java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:36:14,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:36:14,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:36:14,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:36:14,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:36:14,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:36:14,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:36:14,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:36:14,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:36:14,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:36:14,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:36:14,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:36:14,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:36:14,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:36:14,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:36:14,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:36:14,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:36:14,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:36:14,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:36:14,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:36:14,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:36:14,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:36:14,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:36:14,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:36:14,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:36:14,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:36:14,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:36:14,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:36:14,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:36:14,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:36:14,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:36:14,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:36:14,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:36:14,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:36:14,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:36:14,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:36:14,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:36:14,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:36:14,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:36:14,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:36:14,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:36:14,410 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 21:36:14,425 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:36:14,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:36:14,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:36:14,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:36:14,427 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:36:14,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:36:14,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:36:14,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:36:14,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:36:14,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:36:14,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:36:14,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:36:14,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:36:14,428 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:36:14,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:36:14,429 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:36:14,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:36:14,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:36:14,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:36:14,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:36:14,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:36:14,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:36:14,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:36:14,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:36:14,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:36:14,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:36:14,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:36:14,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:36:14,432 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 21:36:14,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:36:14,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:36:14,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:36:14,738 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:36:14,738 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:36:14,739 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i [2019-10-13 21:36:14,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b7a65ae0/ccf0abe548584a9aa19a2d31bb855917/FLAGd95cfa5b5 [2019-10-13 21:36:15,274 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:36:15,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_01.i [2019-10-13 21:36:15,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b7a65ae0/ccf0abe548584a9aa19a2d31bb855917/FLAGd95cfa5b5 [2019-10-13 21:36:15,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b7a65ae0/ccf0abe548584a9aa19a2d31bb855917 [2019-10-13 21:36:15,698 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:36:15,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:36:15,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:36:15,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:36:15,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:36:15,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:36:15" (1/1) ... [2019-10-13 21:36:15,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1729396c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15, skipping insertion in model container [2019-10-13 21:36:15,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:36:15" (1/1) ... [2019-10-13 21:36:15,717 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:36:15,736 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:36:15,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:36:15,946 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:36:15,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:36:15,990 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:36:15,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15 WrapperNode [2019-10-13 21:36:15,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:36:15,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:36:15,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:36:15,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:36:16,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15" (1/1) ... [2019-10-13 21:36:16,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15" (1/1) ... [2019-10-13 21:36:16,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15" (1/1) ... [2019-10-13 21:36:16,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15" (1/1) ... [2019-10-13 21:36:16,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15" (1/1) ... [2019-10-13 21:36:16,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15" (1/1) ... [2019-10-13 21:36:16,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15" (1/1) ... [2019-10-13 21:36:16,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:36:16,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:36:16,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:36:16,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:36:16,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15" (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 21:36:16,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:36:16,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:36:16,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:36:16,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:36:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:36:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:36:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:36:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:36:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:36:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:36:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:36:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:36:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:36:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:36:16,548 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:36:16,549 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 21:36:16,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:36:16 BoogieIcfgContainer [2019-10-13 21:36:16,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:36:16,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:36:16,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:36:16,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:36:16,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:36:15" (1/3) ... [2019-10-13 21:36:16,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5421fece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:36:16, skipping insertion in model container [2019-10-13 21:36:16,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:15" (2/3) ... [2019-10-13 21:36:16,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5421fece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:36:16, skipping insertion in model container [2019-10-13 21:36:16,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:36:16" (3/3) ... [2019-10-13 21:36:16,558 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2019-10-13 21:36:16,568 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:36:16,575 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:36:16,586 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:36:16,607 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:36:16,607 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:36:16,608 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:36:16,608 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:36:16,608 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:36:16,608 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:36:16,608 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:36:16,608 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:36:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-13 21:36:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 21:36:16,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:16,633 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:16,635 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-10-13 21:36:16,647 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:16,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902737464] [2019-10-13 21:36:16,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:16,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:16,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:16,825 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 21:36:16,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902737464] [2019-10-13 21:36:16,827 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:36:16,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:36:16,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692997405] [2019-10-13 21:36:16,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:36:16,833 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:36:16,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:36:16,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:36:16,852 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-13 21:36:16,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:36:16,909 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-10-13 21:36:16,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:36:16,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-13 21:36:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:36:16,921 INFO L225 Difference]: With dead ends: 37 [2019-10-13 21:36:16,921 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 21:36:16,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:36:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 21:36:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-13 21:36:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-13 21:36:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-13 21:36:16,962 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-10-13 21:36:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:36:16,962 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-13 21:36:16,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:36:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-13 21:36:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 21:36:16,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:16,964 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:16,964 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-10-13 21:36:16,965 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:16,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075415585] [2019-10-13 21:36:16,966 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:16,966 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:16,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:36:17,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075415585] [2019-10-13 21:36:17,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981287462] [2019-10-13 21:36:17,073 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 21:36:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:17,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:36:17,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:36:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:36:17,174 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:36:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:36:17,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [438901769] [2019-10-13 21:36:17,238 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:36:17,239 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:36:17,245 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:36:17,253 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:36:17,254 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:36:17,445 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:36:17,939 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2019-10-13 21:36:18,053 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-13 21:36:18,073 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:36:18,085 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:36:18,085 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:36:18,085 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 131#(and (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (v_prenex_4 Int) (v_prenex_2 Int) (v_prenex_3 Int) (|v_main_~#b~0.offset_BEFORE_CALL_1| Int) (|v_main_~#a~0.offset_BEFORE_CALL_1| Int) (v_prenex_1 Int) (|v_main_~#a~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_~#b~0.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) |v_main_~#a~0.offset_BEFORE_CALL_1|)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_1) v_prenex_2) (select (select |#memory_int| v_prenex_4) v_prenex_3))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:18,086 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 116#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (= main_~j~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:36:18,086 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 136#(and (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (v_prenex_4 Int) (v_prenex_2 Int) (v_prenex_3 Int) (|v_main_~#b~0.offset_BEFORE_CALL_1| Int) (|v_main_~#a~0.offset_BEFORE_CALL_1| Int) (v_prenex_1 Int) (|v_main_~#a~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_~#b~0.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) |v_main_~#a~0.offset_BEFORE_CALL_1|)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_1) v_prenex_2) (select (select |#memory_int| v_prenex_4) v_prenex_3))))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:18,086 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 141#(and (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (v_prenex_4 Int) (v_prenex_2 Int) (v_prenex_3 Int) (|v_main_~#b~0.offset_BEFORE_CALL_1| Int) (|v_main_~#a~0.offset_BEFORE_CALL_1| Int) (v_prenex_1 Int) (|v_main_~#a~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_~#b~0.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) |v_main_~#a~0.offset_BEFORE_CALL_1|)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_1) v_prenex_2) (select (select |#memory_int| v_prenex_4) v_prenex_3))))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:18,087 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 145#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:36:18,087 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 111#(<= 0 main_~i~0) [2019-10-13 21:36:18,088 INFO L193 IcfgInterpreter]: Reachable states at location L26 satisfy 121#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (= |main_#t~mem2| (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~j~0 4) |main_~#a~0.offset|))) (= (select (select |#memory_int| |main_~#b~0.base|) (+ (* main_~j~0 4) |main_~#b~0.offset|)) |main_#t~mem3|) (= main_~j~0 0) (< main_~i~0 10000) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:36:18,089 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 21:36:18,090 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 21:36:18,091 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 150#(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 21:36:18,091 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:36:18,092 INFO L193 IcfgInterpreter]: Reachable states at location L10-2 satisfy 68#true [2019-10-13 21:36:18,093 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 126#(exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (v_prenex_4 Int) (v_prenex_2 Int) (v_prenex_3 Int) (|v_main_~#b~0.offset_BEFORE_CALL_1| Int) (|v_main_~#a~0.offset_BEFORE_CALL_1| Int) (v_prenex_1 Int) (|v_main_~#a~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_~#b~0.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) |v_main_~#a~0.offset_BEFORE_CALL_1|)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_1) v_prenex_2) (select (select |#memory_int| v_prenex_4) v_prenex_3))))) [2019-10-13 21:36:18,396 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:36:18,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-13 21:36:18,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763920065] [2019-10-13 21:36:18,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 21:36:18,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:36:18,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 21:36:18,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:36:18,403 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 17 states. [2019-10-13 21:36:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:36:19,046 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-10-13 21:36:19,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 21:36:19,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-13 21:36:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:36:19,049 INFO L225 Difference]: With dead ends: 51 [2019-10-13 21:36:19,049 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 21:36:19,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2019-10-13 21:36:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 21:36:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2019-10-13 21:36:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 21:36:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-13 21:36:19,073 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-13 21:36:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:36:19,074 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-13 21:36:19,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 21:36:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-13 21:36:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 21:36:19,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:19,075 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:19,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:19,276 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash 946085148, now seen corresponding path program 2 times [2019-10-13 21:36:19,277 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:19,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988361430] [2019-10-13 21:36:19,277 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:19,277 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:19,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:36:19,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988361430] [2019-10-13 21:36:19,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51922707] [2019-10-13 21:36:19,394 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:19,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 21:36:19,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:36:19,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:36:19,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:36:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:36:19,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:36:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:36:19,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566995192] [2019-10-13 21:36:19,542 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:36:19,542 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:36:19,543 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:36:19,543 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:36:19,543 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:36:19,586 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:36:19,947 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-13 21:36:19,970 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:36:19,978 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:36:19,978 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:36:19,978 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 131#(and (exists ((v_prenex_6 Int) (v_prenex_7 Int) (|v_main_~#a~0.base_BEFORE_CALL_2| Int) (v_prenex_5 Int) (|v_main_~#b~0.base_BEFORE_CALL_2| Int) (|v_main_~#a~0.offset_BEFORE_CALL_2| Int) (|v_main_~#b~0.offset_BEFORE_CALL_2| Int) (v_prenex_8 Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| v_prenex_5) v_prenex_7) (select (select |#memory_int| v_prenex_6) v_prenex_8)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) |v_main_~#a~0.offset_BEFORE_CALL_2|) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_2|) |v_main_~#b~0.offset_BEFORE_CALL_2|))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:19,979 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 116#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (= main_~j~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:36:19,979 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 136#(and (exists ((v_prenex_6 Int) (v_prenex_7 Int) (|v_main_~#a~0.base_BEFORE_CALL_2| Int) (v_prenex_5 Int) (|v_main_~#b~0.base_BEFORE_CALL_2| Int) (|v_main_~#a~0.offset_BEFORE_CALL_2| Int) (|v_main_~#b~0.offset_BEFORE_CALL_2| Int) (v_prenex_8 Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| v_prenex_5) v_prenex_7) (select (select |#memory_int| v_prenex_6) v_prenex_8)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) |v_main_~#a~0.offset_BEFORE_CALL_2|) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_2|) |v_main_~#b~0.offset_BEFORE_CALL_2|))))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:19,980 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 141#(and (exists ((v_prenex_6 Int) (v_prenex_7 Int) (|v_main_~#a~0.base_BEFORE_CALL_2| Int) (v_prenex_5 Int) (|v_main_~#b~0.base_BEFORE_CALL_2| Int) (|v_main_~#a~0.offset_BEFORE_CALL_2| Int) (|v_main_~#b~0.offset_BEFORE_CALL_2| Int) (v_prenex_8 Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| v_prenex_5) v_prenex_7) (select (select |#memory_int| v_prenex_6) v_prenex_8)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) |v_main_~#a~0.offset_BEFORE_CALL_2|) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_2|) |v_main_~#b~0.offset_BEFORE_CALL_2|))))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:19,980 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 145#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:36:19,981 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 111#(<= 0 main_~i~0) [2019-10-13 21:36:19,982 INFO L193 IcfgInterpreter]: Reachable states at location L26 satisfy 121#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (= |main_#t~mem2| (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~j~0 4) |main_~#a~0.offset|))) (= (select (select |#memory_int| |main_~#b~0.base|) (+ (* main_~j~0 4) |main_~#b~0.offset|)) |main_#t~mem3|) (= main_~j~0 0) (< main_~i~0 10000) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:36:19,982 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 21:36:19,982 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 21:36:19,983 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 150#(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 21:36:19,983 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:36:19,984 INFO L193 IcfgInterpreter]: Reachable states at location L10-2 satisfy 68#true [2019-10-13 21:36:19,984 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 126#(exists ((v_prenex_6 Int) (v_prenex_7 Int) (|v_main_~#a~0.base_BEFORE_CALL_2| Int) (v_prenex_5 Int) (|v_main_~#b~0.base_BEFORE_CALL_2| Int) (|v_main_~#a~0.offset_BEFORE_CALL_2| Int) (|v_main_~#b~0.offset_BEFORE_CALL_2| Int) (v_prenex_8 Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| v_prenex_5) v_prenex_7) (select (select |#memory_int| v_prenex_6) v_prenex_8)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) |v_main_~#a~0.offset_BEFORE_CALL_2|) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_2|) |v_main_~#b~0.offset_BEFORE_CALL_2|))))) [2019-10-13 21:36:20,290 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:36:20,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-13 21:36:20,291 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105854055] [2019-10-13 21:36:20,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 21:36:20,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:36:20,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 21:36:20,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2019-10-13 21:36:20,294 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 23 states. [2019-10-13 21:36:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:36:21,221 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2019-10-13 21:36:21,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 21:36:21,221 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-10-13 21:36:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:36:21,223 INFO L225 Difference]: With dead ends: 84 [2019-10-13 21:36:21,223 INFO L226 Difference]: Without dead ends: 70 [2019-10-13 21:36:21,224 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 21:36:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-13 21:36:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 36. [2019-10-13 21:36:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 21:36:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-13 21:36:21,236 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2019-10-13 21:36:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:36:21,237 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-13 21:36:21,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 21:36:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-13 21:36:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 21:36:21,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:21,238 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:21,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:21,443 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:21,444 INFO L82 PathProgramCache]: Analyzing trace with hash 645148924, now seen corresponding path program 3 times [2019-10-13 21:36:21,444 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:21,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832628231] [2019-10-13 21:36:21,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:21,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:21,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 21:36:21,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832628231] [2019-10-13 21:36:21,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878076330] [2019-10-13 21:36:21,639 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:21,710 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 21:36:21,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:36:21,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:36:21,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:36:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 21:36:21,730 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:36:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 21:36:21,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501737183] [2019-10-13 21:36:21,965 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:36:21,966 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:36:21,966 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:36:21,967 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:36:21,967 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:36:22,004 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:36:22,234 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-10-13 21:36:22,343 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-13 21:36:22,359 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:36:22,396 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:36:22,397 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:36:22,397 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 131#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (v_prenex_12 Int) (|v_main_~#a~0.offset_BEFORE_CALL_3| Int) (|v_main_~#b~0.offset_BEFORE_CALL_3| Int) (v_prenex_11 Int) (v_prenex_10 Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int) (v_prenex_9 Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) |v_main_~#a~0.offset_BEFORE_CALL_3|) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|) |v_main_~#b~0.offset_BEFORE_CALL_3|)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_9) v_prenex_10) (select (select |#memory_int| v_prenex_12) v_prenex_11))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:22,397 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 116#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (= main_~j~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:36:22,398 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 136#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (v_prenex_12 Int) (|v_main_~#a~0.offset_BEFORE_CALL_3| Int) (|v_main_~#b~0.offset_BEFORE_CALL_3| Int) (v_prenex_11 Int) (v_prenex_10 Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int) (v_prenex_9 Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) |v_main_~#a~0.offset_BEFORE_CALL_3|) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|) |v_main_~#b~0.offset_BEFORE_CALL_3|)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_9) v_prenex_10) (select (select |#memory_int| v_prenex_12) v_prenex_11))))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:22,398 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 141#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (v_prenex_12 Int) (|v_main_~#a~0.offset_BEFORE_CALL_3| Int) (|v_main_~#b~0.offset_BEFORE_CALL_3| Int) (v_prenex_11 Int) (v_prenex_10 Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int) (v_prenex_9 Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) |v_main_~#a~0.offset_BEFORE_CALL_3|) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|) |v_main_~#b~0.offset_BEFORE_CALL_3|)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_9) v_prenex_10) (select (select |#memory_int| v_prenex_12) v_prenex_11))))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:22,398 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 145#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:36:22,399 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 111#(<= 0 main_~i~0) [2019-10-13 21:36:22,399 INFO L193 IcfgInterpreter]: Reachable states at location L26 satisfy 121#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (= |main_#t~mem2| (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~j~0 4) |main_~#a~0.offset|))) (= (select (select |#memory_int| |main_~#b~0.base|) (+ (* main_~j~0 4) |main_~#b~0.offset|)) |main_#t~mem3|) (= main_~j~0 0) (< main_~i~0 10000) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:36:22,400 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 21:36:22,401 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 21:36:22,401 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 150#(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 21:36:22,402 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:36:22,403 INFO L193 IcfgInterpreter]: Reachable states at location L10-2 satisfy 68#true [2019-10-13 21:36:22,404 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 126#(exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (v_prenex_12 Int) (|v_main_~#a~0.offset_BEFORE_CALL_3| Int) (|v_main_~#b~0.offset_BEFORE_CALL_3| Int) (v_prenex_11 Int) (v_prenex_10 Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int) (v_prenex_9 Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) |v_main_~#a~0.offset_BEFORE_CALL_3|) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|) |v_main_~#b~0.offset_BEFORE_CALL_3|)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_9) v_prenex_10) (select (select |#memory_int| v_prenex_12) v_prenex_11))))) [2019-10-13 21:36:22,719 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:36:22,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-13 21:36:22,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548571909] [2019-10-13 21:36:22,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 21:36:22,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:36:22,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 21:36:22,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=814, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 21:36:22,724 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 35 states. [2019-10-13 21:36:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:36:24,846 INFO L93 Difference]: Finished difference Result 150 states and 197 transitions. [2019-10-13 21:36:24,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 21:36:24,847 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2019-10-13 21:36:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:36:24,849 INFO L225 Difference]: With dead ends: 150 [2019-10-13 21:36:24,849 INFO L226 Difference]: Without dead ends: 130 [2019-10-13 21:36:24,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2019-10-13 21:36:24,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-13 21:36:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 60. [2019-10-13 21:36:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-13 21:36:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-10-13 21:36:24,874 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2019-10-13 21:36:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:36:24,874 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-10-13 21:36:24,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 21:36:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-10-13 21:36:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 21:36:24,876 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:24,876 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:25,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:25,080 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:25,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:25,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1203167420, now seen corresponding path program 4 times [2019-10-13 21:36:25,082 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:25,082 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969546951] [2019-10-13 21:36:25,082 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:25,083 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:25,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-13 21:36:25,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969546951] [2019-10-13 21:36:25,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805460824] [2019-10-13 21:36:25,526 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:25,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 21:36:25,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:36:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-13 21:36:25,657 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:36:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-13 21:36:26,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52002594] [2019-10-13 21:36:26,376 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:36:26,376 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:36:26,376 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:36:26,376 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:36:26,377 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:36:26,414 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:36:26,653 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-13 21:36:26,662 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:36:26,666 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:36:26,666 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:36:26,667 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 131#(and (exists ((v_prenex_16 Int) (|v_main_~#a~0.base_BEFORE_CALL_4| Int) (v_prenex_15 Int) (|v_main_~#a~0.offset_BEFORE_CALL_4| Int) (|v_main_~#b~0.offset_BEFORE_CALL_4| Int) (v_prenex_14 Int) (v_prenex_13 Int) (|v_main_~#b~0.base_BEFORE_CALL_4| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_16) v_prenex_15) (select (select |#memory_int| v_prenex_13) v_prenex_14))) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_4|) |v_main_~#b~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) |v_main_~#a~0.offset_BEFORE_CALL_4|)))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:26,667 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 116#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (= main_~j~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:36:26,667 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 136#(and (exists ((v_prenex_16 Int) (|v_main_~#a~0.base_BEFORE_CALL_4| Int) (v_prenex_15 Int) (|v_main_~#a~0.offset_BEFORE_CALL_4| Int) (|v_main_~#b~0.offset_BEFORE_CALL_4| Int) (v_prenex_14 Int) (v_prenex_13 Int) (|v_main_~#b~0.base_BEFORE_CALL_4| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_16) v_prenex_15) (select (select |#memory_int| v_prenex_13) v_prenex_14))) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_4|) |v_main_~#b~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) |v_main_~#a~0.offset_BEFORE_CALL_4|)))))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:26,667 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 141#(and (exists ((v_prenex_16 Int) (|v_main_~#a~0.base_BEFORE_CALL_4| Int) (v_prenex_15 Int) (|v_main_~#a~0.offset_BEFORE_CALL_4| Int) (|v_main_~#b~0.offset_BEFORE_CALL_4| Int) (v_prenex_14 Int) (v_prenex_13 Int) (|v_main_~#b~0.base_BEFORE_CALL_4| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_16) v_prenex_15) (select (select |#memory_int| v_prenex_13) v_prenex_14))) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_4|) |v_main_~#b~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) |v_main_~#a~0.offset_BEFORE_CALL_4|)))))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:26,668 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 145#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:36:26,668 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 111#(<= 0 main_~i~0) [2019-10-13 21:36:26,668 INFO L193 IcfgInterpreter]: Reachable states at location L26 satisfy 121#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (= |main_#t~mem2| (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~j~0 4) |main_~#a~0.offset|))) (= (select (select |#memory_int| |main_~#b~0.base|) (+ (* main_~j~0 4) |main_~#b~0.offset|)) |main_#t~mem3|) (= main_~j~0 0) (< main_~i~0 10000) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:36:26,668 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 21:36:26,668 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 21:36:26,670 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 150#(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 21:36:26,670 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:36:26,670 INFO L193 IcfgInterpreter]: Reachable states at location L10-2 satisfy 68#true [2019-10-13 21:36:26,670 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 126#(exists ((v_prenex_16 Int) (|v_main_~#a~0.base_BEFORE_CALL_4| Int) (v_prenex_15 Int) (|v_main_~#a~0.offset_BEFORE_CALL_4| Int) (|v_main_~#b~0.offset_BEFORE_CALL_4| Int) (v_prenex_14 Int) (v_prenex_13 Int) (|v_main_~#b~0.base_BEFORE_CALL_4| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (= (select (select |#memory_int| v_prenex_16) v_prenex_15) (select (select |#memory_int| v_prenex_13) v_prenex_14))) (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_4|) |v_main_~#b~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) |v_main_~#a~0.offset_BEFORE_CALL_4|)))))) [2019-10-13 21:36:27,010 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:36:27,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-13 21:36:27,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270374229] [2019-10-13 21:36:27,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-13 21:36:27,013 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:36:27,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-13 21:36:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1300, Invalid=2122, Unknown=0, NotChecked=0, Total=3422 [2019-10-13 21:36:27,015 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 59 states. [2019-10-13 21:36:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:36:31,546 INFO L93 Difference]: Finished difference Result 282 states and 377 transitions. [2019-10-13 21:36:31,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-13 21:36:31,546 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 56 [2019-10-13 21:36:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:36:31,550 INFO L225 Difference]: With dead ends: 282 [2019-10-13 21:36:31,550 INFO L226 Difference]: Without dead ends: 250 [2019-10-13 21:36:31,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3887, Invalid=8545, Unknown=0, NotChecked=0, Total=12432 [2019-10-13 21:36:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-10-13 21:36:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 108. [2019-10-13 21:36:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-13 21:36:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-10-13 21:36:31,592 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2019-10-13 21:36:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:36:31,593 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-10-13 21:36:31,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-13 21:36:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-10-13 21:36:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-13 21:36:31,596 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:31,597 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:31,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:31,805 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:31,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1467064260, now seen corresponding path program 5 times [2019-10-13 21:36:31,806 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:31,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373012295] [2019-10-13 21:36:31,807 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:31,807 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:31,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-13 21:36:33,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373012295] [2019-10-13 21:36:33,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908845236] [2019-10-13 21:36:33,001 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true