:35:04,804 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 24 [2019-10-15 01:35:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:04,805 INFO L225 Difference]: With dead ends: 58 [2019-10-15 01:35:04,805 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:35:04,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=539, Invalid=1911, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:35:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:35:04,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-15 01:35:04,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 01:35:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-10-15 01:35:04,817 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 24 [2019-10-15 01:35:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:04,818 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-10-15 01:35:04,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:35:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-10-15 01:35:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:35:04,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:04,820 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:05,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:05,024 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:05,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1126640647, now seen corresponding path program 3 times [2019-10-15 01:35:05,025 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:05,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823288814] [2019-10-15 01:35:05,026 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,278 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 01:35:05,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823288814] [2019-10-15 01:35:05,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328268668] [2019-10-15 01:35:05,280 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:35:05,394 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:05,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:05,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:35:05,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:05,424 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 01:35:05,424 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:05,633 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 01:35:05,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18572673] [2019-10-15 01:35:05,635 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:05,635 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:05,635 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:05,636 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:05,636 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:05,663 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:06,075 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:06,085 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:06,090 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:06,389 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:06,390 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:35:06,390 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623447282] [2019-10-15 01:35:06,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:35:06,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:06,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:35:06,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:35:06,393 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 35 states. [2019-10-15 01:35:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:08,671 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2019-10-15 01:35:08,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-15 01:35:08,672 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-15 01:35:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:08,674 INFO L225 Difference]: With dead ends: 106 [2019-10-15 01:35:08,674 INFO L226 Difference]: Without dead ends: 79 [2019-10-15 01:35:08,678 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1871, Invalid=5439, Unknown=0, NotChecked=0, Total=7310 [2019-10-15 01:35:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-15 01:35:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-15 01:35:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-15 01:35:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2019-10-15 01:35:08,693 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 42 [2019-10-15 01:35:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:08,693 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2019-10-15 01:35:08,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:35:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2019-10-15 01:35:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:35:08,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:08,696 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:08,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:08,906 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:08,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1289318585, now seen corresponding path program 4 times [2019-10-15 01:35:08,907 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:08,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110239532] [2019-10-15 01:35:08,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:08,909 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:08,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:09,332 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 01:35:09,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110239532] [2019-10-15 01:35:09,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741577033] [2019-10-15 01:35:09,333 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 01:35:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:09,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:35:09,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:09,508 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 01:35:09,509 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:10,409 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 01:35:10,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [793528204] [2019-10-15 01:35:10,413 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:10,413 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:10,414 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:10,414 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:10,414 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:10,444 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:10,867 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:10,875 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:10,878 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:11,201 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:11,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-15 01:35:11,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099051638] [2019-10-15 01:35:11,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:35:11,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:11,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:35:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:35:11,206 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 59 states. [2019-10-15 01:35:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:17,104 INFO L93 Difference]: Finished difference Result 202 states and 277 transitions. [2019-10-15 01:35:17,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-10-15 01:35:17,104 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2019-10-15 01:35:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:17,106 INFO L225 Difference]: With dead ends: 202 [2019-10-15 01:35:17,107 INFO L226 Difference]: Without dead ends: 151 [2019-10-15 01:35:17,113 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6549 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7127, Invalid=17679, Unknown=0, NotChecked=0, Total=24806 [2019-10-15 01:35:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-15 01:35:17,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-10-15 01:35:17,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-15 01:35:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2019-10-15 01:35:17,135 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 78 [2019-10-15 01:35:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:17,136 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2019-10-15 01:35:17,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:35:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2019-10-15 01:35:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 01:35:17,141 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:17,141 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:17,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:17,348 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1805290041, now seen corresponding path program 5 times [2019-10-15 01:35:17,349 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:17,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871275720] [2019-10-15 01:35:17,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:17,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:17,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-10-15 01:35:18,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871275720] [2019-10-15 01:35:18,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505429381] [2019-10-15 01:35:18,551 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