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-multidimensional/rev-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:38:11,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:38:11,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:38:11,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:38:11,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:38:11,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:38:11,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:38:11,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:38:11,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:38:11,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:38:11,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:38:11,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:38:11,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:38:11,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:38:11,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:38:11,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:38:11,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:38:11,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:38:11,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:38:11,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:38:11,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:38:11,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:38:11,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:38:11,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:38:11,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:38:11,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:38:11,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:38:11,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:38:11,115 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 21:38:11,129 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:38:11,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:38:11,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:38:11,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:38:11,130 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:38:11,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:38:11,131 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:38:11,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:38:11,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:38:11,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:38:11,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:38:11,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:38:11,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:38:11,132 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:38:11,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:38:11,133 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:38:11,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:38:11,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:38:11,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:38:11,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:38:11,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:38:11,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:38:11,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:38:11,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:38:11,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:38:11,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:38:11,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:38:11,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:38:11,135 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 21:38:11,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:38:11,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:38:11,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:38:11,435 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:38:11,435 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:38:11,436 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-10-13 21:38:11,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0a46887/09e89b6786cb4ad79d6fbe4284a2afcc/FLAGa99c15870 [2019-10-13 21:38:11,916 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:38:11,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-10-13 21:38:11,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0a46887/09e89b6786cb4ad79d6fbe4284a2afcc/FLAGa99c15870 [2019-10-13 21:38:12,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0a46887/09e89b6786cb4ad79d6fbe4284a2afcc [2019-10-13 21:38:12,332 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:38:12,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:38:12,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:38:12,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:38:12,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:38:12,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:12" (1/1) ... [2019-10-13 21:38:12,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@580da5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12, skipping insertion in model container [2019-10-13 21:38:12,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:12" (1/1) ... [2019-10-13 21:38:12,351 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:38:12,375 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:38:12,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:38:12,586 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:38:12,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:38:12,723 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:38:12,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12 WrapperNode [2019-10-13 21:38:12,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:38:12,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:38:12,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:38:12,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:38:12,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12" (1/1) ... [2019-10-13 21:38:12,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12" (1/1) ... [2019-10-13 21:38:12,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12" (1/1) ... [2019-10-13 21:38:12,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12" (1/1) ... [2019-10-13 21:38:12,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12" (1/1) ... [2019-10-13 21:38:12,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12" (1/1) ... [2019-10-13 21:38:12,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12" (1/1) ... [2019-10-13 21:38:12,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:38:12,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:38:12,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:38:12,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:38:12,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12" (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 21:38:12,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:38:12,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:38:12,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:38:12,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:38:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:38:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:38:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:38:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:38:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:38:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:38:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:38:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:38:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:38:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:38:13,256 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:38:13,257 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-13 21:38:13,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:13 BoogieIcfgContainer [2019-10-13 21:38:13,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:38:13,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:38:13,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:38:13,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:38:13,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:38:12" (1/3) ... [2019-10-13 21:38:13,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d00f8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:13, skipping insertion in model container [2019-10-13 21:38:13,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:12" (2/3) ... [2019-10-13 21:38:13,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d00f8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:13, skipping insertion in model container [2019-10-13 21:38:13,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:13" (3/3) ... [2019-10-13 21:38:13,267 INFO L109 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2019-10-13 21:38:13,278 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:38:13,285 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:38:13,296 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:38:13,316 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:38:13,317 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:38:13,317 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:38:13,317 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:38:13,317 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:38:13,317 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:38:13,317 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:38:13,317 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:38:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-13 21:38:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 21:38:13,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:13,335 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:13,337 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:13,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1848676113, now seen corresponding path program 1 times [2019-10-13 21:38:13,351 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:13,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094927930] [2019-10-13 21:38:13,352 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:13,352 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:13,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:13,431 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:13,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986822315] [2019-10-13 21:38:13,432 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 21:38:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:13,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:38:13,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:13,565 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 21:38:13,566 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:13,596 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 21:38:13,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094927930] [2019-10-13 21:38:13,599 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:13,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986822315] [2019-10-13 21:38:13,600 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:38:13,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-13 21:38:13,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022321421] [2019-10-13 21:38:13,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:38:13,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:38:13,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:38:13,621 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-10-13 21:38:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:13,720 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-10-13 21:38:13,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:38:13,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 21:38:13,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:13,731 INFO L225 Difference]: With dead ends: 46 [2019-10-13 21:38:13,732 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 21:38:13,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:38:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 21:38:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 21:38:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 21:38:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-10-13 21:38:13,777 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-10-13 21:38:13,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:13,777 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-10-13 21:38:13,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:38:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-10-13 21:38:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 21:38:13,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:13,780 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:13,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:13,985 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:13,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:13,986 INFO L82 PathProgramCache]: Analyzing trace with hash -384845105, now seen corresponding path program 1 times [2019-10-13 21:38:13,986 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:13,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405197544] [2019-10-13 21:38:13,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:13,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:13,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:14,003 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:14,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165881293] [2019-10-13 21:38:14,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:14,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:38:14,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:38:14,087 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:38:14,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405197544] [2019-10-13 21:38:14,121 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:14,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165881293] [2019-10-13 21:38:14,122 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:38:14,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-13 21:38:14,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622404912] [2019-10-13 21:38:14,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:38:14,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:38:14,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:38:14,126 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-10-13 21:38:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:14,288 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2019-10-13 21:38:14,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:38:14,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-13 21:38:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:14,293 INFO L225 Difference]: With dead ends: 60 [2019-10-13 21:38:14,293 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 21:38:14,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:38:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 21:38:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-13 21:38:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 21:38:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2019-10-13 21:38:14,337 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 18 [2019-10-13 21:38:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:14,337 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2019-10-13 21:38:14,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:38:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2019-10-13 21:38:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 21:38:14,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:14,340 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:14,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:14,541 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:14,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1931678267, now seen corresponding path program 1 times [2019-10-13 21:38:14,542 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:14,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043426249] [2019-10-13 21:38:14,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:14,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:14,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:14,550 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:14,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486724182] [2019-10-13 21:38:14,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:38:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:14,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:38:14,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:38:14,645 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:38:14,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043426249] [2019-10-13 21:38:14,676 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:14,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486724182] [2019-10-13 21:38:14,677 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:38:14,677 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-13 21:38:14,677 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700809530] [2019-10-13 21:38:14,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:38:14,678 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:38:14,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:38:14,680 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 6 states. [2019-10-13 21:38:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:14,792 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-10-13 21:38:14,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:38:14,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-13 21:38:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:14,794 INFO L225 Difference]: With dead ends: 94 [2019-10-13 21:38:14,795 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 21:38:14,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:38:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 21:38:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-13 21:38:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-13 21:38:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2019-10-13 21:38:14,809 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 26 [2019-10-13 21:38:14,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:14,810 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2019-10-13 21:38:14,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:38:14,810 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2019-10-13 21:38:14,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 21:38:14,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:14,811 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:15,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:15,021 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1212850107, now seen corresponding path program 1 times [2019-10-13 21:38:15,021 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:15,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736500997] [2019-10-13 21:38:15,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:15,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:15,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:15,031 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:15,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862857384] [2019-10-13 21:38:15,032 INFO L94 rtionOrderModulation]: Keeping assertion order 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 21:38:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:15,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:38:15,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 21:38:15,137 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 21:38:15,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736500997] [2019-10-13 21:38:15,182 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:15,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862857384] [2019-10-13 21:38:15,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536858475] [2019-10-13 21:38:15,213 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-13 21:38:15,213 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:38:15,220 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:38:15,229 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:38:15,230 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:38:15,471 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:38:16,284 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-13 21:38:16,308 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:38:16,321 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:38:16,322 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:38:16,322 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 200#(or (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= 0 |#NULL.base|) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (<= |main_~#B~0.offset| 0) (not (= 0 |main_~#A~0.base|)) (= main_~n~0 1000) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#valid| (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1)) (= (select |old(#valid)| |main_~#A~0.base|) 0) (<= 0 |main_~#A~0.offset|) (< |main_~#B~0.base| |#StackHeapBarrier|) (<= 0 main_~k~0) (<= |#NULL.base| 0) (= (select (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base|) 0) (not (= |main_~#B~0.base| 0)) (= 0 |main_~#B~0.offset|) (<= 1000 main_~n~0) (= (store (store |old(#length)| |main_~#A~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |main_~#B~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |#length|) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 |main_~#B~0.offset|) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0) (<= main_~n~0 1000)) (not (< main_~j~0 main_~n~0))) [2019-10-13 21:38:16,323 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 337#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:38:16,323 INFO L193 IcfgInterpreter]: Reachable states at location L68-2 satisfy 261#(and (<= main_~n~0 0) (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (<= main_~i~0 0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:16,323 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 333#(and (<= __VERIFIER_assert_~cond 0) (exists ((v_main_~n~0_BEFORE_CALL_1 Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (|v_main_~#B~0.offset_BEFORE_CALL_1| Int) (|v_main_~#A~0.offset_BEFORE_CALL_1| Int) (|v_main_~#B~0.base_BEFORE_CALL_1| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) (+ (* v_main_~n~0_BEFORE_CALL_1 4) (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* v_main_~n~0_BEFORE_CALL_1 4)) |v_main_~#B~0.offset_BEFORE_CALL_1| (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_1 4) v_main_~n~0_BEFORE_CALL_1)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|))) (<= v_main_~n~0_BEFORE_CALL_1 0) (< 0 v_main_~n~0_BEFORE_CALL_1)) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) (+ (* v_main_~n~0_BEFORE_CALL_1 4) (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* v_main_~n~0_BEFORE_CALL_1 4)) |v_main_~#B~0.offset_BEFORE_CALL_1| (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_1 4) v_main_~n~0_BEFORE_CALL_1)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|)) (<= v_main_~n~0_BEFORE_CALL_1 0) (< 0 v_main_~n~0_BEFORE_CALL_1)))) (<= 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 21:38:16,324 INFO L193 IcfgInterpreter]: Reachable states at location L27-2 satisfy 195#true [2019-10-13 21:38:16,324 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 323#(and (exists ((v_main_~n~0_BEFORE_CALL_1 Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (|v_main_~#B~0.offset_BEFORE_CALL_1| Int) (|v_main_~#A~0.offset_BEFORE_CALL_1| Int) (|v_main_~#B~0.base_BEFORE_CALL_1| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) (+ (* v_main_~n~0_BEFORE_CALL_1 4) (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* v_main_~n~0_BEFORE_CALL_1 4)) |v_main_~#B~0.offset_BEFORE_CALL_1| (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_1 4) v_main_~n~0_BEFORE_CALL_1)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|))) (<= v_main_~n~0_BEFORE_CALL_1 0) (< 0 v_main_~n~0_BEFORE_CALL_1)) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) (+ (* v_main_~n~0_BEFORE_CALL_1 4) (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* v_main_~n~0_BEFORE_CALL_1 4)) |v_main_~#B~0.offset_BEFORE_CALL_1| (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_1 4) v_main_~n~0_BEFORE_CALL_1)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|)) (<= v_main_~n~0_BEFORE_CALL_1 0) (< 0 v_main_~n~0_BEFORE_CALL_1)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:16,324 INFO L193 IcfgInterpreter]: Reachable states at location L69 satisfy 246#(and (<= main_~n~0 0) (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (= (select (select |#memory_int| |main_~#B~0.base|) (+ (* (+ (* main_~j~0 (- 1)) main_~n~0 (- 1)) (* main_~n~0 4)) (* (+ (* main_~i~0 (- 1)) main_~n~0 (- 1)) (* (* main_~n~0 4) main_~n~0)) |main_~#B~0.offset| (* main_~k~0 (- 4)) (* main_~n~0 4) (- 4))) |main_#t~mem3|) (<= main_~i~0 0) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~k~0 4) (* main_~i~0 (* (* main_~n~0 4) main_~n~0)) (* main_~j~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem2|) (< main_~k~0 main_~n~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:16,324 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 21:38:16,325 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 21:38:16,325 INFO L193 IcfgInterpreter]: Reachable states at location L29-2 satisfy 314#(<= 0 main_~k~0) [2019-10-13 21:38:16,325 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 342#(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 21:38:16,325 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:38:16,326 INFO L193 IcfgInterpreter]: Reachable states at location L63-2 satisfy 276#(and (<= main_~n~0 0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:16,326 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 328#(and (<= __VERIFIER_assert_~cond 0) (exists ((v_main_~n~0_BEFORE_CALL_1 Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (|v_main_~#B~0.offset_BEFORE_CALL_1| Int) (|v_main_~#A~0.offset_BEFORE_CALL_1| Int) (|v_main_~#B~0.base_BEFORE_CALL_1| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) (+ (* v_main_~n~0_BEFORE_CALL_1 4) (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* v_main_~n~0_BEFORE_CALL_1 4)) |v_main_~#B~0.offset_BEFORE_CALL_1| (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_1 4) v_main_~n~0_BEFORE_CALL_1)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|))) (<= v_main_~n~0_BEFORE_CALL_1 0) (< 0 v_main_~n~0_BEFORE_CALL_1)) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) (+ (* v_main_~n~0_BEFORE_CALL_1 4) (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* v_main_~n~0_BEFORE_CALL_1 4)) |v_main_~#B~0.offset_BEFORE_CALL_1| (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_1 4) v_main_~n~0_BEFORE_CALL_1)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|)) (<= v_main_~n~0_BEFORE_CALL_1 0) (< 0 v_main_~n~0_BEFORE_CALL_1)))) (<= 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 21:38:16,326 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 318#(exists ((v_main_~n~0_BEFORE_CALL_1 Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (|v_main_~#B~0.offset_BEFORE_CALL_1| Int) (|v_main_~#A~0.offset_BEFORE_CALL_1| Int) (|v_main_~#B~0.base_BEFORE_CALL_1| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) (+ (* v_main_~n~0_BEFORE_CALL_1 4) (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* v_main_~n~0_BEFORE_CALL_1 4)) |v_main_~#B~0.offset_BEFORE_CALL_1| (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_1 4) v_main_~n~0_BEFORE_CALL_1)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|))) (<= v_main_~n~0_BEFORE_CALL_1 0) (< 0 v_main_~n~0_BEFORE_CALL_1)) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) (+ (* v_main_~n~0_BEFORE_CALL_1 4) (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* v_main_~n~0_BEFORE_CALL_1 4)) |v_main_~#B~0.offset_BEFORE_CALL_1| (* (+ v_main_~n~0_BEFORE_CALL_1 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_1 4) v_main_~n~0_BEFORE_CALL_1)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|)) (<= v_main_~n~0_BEFORE_CALL_1 0) (< 0 v_main_~n~0_BEFORE_CALL_1)))) [2019-10-13 21:38:16,326 INFO L193 IcfgInterpreter]: Reachable states at location L43-2 satisfy 205#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:16,326 INFO L193 IcfgInterpreter]: Reachable states at location L66-2 satisfy 271#(and (<= main_~n~0 0) (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:16,814 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-13 21:38:16,907 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:38:16,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6] total 18 [2019-10-13 21:38:16,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333667740] [2019-10-13 21:38:16,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:38:16,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:38:16,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:38:16,910 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 10 states. [2019-10-13 21:38:17,130 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2019-10-13 21:38:17,349 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2019-10-13 21:38:17,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:17,559 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2019-10-13 21:38:17,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 21:38:17,562 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-10-13 21:38:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:17,564 INFO L225 Difference]: With dead ends: 93 [2019-10-13 21:38:17,564 INFO L226 Difference]: Without dead ends: 68 [2019-10-13 21:38:17,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2019-10-13 21:38:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-13 21:38:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2019-10-13 21:38:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 21:38:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-10-13 21:38:17,590 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 34 [2019-10-13 21:38:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:17,591 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-10-13 21:38:17,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 21:38:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-10-13 21:38:17,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 21:38:17,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:17,595 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:17,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:17,798 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:17,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1540911104, now seen corresponding path program 1 times [2019-10-13 21:38:17,799 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:17,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806782976] [2019-10-13 21:38:17,799 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:17,800 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:17,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:17,808 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:17,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014069535] [2019-10-13 21:38:17,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:17,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:38:17,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 21:38:17,925 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 21:38:17,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806782976] [2019-10-13 21:38:17,962 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:17,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014069535] [2019-10-13 21:38:17,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551817072] [2019-10-13 21:38:17,965 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 21:38:17,965 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:38:17,966 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:38:17,966 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:38:17,966 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:38:18,001 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:38:18,653 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-13 21:38:19,072 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-13 21:38:19,465 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-13 21:38:19,784 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-13 21:38:19,994 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2019-10-13 21:38:20,001 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:38:20,004 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:38:20,004 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:38:20,005 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 200#(or (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= 0 |#NULL.base|) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (<= |main_~#B~0.offset| 0) (not (= 0 |main_~#A~0.base|)) (= main_~n~0 1000) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#valid| (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1)) (= (select |old(#valid)| |main_~#A~0.base|) 0) (<= 0 |main_~#A~0.offset|) (< |main_~#B~0.base| |#StackHeapBarrier|) (<= 0 main_~k~0) (<= |#NULL.base| 0) (= (select (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base|) 0) (not (= |main_~#B~0.base| 0)) (= 0 |main_~#B~0.offset|) (<= 1000 main_~n~0) (= (store (store |old(#length)| |main_~#A~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |main_~#B~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |#length|) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 |main_~#B~0.offset|) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0) (<= main_~n~0 1000)) (not (< main_~j~0 main_~n~0))) [2019-10-13 21:38:20,005 INFO L193 IcfgInterpreter]: Reachable states at location L46-2 satisfy 689#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~k~0) (or (and (<= 0 main_~i~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0)) (and (<= 0 main_~i~0) (<= 1 main_~j~0) (not (< main_~k~0 main_~n~0))))) [2019-10-13 21:38:20,005 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 754#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:38:20,005 INFO L193 IcfgInterpreter]: Reachable states at location L68-2 satisfy 657#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:20,006 INFO L193 IcfgInterpreter]: Reachable states at location L48-2 satisfy 638#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0)) [2019-10-13 21:38:20,006 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 750#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~n~0_BEFORE_CALL_2 Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.base_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) (+ (* v_main_~n~0_BEFORE_CALL_2 4) (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_2 4) v_main_~n~0_BEFORE_CALL_2)) |v_main_~#B~0.offset_BEFORE_CALL_2| (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* v_main_~n~0_BEFORE_CALL_2 4)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|)) (< 0 v_main_~n~0_BEFORE_CALL_2)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) (+ (* v_main_~n~0_BEFORE_CALL_2 4) (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_2 4) v_main_~n~0_BEFORE_CALL_2)) |v_main_~#B~0.offset_BEFORE_CALL_2| (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* v_main_~n~0_BEFORE_CALL_2 4)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|))) (< 0 v_main_~n~0_BEFORE_CALL_2)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:20,006 INFO L193 IcfgInterpreter]: Reachable states at location L27-2 satisfy 195#true [2019-10-13 21:38:20,006 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 740#(and (exists ((v_main_~n~0_BEFORE_CALL_2 Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.base_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) (+ (* v_main_~n~0_BEFORE_CALL_2 4) (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_2 4) v_main_~n~0_BEFORE_CALL_2)) |v_main_~#B~0.offset_BEFORE_CALL_2| (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* v_main_~n~0_BEFORE_CALL_2 4)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|)) (< 0 v_main_~n~0_BEFORE_CALL_2)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) (+ (* v_main_~n~0_BEFORE_CALL_2 4) (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_2 4) v_main_~n~0_BEFORE_CALL_2)) |v_main_~#B~0.offset_BEFORE_CALL_2| (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* v_main_~n~0_BEFORE_CALL_2 4)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|))) (< 0 v_main_~n~0_BEFORE_CALL_2)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:20,007 INFO L193 IcfgInterpreter]: Reachable states at location L69 satisfy 445#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (= (select (select |#memory_int| |main_~#B~0.base|) (+ (* (+ (* main_~j~0 (- 1)) main_~n~0 (- 1)) (* main_~n~0 4)) (* (+ (* main_~i~0 (- 1)) main_~n~0 (- 1)) (* (* main_~n~0 4) main_~n~0)) |main_~#B~0.offset| (* main_~k~0 (- 4)) (* main_~n~0 4) (- 4))) |main_#t~mem3|) (<= main_~i~0 0) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~k~0 4) (* main_~i~0 (* (* main_~n~0 4) main_~n~0)) (* main_~j~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem2|) (< main_~k~0 main_~n~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:20,007 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 21:38:20,007 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 21:38:20,007 INFO L193 IcfgInterpreter]: Reachable states at location L29-2 satisfy 731#(<= 0 main_~k~0) [2019-10-13 21:38:20,007 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 759#(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 21:38:20,008 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:38:20,008 INFO L193 IcfgInterpreter]: Reachable states at location L63-2 satisfy 680#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:20,008 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 745#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~n~0_BEFORE_CALL_2 Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.base_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) (+ (* v_main_~n~0_BEFORE_CALL_2 4) (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_2 4) v_main_~n~0_BEFORE_CALL_2)) |v_main_~#B~0.offset_BEFORE_CALL_2| (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* v_main_~n~0_BEFORE_CALL_2 4)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|)) (< 0 v_main_~n~0_BEFORE_CALL_2)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) (+ (* v_main_~n~0_BEFORE_CALL_2 4) (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_2 4) v_main_~n~0_BEFORE_CALL_2)) |v_main_~#B~0.offset_BEFORE_CALL_2| (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* v_main_~n~0_BEFORE_CALL_2 4)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|))) (< 0 v_main_~n~0_BEFORE_CALL_2)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:20,008 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 735#(exists ((v_main_~n~0_BEFORE_CALL_2 Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.base_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) (+ (* v_main_~n~0_BEFORE_CALL_2 4) (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_2 4) v_main_~n~0_BEFORE_CALL_2)) |v_main_~#B~0.offset_BEFORE_CALL_2| (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* v_main_~n~0_BEFORE_CALL_2 4)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|)) (< 0 v_main_~n~0_BEFORE_CALL_2)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) (+ (* v_main_~n~0_BEFORE_CALL_2 4) (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_2 4) v_main_~n~0_BEFORE_CALL_2)) |v_main_~#B~0.offset_BEFORE_CALL_2| (* (+ v_main_~n~0_BEFORE_CALL_2 (- 1)) (* v_main_~n~0_BEFORE_CALL_2 4)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|))) (< 0 v_main_~n~0_BEFORE_CALL_2)))) [2019-10-13 21:38:20,009 INFO L193 IcfgInterpreter]: Reachable states at location L43-2 satisfy 693#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0)) [2019-10-13 21:38:20,009 INFO L193 IcfgInterpreter]: Reachable states at location L66-2 satisfy 671#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:20,319 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-13 21:38:20,751 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:38:20,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 16] total 25 [2019-10-13 21:38:20,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614515499] [2019-10-13 21:38:20,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 21:38:20,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:20,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 21:38:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2019-10-13 21:38:20,754 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 25 states. [2019-10-13 21:38:21,012 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-10-13 21:38:21,860 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-10-13 21:38:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:22,833 INFO L93 Difference]: Finished difference Result 173 states and 246 transitions. [2019-10-13 21:38:22,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 21:38:22,834 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2019-10-13 21:38:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:22,837 INFO L225 Difference]: With dead ends: 173 [2019-10-13 21:38:22,837 INFO L226 Difference]: Without dead ends: 122 [2019-10-13 21:38:22,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=358, Invalid=1364, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 21:38:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-13 21:38:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2019-10-13 21:38:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 21:38:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2019-10-13 21:38:22,878 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 44 [2019-10-13 21:38:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:22,878 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2019-10-13 21:38:22,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 21:38:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2019-10-13 21:38:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 21:38:22,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:22,881 INFO L380 BasicCegarLoop]: trace histogram [24, 12, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:23,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:23,086 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:23,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1062993536, now seen corresponding path program 2 times [2019-10-13 21:38:23,087 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:23,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866620703] [2019-10-13 21:38:23,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:23,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:23,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:23,110 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:23,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502050954] [2019-10-13 21:38:23,115 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:23,235 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 21:38:23,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:38:23,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:38:23,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-13 21:38:23,286 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-13 21:38:23,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866620703] [2019-10-13 21:38:23,326 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:23,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502050954] [2019-10-13 21:38:23,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282137441] [2019-10-13 21:38:23,330 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 21:38:23,330 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:38:23,331 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:38:23,332 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:38:23,332 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:38:23,353 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:38:23,826 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-13 21:38:24,149 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-13 21:38:24,478 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-13 21:38:24,754 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-13 21:38:24,967 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2019-10-13 21:38:24,973 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:38:24,978 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:38:24,979 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:38:24,979 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 200#(or (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= 0 |#NULL.base|) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (<= |main_~#B~0.offset| 0) (not (= 0 |main_~#A~0.base|)) (= main_~n~0 1000) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#valid| (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1)) (= (select |old(#valid)| |main_~#A~0.base|) 0) (<= 0 |main_~#A~0.offset|) (< |main_~#B~0.base| |#StackHeapBarrier|) (<= 0 main_~k~0) (<= |#NULL.base| 0) (= (select (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base|) 0) (not (= |main_~#B~0.base| 0)) (= 0 |main_~#B~0.offset|) (<= 1000 main_~n~0) (= (store (store |old(#length)| |main_~#A~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |main_~#B~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |#length|) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 |main_~#B~0.offset|) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0) (<= main_~n~0 1000)) (not (< main_~j~0 main_~n~0))) [2019-10-13 21:38:24,979 INFO L193 IcfgInterpreter]: Reachable states at location L46-2 satisfy 689#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~k~0) (or (and (<= 0 main_~i~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0)) (and (<= 0 main_~i~0) (<= 1 main_~j~0) (not (< main_~k~0 main_~n~0))))) [2019-10-13 21:38:24,979 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 754#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:38:24,980 INFO L193 IcfgInterpreter]: Reachable states at location L68-2 satisfy 657#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:24,980 INFO L193 IcfgInterpreter]: Reachable states at location L48-2 satisfy 638#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0)) [2019-10-13 21:38:24,980 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 750#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~n~0_BEFORE_CALL_3 Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (or (and (< 0 v_main_~n~0_BEFORE_CALL_3) (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) (+ (* v_main_~n~0_BEFORE_CALL_3 4) |v_main_~#B~0.offset_BEFORE_CALL_3| (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* v_main_~n~0_BEFORE_CALL_3 4)) (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_3 4) v_main_~n~0_BEFORE_CALL_3)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|))) (and (< 0 v_main_~n~0_BEFORE_CALL_3) (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) (+ (* v_main_~n~0_BEFORE_CALL_3 4) |v_main_~#B~0.offset_BEFORE_CALL_3| (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* v_main_~n~0_BEFORE_CALL_3 4)) (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_3 4) v_main_~n~0_BEFORE_CALL_3)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|)))))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:24,980 INFO L193 IcfgInterpreter]: Reachable states at location L27-2 satisfy 195#true [2019-10-13 21:38:24,980 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 740#(and (exists ((v_main_~n~0_BEFORE_CALL_3 Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (or (and (< 0 v_main_~n~0_BEFORE_CALL_3) (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) (+ (* v_main_~n~0_BEFORE_CALL_3 4) |v_main_~#B~0.offset_BEFORE_CALL_3| (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* v_main_~n~0_BEFORE_CALL_3 4)) (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_3 4) v_main_~n~0_BEFORE_CALL_3)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|))) (and (< 0 v_main_~n~0_BEFORE_CALL_3) (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) (+ (* v_main_~n~0_BEFORE_CALL_3 4) |v_main_~#B~0.offset_BEFORE_CALL_3| (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* v_main_~n~0_BEFORE_CALL_3 4)) (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_3 4) v_main_~n~0_BEFORE_CALL_3)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|)))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:24,981 INFO L193 IcfgInterpreter]: Reachable states at location L69 satisfy 445#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (= (select (select |#memory_int| |main_~#B~0.base|) (+ (* (+ (* main_~j~0 (- 1)) main_~n~0 (- 1)) (* main_~n~0 4)) (* (+ (* main_~i~0 (- 1)) main_~n~0 (- 1)) (* (* main_~n~0 4) main_~n~0)) |main_~#B~0.offset| (* main_~k~0 (- 4)) (* main_~n~0 4) (- 4))) |main_#t~mem3|) (<= main_~i~0 0) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~k~0 4) (* main_~i~0 (* (* main_~n~0 4) main_~n~0)) (* main_~j~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem2|) (< main_~k~0 main_~n~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:24,983 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 21:38:24,983 INFO L193 IcfgInterpreter]: Reachable states at location L29-2 satisfy 731#(<= 0 main_~k~0) [2019-10-13 21:38:24,984 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 21:38:24,984 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 759#(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 21:38:24,984 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:38:24,984 INFO L193 IcfgInterpreter]: Reachable states at location L63-2 satisfy 680#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:24,984 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 745#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~n~0_BEFORE_CALL_3 Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (or (and (< 0 v_main_~n~0_BEFORE_CALL_3) (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) (+ (* v_main_~n~0_BEFORE_CALL_3 4) |v_main_~#B~0.offset_BEFORE_CALL_3| (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* v_main_~n~0_BEFORE_CALL_3 4)) (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_3 4) v_main_~n~0_BEFORE_CALL_3)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|))) (and (< 0 v_main_~n~0_BEFORE_CALL_3) (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) (+ (* v_main_~n~0_BEFORE_CALL_3 4) |v_main_~#B~0.offset_BEFORE_CALL_3| (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* v_main_~n~0_BEFORE_CALL_3 4)) (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_3 4) v_main_~n~0_BEFORE_CALL_3)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|)))))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:24,985 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 735#(exists ((v_main_~n~0_BEFORE_CALL_3 Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (or (and (< 0 v_main_~n~0_BEFORE_CALL_3) (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) (+ (* v_main_~n~0_BEFORE_CALL_3 4) |v_main_~#B~0.offset_BEFORE_CALL_3| (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* v_main_~n~0_BEFORE_CALL_3 4)) (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_3 4) v_main_~n~0_BEFORE_CALL_3)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|))) (and (< 0 v_main_~n~0_BEFORE_CALL_3) (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) (+ (* v_main_~n~0_BEFORE_CALL_3 4) |v_main_~#B~0.offset_BEFORE_CALL_3| (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* v_main_~n~0_BEFORE_CALL_3 4)) (* (+ v_main_~n~0_BEFORE_CALL_3 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_3 4) v_main_~n~0_BEFORE_CALL_3)) (- 4))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|)))))) [2019-10-13 21:38:24,985 INFO L193 IcfgInterpreter]: Reachable states at location L43-2 satisfy 693#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0)) [2019-10-13 21:38:24,985 INFO L193 IcfgInterpreter]: Reachable states at location L66-2 satisfy 671#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:25,306 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-13 21:38:25,671 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:38:25,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 16] total 23 [2019-10-13 21:38:25,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790215497] [2019-10-13 21:38:25,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 21:38:25,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 21:38:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2019-10-13 21:38:25,675 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand 23 states. [2019-10-13 21:38:25,901 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2019-10-13 21:38:26,288 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-10-13 21:38:26,669 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-10-13 21:38:27,020 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2019-10-13 21:38:27,385 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-10-13 21:38:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:28,220 INFO L93 Difference]: Finished difference Result 407 states and 515 transitions. [2019-10-13 21:38:28,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 21:38:28,221 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 68 [2019-10-13 21:38:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:28,225 INFO L225 Difference]: With dead ends: 407 [2019-10-13 21:38:28,225 INFO L226 Difference]: Without dead ends: 332 [2019-10-13 21:38:28,227 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=368, Invalid=1354, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 21:38:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-10-13 21:38:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 207. [2019-10-13 21:38:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-10-13 21:38:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 248 transitions. [2019-10-13 21:38:28,273 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 248 transitions. Word has length 68 [2019-10-13 21:38:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:28,274 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 248 transitions. [2019-10-13 21:38:28,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 21:38:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 248 transitions. [2019-10-13 21:38:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 21:38:28,276 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:28,276 INFO L380 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:28,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:28,481 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash 615518747, now seen corresponding path program 3 times [2019-10-13 21:38:28,482 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:28,483 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60003130] [2019-10-13 21:38:28,483 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:28,483 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:28,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:28,498 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:28,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849819330] [2019-10-13 21:38:28,498 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:28,675 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 21:38:28,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:38:28,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 21:38:28,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 181 proven. 667 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2019-10-13 21:38:28,776 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 181 proven. 667 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2019-10-13 21:38:28,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60003130] [2019-10-13 21:38:28,841 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:28,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849819330] [2019-10-13 21:38:28,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413535896] [2019-10-13 21:38:28,842 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 21:38:28,843 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:38:28,843 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:38:28,843 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:38:28,843 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:38:28,865 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:38:29,343 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-13 21:38:29,615 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-13 21:38:29,897 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-13 21:38:30,203 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-13 21:38:30,386 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2019-10-13 21:38:30,395 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:38:30,402 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:38:30,402 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:38:30,402 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 200#(or (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= 0 |#NULL.base|) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (<= |main_~#B~0.offset| 0) (not (= 0 |main_~#A~0.base|)) (= main_~n~0 1000) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#valid| (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1)) (= (select |old(#valid)| |main_~#A~0.base|) 0) (<= 0 |main_~#A~0.offset|) (< |main_~#B~0.base| |#StackHeapBarrier|) (<= 0 main_~k~0) (<= |#NULL.base| 0) (= (select (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base|) 0) (not (= |main_~#B~0.base| 0)) (= 0 |main_~#B~0.offset|) (<= 1000 main_~n~0) (= (store (store |old(#length)| |main_~#A~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |main_~#B~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |#length|) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 |main_~#B~0.offset|) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0) (<= main_~n~0 1000)) (not (< main_~j~0 main_~n~0))) [2019-10-13 21:38:30,402 INFO L193 IcfgInterpreter]: Reachable states at location L46-2 satisfy 689#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~k~0) (or (and (<= 0 main_~i~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0)) (and (<= 0 main_~i~0) (<= 1 main_~j~0) (not (< main_~k~0 main_~n~0))))) [2019-10-13 21:38:30,403 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 754#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:38:30,403 INFO L193 IcfgInterpreter]: Reachable states at location L68-2 satisfy 657#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:30,403 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 750#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~n~0_BEFORE_CALL_4 Int) (|v_main_~#B~0.base_BEFORE_CALL_4| Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (|v_main_~#B~0.offset_BEFORE_CALL_4| Int) (|v_main_~#A~0.offset_BEFORE_CALL_4| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) (+ (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* v_main_~n~0_BEFORE_CALL_4 4)) (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_4 4) v_main_~n~0_BEFORE_CALL_4)) (* v_main_~n~0_BEFORE_CALL_4 4) |v_main_~#B~0.offset_BEFORE_CALL_4| (- 4)))) (< 0 v_main_~n~0_BEFORE_CALL_4)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) (+ (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* v_main_~n~0_BEFORE_CALL_4 4)) (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_4 4) v_main_~n~0_BEFORE_CALL_4)) (* v_main_~n~0_BEFORE_CALL_4 4) |v_main_~#B~0.offset_BEFORE_CALL_4| (- 4))))) (< 0 v_main_~n~0_BEFORE_CALL_4)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:30,403 INFO L193 IcfgInterpreter]: Reachable states at location L48-2 satisfy 638#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0)) [2019-10-13 21:38:30,404 INFO L193 IcfgInterpreter]: Reachable states at location L27-2 satisfy 195#true [2019-10-13 21:38:30,404 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 740#(and (exists ((v_main_~n~0_BEFORE_CALL_4 Int) (|v_main_~#B~0.base_BEFORE_CALL_4| Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (|v_main_~#B~0.offset_BEFORE_CALL_4| Int) (|v_main_~#A~0.offset_BEFORE_CALL_4| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) (+ (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* v_main_~n~0_BEFORE_CALL_4 4)) (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_4 4) v_main_~n~0_BEFORE_CALL_4)) (* v_main_~n~0_BEFORE_CALL_4 4) |v_main_~#B~0.offset_BEFORE_CALL_4| (- 4)))) (< 0 v_main_~n~0_BEFORE_CALL_4)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) (+ (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* v_main_~n~0_BEFORE_CALL_4 4)) (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_4 4) v_main_~n~0_BEFORE_CALL_4)) (* v_main_~n~0_BEFORE_CALL_4 4) |v_main_~#B~0.offset_BEFORE_CALL_4| (- 4))))) (< 0 v_main_~n~0_BEFORE_CALL_4)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:30,404 INFO L193 IcfgInterpreter]: Reachable states at location L69 satisfy 445#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (= (select (select |#memory_int| |main_~#B~0.base|) (+ (* (+ (* main_~j~0 (- 1)) main_~n~0 (- 1)) (* main_~n~0 4)) (* (+ (* main_~i~0 (- 1)) main_~n~0 (- 1)) (* (* main_~n~0 4) main_~n~0)) |main_~#B~0.offset| (* main_~k~0 (- 4)) (* main_~n~0 4) (- 4))) |main_#t~mem3|) (<= main_~i~0 0) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~k~0 4) (* main_~i~0 (* (* main_~n~0 4) main_~n~0)) (* main_~j~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem2|) (< main_~k~0 main_~n~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:30,404 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 21:38:30,404 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 21:38:30,405 INFO L193 IcfgInterpreter]: Reachable states at location L29-2 satisfy 731#(<= 0 main_~k~0) [2019-10-13 21:38:30,405 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 759#(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 21:38:30,405 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:38:30,405 INFO L193 IcfgInterpreter]: Reachable states at location L63-2 satisfy 680#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:30,405 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 745#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~n~0_BEFORE_CALL_4 Int) (|v_main_~#B~0.base_BEFORE_CALL_4| Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (|v_main_~#B~0.offset_BEFORE_CALL_4| Int) (|v_main_~#A~0.offset_BEFORE_CALL_4| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) (+ (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* v_main_~n~0_BEFORE_CALL_4 4)) (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_4 4) v_main_~n~0_BEFORE_CALL_4)) (* v_main_~n~0_BEFORE_CALL_4 4) |v_main_~#B~0.offset_BEFORE_CALL_4| (- 4)))) (< 0 v_main_~n~0_BEFORE_CALL_4)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) (+ (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* v_main_~n~0_BEFORE_CALL_4 4)) (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_4 4) v_main_~n~0_BEFORE_CALL_4)) (* v_main_~n~0_BEFORE_CALL_4 4) |v_main_~#B~0.offset_BEFORE_CALL_4| (- 4))))) (< 0 v_main_~n~0_BEFORE_CALL_4)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:30,405 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 735#(exists ((v_main_~n~0_BEFORE_CALL_4 Int) (|v_main_~#B~0.base_BEFORE_CALL_4| Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (|v_main_~#B~0.offset_BEFORE_CALL_4| Int) (|v_main_~#A~0.offset_BEFORE_CALL_4| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) (+ (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* v_main_~n~0_BEFORE_CALL_4 4)) (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_4 4) v_main_~n~0_BEFORE_CALL_4)) (* v_main_~n~0_BEFORE_CALL_4 4) |v_main_~#B~0.offset_BEFORE_CALL_4| (- 4)))) (< 0 v_main_~n~0_BEFORE_CALL_4)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) (+ (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* v_main_~n~0_BEFORE_CALL_4 4)) (* (+ v_main_~n~0_BEFORE_CALL_4 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_4 4) v_main_~n~0_BEFORE_CALL_4)) (* v_main_~n~0_BEFORE_CALL_4 4) |v_main_~#B~0.offset_BEFORE_CALL_4| (- 4))))) (< 0 v_main_~n~0_BEFORE_CALL_4)))) [2019-10-13 21:38:30,406 INFO L193 IcfgInterpreter]: Reachable states at location L43-2 satisfy 693#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0)) [2019-10-13 21:38:30,406 INFO L193 IcfgInterpreter]: Reachable states at location L66-2 satisfy 671#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:30,797 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-13 21:38:31,181 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:38:31,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 16] total 27 [2019-10-13 21:38:31,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576386899] [2019-10-13 21:38:31,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 21:38:31,183 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:31,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 21:38:31,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2019-10-13 21:38:31,184 INFO L87 Difference]: Start difference. First operand 207 states and 248 transitions. Second operand 27 states. [2019-10-13 21:38:31,472 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-10-13 21:38:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:33,566 INFO L93 Difference]: Finished difference Result 599 states and 721 transitions. [2019-10-13 21:38:33,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 21:38:33,567 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 158 [2019-10-13 21:38:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:33,571 INFO L225 Difference]: With dead ends: 599 [2019-10-13 21:38:33,571 INFO L226 Difference]: Without dead ends: 382 [2019-10-13 21:38:33,574 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 450 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=464, Invalid=2086, Unknown=0, NotChecked=0, Total=2550 [2019-10-13 21:38:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2019-10-13 21:38:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 303. [2019-10-13 21:38:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2019-10-13 21:38:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 363 transitions. [2019-10-13 21:38:33,624 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 363 transitions. Word has length 158 [2019-10-13 21:38:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:33,624 INFO L462 AbstractCegarLoop]: Abstraction has 303 states and 363 transitions. [2019-10-13 21:38:33,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 21:38:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 363 transitions. [2019-10-13 21:38:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-13 21:38:33,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:33,628 INFO L380 BasicCegarLoop]: trace histogram [72, 66, 12, 12, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:33,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:33,835 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:33,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1496381875, now seen corresponding path program 4 times [2019-10-13 21:38:33,836 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:33,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450793386] [2019-10-13 21:38:33,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:33,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:33,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:33,851 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:33,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716272228] [2019-10-13 21:38:33,851 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:34,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:38:34,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6657 backedges. 558 proven. 21 refuted. 0 times theorem prover too weak. 6078 trivial. 0 not checked. [2019-10-13 21:38:34,232 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6657 backedges. 558 proven. 21 refuted. 0 times theorem prover too weak. 6078 trivial. 0 not checked. [2019-10-13 21:38:34,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450793386] [2019-10-13 21:38:34,337 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:34,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716272228] [2019-10-13 21:38:34,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061593110] [2019-10-13 21:38:34,339 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 21:38:34,339 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:38:34,339 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:38:34,339 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:38:34,340 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:38:34,365 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:38:34,772 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-13 21:38:35,125 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-13 21:38:35,521 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-13 21:38:35,807 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-13 21:38:35,977 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2019-10-13 21:38:35,983 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:38:35,986 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:38:35,986 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:38:35,986 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 200#(or (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= 0 |#NULL.base|) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (<= |main_~#B~0.offset| 0) (not (= 0 |main_~#A~0.base|)) (= main_~n~0 1000) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#valid| (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1)) (= (select |old(#valid)| |main_~#A~0.base|) 0) (<= 0 |main_~#A~0.offset|) (< |main_~#B~0.base| |#StackHeapBarrier|) (<= 0 main_~k~0) (<= |#NULL.base| 0) (= (select (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base|) 0) (not (= |main_~#B~0.base| 0)) (= 0 |main_~#B~0.offset|) (<= 1000 main_~n~0) (= (store (store |old(#length)| |main_~#A~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |main_~#B~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0)) |#length|) (<= main_~i~0 0) (<= |#NULL.offset| 0) (= 0 (select |old(#valid)| 0)) (<= 0 |main_~#B~0.offset|) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0) (<= main_~n~0 1000)) (not (< main_~j~0 main_~n~0))) [2019-10-13 21:38:35,987 INFO L193 IcfgInterpreter]: Reachable states at location L46-2 satisfy 689#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~k~0) (or (and (<= 0 main_~i~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0)) (and (<= 0 main_~i~0) (<= 1 main_~j~0) (not (< main_~k~0 main_~n~0))))) [2019-10-13 21:38:35,987 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 754#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:38:35,987 INFO L193 IcfgInterpreter]: Reachable states at location L68-2 satisfy 657#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:35,987 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 750#(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_main_~n~0_BEFORE_CALL_5 Int) (|v_main_~#B~0.base_BEFORE_CALL_5| Int) (|v_main_~#A~0.base_BEFORE_CALL_5| Int) (|v_main_~#B~0.offset_BEFORE_CALL_5| Int) (|v_main_~#A~0.offset_BEFORE_CALL_5| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (< 0 v_main_~n~0_BEFORE_CALL_5) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) |v_main_~#A~0.offset_BEFORE_CALL_5|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_5|) (+ (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* v_main_~n~0_BEFORE_CALL_5 4)) (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_5 4) v_main_~n~0_BEFORE_CALL_5)) (* v_main_~n~0_BEFORE_CALL_5 4) |v_main_~#B~0.offset_BEFORE_CALL_5| (- 4)))))) (and (= |__VERIFIER_assert_#in~cond| 1) (< 0 v_main_~n~0_BEFORE_CALL_5) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) |v_main_~#A~0.offset_BEFORE_CALL_5|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_5|) (+ (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* v_main_~n~0_BEFORE_CALL_5 4)) (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_5 4) v_main_~n~0_BEFORE_CALL_5)) (* v_main_~n~0_BEFORE_CALL_5 4) |v_main_~#B~0.offset_BEFORE_CALL_5| (- 4))))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:35,987 INFO L193 IcfgInterpreter]: Reachable states at location L48-2 satisfy 638#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0)) [2019-10-13 21:38:35,988 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 740#(and (exists ((v_main_~n~0_BEFORE_CALL_5 Int) (|v_main_~#B~0.base_BEFORE_CALL_5| Int) (|v_main_~#A~0.base_BEFORE_CALL_5| Int) (|v_main_~#B~0.offset_BEFORE_CALL_5| Int) (|v_main_~#A~0.offset_BEFORE_CALL_5| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (< 0 v_main_~n~0_BEFORE_CALL_5) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) |v_main_~#A~0.offset_BEFORE_CALL_5|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_5|) (+ (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* v_main_~n~0_BEFORE_CALL_5 4)) (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_5 4) v_main_~n~0_BEFORE_CALL_5)) (* v_main_~n~0_BEFORE_CALL_5 4) |v_main_~#B~0.offset_BEFORE_CALL_5| (- 4)))))) (and (= |__VERIFIER_assert_#in~cond| 1) (< 0 v_main_~n~0_BEFORE_CALL_5) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) |v_main_~#A~0.offset_BEFORE_CALL_5|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_5|) (+ (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* v_main_~n~0_BEFORE_CALL_5 4)) (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_5 4) v_main_~n~0_BEFORE_CALL_5)) (* v_main_~n~0_BEFORE_CALL_5 4) |v_main_~#B~0.offset_BEFORE_CALL_5| (- 4))))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:35,988 INFO L193 IcfgInterpreter]: Reachable states at location L27-2 satisfy 195#true [2019-10-13 21:38:35,988 INFO L193 IcfgInterpreter]: Reachable states at location L69 satisfy 445#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (= (select (select |#memory_int| |main_~#B~0.base|) (+ (* (+ (* main_~j~0 (- 1)) main_~n~0 (- 1)) (* main_~n~0 4)) (* (+ (* main_~i~0 (- 1)) main_~n~0 (- 1)) (* (* main_~n~0 4) main_~n~0)) |main_~#B~0.offset| (* main_~k~0 (- 4)) (* main_~n~0 4) (- 4))) |main_#t~mem3|) (<= main_~i~0 0) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~k~0 4) (* main_~i~0 (* (* main_~n~0 4) main_~n~0)) (* main_~j~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem2|) (< main_~k~0 main_~n~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:35,988 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 21:38:35,988 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 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 (select |old(#valid)| 0))) [2019-10-13 21:38:35,989 INFO L193 IcfgInterpreter]: Reachable states at location L29-2 satisfy 731#(<= 0 main_~k~0) [2019-10-13 21:38:35,989 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 759#(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 21:38:35,989 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:38:35,989 INFO L193 IcfgInterpreter]: Reachable states at location L63-2 satisfy 680#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:35,989 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 745#(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_main_~n~0_BEFORE_CALL_5 Int) (|v_main_~#B~0.base_BEFORE_CALL_5| Int) (|v_main_~#A~0.base_BEFORE_CALL_5| Int) (|v_main_~#B~0.offset_BEFORE_CALL_5| Int) (|v_main_~#A~0.offset_BEFORE_CALL_5| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (< 0 v_main_~n~0_BEFORE_CALL_5) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) |v_main_~#A~0.offset_BEFORE_CALL_5|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_5|) (+ (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* v_main_~n~0_BEFORE_CALL_5 4)) (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_5 4) v_main_~n~0_BEFORE_CALL_5)) (* v_main_~n~0_BEFORE_CALL_5 4) |v_main_~#B~0.offset_BEFORE_CALL_5| (- 4)))))) (and (= |__VERIFIER_assert_#in~cond| 1) (< 0 v_main_~n~0_BEFORE_CALL_5) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) |v_main_~#A~0.offset_BEFORE_CALL_5|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_5|) (+ (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* v_main_~n~0_BEFORE_CALL_5 4)) (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_5 4) v_main_~n~0_BEFORE_CALL_5)) (* v_main_~n~0_BEFORE_CALL_5 4) |v_main_~#B~0.offset_BEFORE_CALL_5| (- 4))))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:35,989 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 735#(exists ((v_main_~n~0_BEFORE_CALL_5 Int) (|v_main_~#B~0.base_BEFORE_CALL_5| Int) (|v_main_~#A~0.base_BEFORE_CALL_5| Int) (|v_main_~#B~0.offset_BEFORE_CALL_5| Int) (|v_main_~#A~0.offset_BEFORE_CALL_5| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (< 0 v_main_~n~0_BEFORE_CALL_5) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) |v_main_~#A~0.offset_BEFORE_CALL_5|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_5|) (+ (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* v_main_~n~0_BEFORE_CALL_5 4)) (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_5 4) v_main_~n~0_BEFORE_CALL_5)) (* v_main_~n~0_BEFORE_CALL_5 4) |v_main_~#B~0.offset_BEFORE_CALL_5| (- 4)))))) (and (= |__VERIFIER_assert_#in~cond| 1) (< 0 v_main_~n~0_BEFORE_CALL_5) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) |v_main_~#A~0.offset_BEFORE_CALL_5|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_5|) (+ (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* v_main_~n~0_BEFORE_CALL_5 4)) (* (+ v_main_~n~0_BEFORE_CALL_5 (- 1)) (* (* v_main_~n~0_BEFORE_CALL_5 4) v_main_~n~0_BEFORE_CALL_5)) (* v_main_~n~0_BEFORE_CALL_5 4) |v_main_~#B~0.offset_BEFORE_CALL_5| (- 4))))))) [2019-10-13 21:38:35,990 INFO L193 IcfgInterpreter]: Reachable states at location L43-2 satisfy 693#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~k~0)) [2019-10-13 21:38:35,990 INFO L193 IcfgInterpreter]: Reachable states at location L66-2 satisfy 671#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~i~0) (<= 0 main_~k~0) (< main_~i~0 main_~n~0) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:38:36,292 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-13 21:38:36,646 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:38:36,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 16] total 33 [2019-10-13 21:38:36,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259380308] [2019-10-13 21:38:36,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 21:38:36,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:36,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 21:38:36,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 21:38:36,650 INFO L87 Difference]: Start difference. First operand 303 states and 363 transitions. Second operand 33 states. [2019-10-13 21:38:36,890 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-10-13 21:38:38,171 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-10-13 21:38:39,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:39,515 INFO L93 Difference]: Finished difference Result 860 states and 1218 transitions. [2019-10-13 21:38:39,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 21:38:39,516 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 214 [2019-10-13 21:38:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:39,520 INFO L225 Difference]: With dead ends: 860 [2019-10-13 21:38:39,520 INFO L226 Difference]: Without dead ends: 571 [2019-10-13 21:38:39,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 613 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=754, Invalid=2552, Unknown=0, NotChecked=0, Total=3306 [2019-10-13 21:38:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2019-10-13 21:38:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 567. [2019-10-13 21:38:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2019-10-13 21:38:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 651 transitions. [2019-10-13 21:38:39,582 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 651 transitions. Word has length 214 [2019-10-13 21:38:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:39,582 INFO L462 AbstractCegarLoop]: Abstraction has 567 states and 651 transitions. [2019-10-13 21:38:39,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 21:38:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 651 transitions. [2019-10-13 21:38:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2019-10-13 21:38:39,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:39,590 INFO L380 BasicCegarLoop]: trace histogram [168, 154, 12, 12, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:39,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:39,795 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:39,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:39,796 INFO L82 PathProgramCache]: Analyzing trace with hash -870746675, now seen corresponding path program 5 times [2019-10-13 21:38:39,796 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:39,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842681139] [2019-10-13 21:38:39,797 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:39,797 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:39,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:39,827 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:39,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355254260] [2019-10-13 21:38:39,828 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true