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_init1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:34:19,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:34:19,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:34:19,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:34:19,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:34:19,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:34:19,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:34:19,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:34:19,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:34:19,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:34:19,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:34:19,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:34:19,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:34:19,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:34:19,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:34:19,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:34:19,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:34:19,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:34:19,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:34:19,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:34:19,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:34:19,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:34:19,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:34:19,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:34:19,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:34:19,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:34:19,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:34:19,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:34:19,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:34:19,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:34:19,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:34:19,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:34:19,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:34:19,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:34:19,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:34:19,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:34:19,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:34:19,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:34:19,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:34:19,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:34:19,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:34:19,519 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 [2019-10-13 21:34:19,534 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:34:19,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:34:19,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:34:19,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:34:19,536 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:34:19,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:34:19,538 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:34:19,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:34:19,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:34:19,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:34:19,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:34:19,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:34:19,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:34:19,539 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:34:19,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:34:19,540 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:34:19,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:34:19,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:34:19,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:34:19,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:34:19,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:34:19,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:34:19,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:34:19,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:34:19,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:34:19,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:34:19,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:34:19,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:34:19,543 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 [2019-10-13 21:34:19,834 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:34:19,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:34:19,852 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:34:19,854 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:34:19,854 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:34:19,855 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-10-13 21:34:19,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc7aefaf/be3b6711a71e4d15b2071fa5ad72ccdf/FLAG6cd20f176 [2019-10-13 21:34:20,374 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:34:20,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-10-13 21:34:20,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc7aefaf/be3b6711a71e4d15b2071fa5ad72ccdf/FLAG6cd20f176 [2019-10-13 21:34:20,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc7aefaf/be3b6711a71e4d15b2071fa5ad72ccdf [2019-10-13 21:34:20,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:34:20,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:34:20,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:34:20,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:34:20,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:34:20,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:34:20" (1/1) ... [2019-10-13 21:34:20,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae0ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:20, skipping insertion in model container [2019-10-13 21:34:20,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:34:20" (1/1) ... [2019-10-13 21:34:20,800 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:34:20,816 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:34:20,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:34:21,001 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:34:21,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:34:21,037 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:34:21,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21 WrapperNode [2019-10-13 21:34:21,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:34:21,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:34:21,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:34:21,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:34:21,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21" (1/1) ... [2019-10-13 21:34:21,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21" (1/1) ... [2019-10-13 21:34:21,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21" (1/1) ... [2019-10-13 21:34:21,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21" (1/1) ... [2019-10-13 21:34:21,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21" (1/1) ... [2019-10-13 21:34:21,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21" (1/1) ... [2019-10-13 21:34:21,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21" (1/1) ... [2019-10-13 21:34:21,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:34:21,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:34:21,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:34:21,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:34:21,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21" (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 [2019-10-13 21:34:21,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:34:21,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:34:21,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:34:21,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:34:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:34:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:34:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:34:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:34:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:34:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:34:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:34:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:34:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:34:21,499 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:34:21,500 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 21:34:21,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:34:21 BoogieIcfgContainer [2019-10-13 21:34:21,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:34:21,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:34:21,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:34:21,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:34:21,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:34:20" (1/3) ... [2019-10-13 21:34:21,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc96f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:34:21, skipping insertion in model container [2019-10-13 21:34:21,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:21" (2/3) ... [2019-10-13 21:34:21,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc96f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:34:21, skipping insertion in model container [2019-10-13 21:34:21,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:34:21" (3/3) ... [2019-10-13 21:34:21,515 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-2.i [2019-10-13 21:34:21,525 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:34:21,536 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:34:21,547 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:34:21,575 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:34:21,576 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:34:21,576 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:34:21,576 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:34:21,576 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:34:21,576 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:34:21,576 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:34:21,577 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:34:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-13 21:34:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:34:21,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:34:21,595 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:34:21,597 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:34:21,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:34:21,603 INFO L82 PathProgramCache]: Analyzing trace with hash 243563535, now seen corresponding path program 1 times [2019-10-13 21:34:21,610 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:34:21,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295287576] [2019-10-13 21:34:21,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:21,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:21,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:34:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:34:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:21,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295287576] [2019-10-13 21:34:21,780 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:34:21,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:34:21,780 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018953132] [2019-10-13 21:34:21,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:34:21,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:34:21,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:34:21,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:34:21,805 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-10-13 21:34:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:34:21,834 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-13 21:34:21,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:34:21,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-13 21:34:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:34:21,845 INFO L225 Difference]: With dead ends: 31 [2019-10-13 21:34:21,845 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 21:34:21,852 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 [2019-10-13 21:34:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 21:34:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 21:34:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 21:34:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-13 21:34:21,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-10-13 21:34:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:34:21,893 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-13 21:34:21,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:34:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-13 21:34:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 21:34:21,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:34:21,895 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:34:21,895 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:34:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:34:21,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1400307069, now seen corresponding path program 1 times [2019-10-13 21:34:21,896 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:34:21,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270007750] [2019-10-13 21:34:21,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:21,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:21,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:34:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:34:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:21,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270007750] [2019-10-13 21:34:21,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658777065] [2019-10-13 21:34:21,957 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 [2019-10-13 21:34:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:34:22,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:34:22,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:34:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:22,049 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:34:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:22,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [802217879] [2019-10-13 21:34:22,113 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-13 21:34:22,114 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:34:22,126 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:34:22,135 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:34:22,136 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:34:22,315 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:34:22,818 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-13 21:34:22,846 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:34:22,856 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:34:22,857 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:34:22,858 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 91#(and (exists ((v_prenex_1 Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0) 42)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= (select (select |#memory_int| v_prenex_1) 0) 42) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:22,858 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:22,859 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:22,859 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 110#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:22,859 INFO L193 IcfgInterpreter]: Reachable states at location L12 satisfy 81#(and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (= |main_#t~mem1| (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~x~0 4) |main_~#a~0.offset|))) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (< main_~i~0 100000)) (<= main_~x~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 main_~x~0) (< main_~x~0 100000) (= main_~x~0 0) (<= 100000 main_~i~0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) [2019-10-13 21:34:22,860 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 96#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (exists ((v_prenex_1 Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0) 42)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= (select (select |#memory_int| v_prenex_1) 0) 42) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:22,861 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:34:22,861 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 105#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:34:22,863 INFO L193 IcfgInterpreter]: Reachable states at location L11-3 satisfy 76#(and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (< main_~i~0 100000)) (<= main_~x~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 main_~x~0) (= main_~x~0 0) (<= 100000 main_~i~0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) [2019-10-13 21:34:22,864 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 86#(exists ((v_prenex_1 Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0) 42)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= (select (select |#memory_int| v_prenex_1) 0) 42) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:34:22,865 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 101#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (exists ((v_prenex_1 Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0) 42)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= (select (select |#memory_int| v_prenex_1) 0) 42) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:22,866 INFO L193 IcfgInterpreter]: Reachable states at location L6-2 satisfy 71#(and (or (and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) (and (< |main_~#a~0.base| |#StackHeapBarrier|) (= |#length| (store |old(#length)| |main_~#a~0.base| 400000)) (<= 0 main_~i~0) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (= 0 |main_~#a~0.base|)) (= 0 (select |old(#valid)| |main_~#a~0.base|)) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (= |#valid| (store |old(#valid)| |main_~#a~0.base| 1)) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0) (= |main_~#a~0.offset| 0))) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:23,386 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:34:23,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-13 21:34:23,387 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290678228] [2019-10-13 21:34:23,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 21:34:23,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:34:23,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 21:34:23,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:34:23,396 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 17 states. [2019-10-13 21:34:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:34:24,110 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-10-13 21:34:24,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 21:34:24,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 12 [2019-10-13 21:34:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:34:24,114 INFO L225 Difference]: With dead ends: 37 [2019-10-13 21:34:24,114 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 21:34:24,116 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-13 21:34:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 21:34:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2019-10-13 21:34:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 21:34:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-13 21:34:24,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2019-10-13 21:34:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:34:24,138 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-13 21:34:24,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 21:34:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-13 21:34:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 21:34:24,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:34:24,141 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:34:24,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:34:24,348 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:34:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:34:24,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1364428529, now seen corresponding path program 2 times [2019-10-13 21:34:24,350 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:34:24,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803454076] [2019-10-13 21:34:24,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:24,351 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:24,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:34:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:34:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:24,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803454076] [2019-10-13 21:34:24,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730439755] [2019-10-13 21:34:24,464 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 [2019-10-13 21:34:24,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 21:34:24,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:34:24,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:34:24,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:34:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:24,575 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:34:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:24,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1452672937] [2019-10-13 21:34:24,658 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-13 21:34:24,659 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:34:24,659 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:34:24,659 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:34:24,660 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:34:24,704 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:34:24,978 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-13 21:34:24,998 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:34:25,010 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:34:25,010 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:34:25,011 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 91#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (v_prenex_2 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (not (= 42 (select (select |#memory_int| v_prenex_2) 0))) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= 42 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:25,011 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:25,011 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:25,012 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 110#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:25,012 INFO L193 IcfgInterpreter]: Reachable states at location L12 satisfy 81#(and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (= |main_#t~mem1| (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~x~0 4) |main_~#a~0.offset|))) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (< main_~i~0 100000)) (<= main_~x~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 main_~x~0) (< main_~x~0 100000) (= main_~x~0 0) (<= 100000 main_~i~0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) [2019-10-13 21:34:25,012 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 96#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (v_prenex_2 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (not (= 42 (select (select |#memory_int| v_prenex_2) 0))) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= 42 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:25,012 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:34:25,013 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 105#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:34:25,013 INFO L193 IcfgInterpreter]: Reachable states at location L11-3 satisfy 76#(and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (< main_~i~0 100000)) (<= main_~x~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 main_~x~0) (= main_~x~0 0) (<= 100000 main_~i~0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) [2019-10-13 21:34:25,013 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 86#(exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (v_prenex_2 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (not (= 42 (select (select |#memory_int| v_prenex_2) 0))) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= 42 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:34:25,014 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 101#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (v_prenex_2 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (not (= 42 (select (select |#memory_int| v_prenex_2) 0))) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= 42 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:25,015 INFO L193 IcfgInterpreter]: Reachable states at location L6-2 satisfy 71#(and (or (and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) (and (< |main_~#a~0.base| |#StackHeapBarrier|) (= |#length| (store |old(#length)| |main_~#a~0.base| 400000)) (<= 0 main_~i~0) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (= 0 |main_~#a~0.base|)) (= 0 (select |old(#valid)| |main_~#a~0.base|)) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (= |#valid| (store |old(#valid)| |main_~#a~0.base| 1)) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0) (= |main_~#a~0.offset| 0))) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:25,457 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:34:25,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-13 21:34:25,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451452318] [2019-10-13 21:34:25,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 21:34:25,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:34:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 21:34:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-13 21:34:25,462 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 23 states. [2019-10-13 21:34:26,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:34:26,367 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-10-13 21:34:26,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 21:34:26,368 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 15 [2019-10-13 21:34:26,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:34:26,370 INFO L225 Difference]: With dead ends: 43 [2019-10-13 21:34:26,370 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 21:34:26,374 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 21:34:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 21:34:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-10-13 21:34:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 21:34:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-13 21:34:26,385 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-10-13 21:34:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:34:26,386 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-13 21:34:26,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 21:34:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-13 21:34:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 21:34:26,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:34:26,389 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:34:26,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:34:26,601 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:34:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:34:26,602 INFO L82 PathProgramCache]: Analyzing trace with hash 883442831, now seen corresponding path program 3 times [2019-10-13 21:34:26,602 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:34:26,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890883739] [2019-10-13 21:34:26,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:26,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:26,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:34:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:34:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:26,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890883739] [2019-10-13 21:34:26,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818473606] [2019-10-13 21:34:26,770 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 [2019-10-13 21:34:26,837 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 21:34:26,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:34:26,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:34:26,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:34:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:26,862 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:34:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:27,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903086750] [2019-10-13 21:34:27,068 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-13 21:34:27,068 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:34:27,068 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:34:27,068 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:34:27,069 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:34:27,102 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:34:27,248 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-13 21:34:27,276 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:34:27,288 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:34:27,288 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:34:27,292 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 91#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (v_prenex_3 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) 42)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (= (select (select |#memory_int| v_prenex_3) 0) 42) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:27,293 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:27,293 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:27,293 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 110#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:27,294 INFO L193 IcfgInterpreter]: Reachable states at location L12 satisfy 81#(and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (= |main_#t~mem1| (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~x~0 4) |main_~#a~0.offset|))) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (< main_~i~0 100000)) (<= main_~x~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 main_~x~0) (< main_~x~0 100000) (= main_~x~0 0) (<= 100000 main_~i~0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) [2019-10-13 21:34:27,294 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 96#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (v_prenex_3 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) 42)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (= (select (select |#memory_int| v_prenex_3) 0) 42) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:27,294 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:34:27,294 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 105#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:34:27,294 INFO L193 IcfgInterpreter]: Reachable states at location L11-3 satisfy 76#(and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (< main_~i~0 100000)) (<= main_~x~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 main_~x~0) (= main_~x~0 0) (<= 100000 main_~i~0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) [2019-10-13 21:34:27,295 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 86#(exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (v_prenex_3 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) 42)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (= (select (select |#memory_int| v_prenex_3) 0) 42) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:34:27,295 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 101#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (v_prenex_3 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) 42)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (= (select (select |#memory_int| v_prenex_3) 0) 42) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:27,295 INFO L193 IcfgInterpreter]: Reachable states at location L6-2 satisfy 71#(and (or (and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) (and (< |main_~#a~0.base| |#StackHeapBarrier|) (= |#length| (store |old(#length)| |main_~#a~0.base| 400000)) (<= 0 main_~i~0) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (= 0 |main_~#a~0.base|)) (= 0 (select |old(#valid)| |main_~#a~0.base|)) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (= |#valid| (store |old(#valid)| |main_~#a~0.base| 1)) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0) (= |main_~#a~0.offset| 0))) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:27,724 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:34:27,724 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-13 21:34:27,725 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029563611] [2019-10-13 21:34:27,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 21:34:27,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:34:27,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 21:34:27,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 21:34:27,727 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 35 states. [2019-10-13 21:34:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:34:29,114 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2019-10-13 21:34:29,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 21:34:29,115 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 21 [2019-10-13 21:34:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:34:29,116 INFO L225 Difference]: With dead ends: 55 [2019-10-13 21:34:29,117 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 21:34:29,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-13 21:34:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 21:34:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-10-13 21:34:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 21:34:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-13 21:34:29,145 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 21 [2019-10-13 21:34:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:34:29,150 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-13 21:34:29,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 21:34:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-13 21:34:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 21:34:29,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:34:29,152 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:34:29,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:34:29,358 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:34:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:34:29,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1549534321, now seen corresponding path program 4 times [2019-10-13 21:34:29,359 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:34:29,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991745997] [2019-10-13 21:34:29,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:29,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:29,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:34:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:34:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:29,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991745997] [2019-10-13 21:34:29,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88697633] [2019-10-13 21:34:29,701 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 [2019-10-13 21:34:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:34:29,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 21:34:29,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:34:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:29,800 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:34:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:30,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188104164] [2019-10-13 21:34:30,494 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-13 21:34:30,494 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:34:30,495 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:34:30,495 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:34:30,495 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:34:30,522 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:34:30,632 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-13 21:34:30,639 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:34:30,643 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:34:30,643 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:34:30,644 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 91#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (v_prenex_4 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) 42)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (= (select (select |#memory_int| v_prenex_4) 0) 42) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:30,644 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:30,644 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:30,644 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 110#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:30,645 INFO L193 IcfgInterpreter]: Reachable states at location L12 satisfy 81#(and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (= |main_#t~mem1| (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~x~0 4) |main_~#a~0.offset|))) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (< main_~i~0 100000)) (<= main_~x~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 main_~x~0) (< main_~x~0 100000) (= main_~x~0 0) (<= 100000 main_~i~0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) [2019-10-13 21:34:30,645 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 96#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (v_prenex_4 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) 42)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (= (select (select |#memory_int| v_prenex_4) 0) 42) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:30,645 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:34:30,645 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 105#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:34:30,646 INFO L193 IcfgInterpreter]: Reachable states at location L11-3 satisfy 76#(and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (< main_~i~0 100000)) (<= main_~x~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 main_~x~0) (= main_~x~0 0) (<= 100000 main_~i~0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) [2019-10-13 21:34:30,646 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 86#(exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (v_prenex_4 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) 42)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (= (select (select |#memory_int| v_prenex_4) 0) 42) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:34:30,646 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 101#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (v_prenex_4 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) 42)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (= (select (select |#memory_int| v_prenex_4) 0) 42) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:34:30,646 INFO L193 IcfgInterpreter]: Reachable states at location L6-2 satisfy 71#(and (or (and (= |#NULL.base| 0) (<= 0 main_~i~0) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (= |#NULL.offset| 0) (= |main_~#a~0.offset| 0)) (and (< |main_~#a~0.base| |#StackHeapBarrier|) (= |#length| (store |old(#length)| |main_~#a~0.base| 400000)) (<= 0 main_~i~0) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |main_~#a~0.offset|) (<= 0 |#NULL.base|) (<= |main_~#a~0.offset| 0) (not (= 0 |main_~#a~0.base|)) (= 0 (select |old(#valid)| |main_~#a~0.base|)) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (= |#valid| (store |old(#valid)| |main_~#a~0.base| 1)) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0) (= |main_~#a~0.offset| 0))) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:34:31,128 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:34:31,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-13 21:34:31,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822758776] [2019-10-13 21:34:31,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-13 21:34:31,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:34:31,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-13 21:34:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-13 21:34:31,133 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 59 states. [2019-10-13 21:34:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:34:34,463 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2019-10-13 21:34:34,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-13 21:34:34,466 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 33 [2019-10-13 21:34:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:34:34,467 INFO L225 Difference]: With dead ends: 79 [2019-10-13 21:34:34,468 INFO L226 Difference]: Without dead ends: 70 [2019-10-13 21:34:34,473 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-13 21:34:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-13 21:34:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2019-10-13 21:34:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 21:34:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2019-10-13 21:34:34,493 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 33 [2019-10-13 21:34:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:34:34,493 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2019-10-13 21:34:34,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-13 21:34:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2019-10-13 21:34:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 21:34:34,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:34:34,495 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:34:34,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:34:34,699 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:34:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:34:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1865684593, now seen corresponding path program 5 times [2019-10-13 21:34:34,700 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:34:34,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439987415] [2019-10-13 21:34:34,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:34,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:34:34,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:34:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:34:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:34:35,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439987415] [2019-10-13 21:34:35,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003881431] [2019-10-13 21:34:35,775 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