java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:01:21,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:01:21,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:01:21,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:01:21,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:01:21,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:01:21,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:01:21,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:01:21,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:01:21,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:01:21,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:01:21,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:01:21,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:01:21,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:01:21,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:01:21,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:01:21,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:01:21,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:01:21,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:01:21,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:01:21,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:01:21,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:01:21,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:01:21,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:01:21,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:01:21,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:01:21,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:01:21,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:01:21,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:01:21,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:01:21,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:01:21,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:01:21,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:01:21,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:01:21,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:01:21,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:01:21,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:01:21,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:01:21,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:01:21,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:01:21,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:01:21,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:01:21,499 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:01:21,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:01:21,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:01:21,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:01:21,504 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:01:21,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:01:21,504 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:01:21,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:01:21,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:01:21,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:01:21,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:01:21,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:01:21,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:01:21,507 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:01:21,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:01:21,507 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:01:21,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:01:21,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:01:21,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:01:21,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:01:21,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:01:21,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:01:21,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:01:21,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:01:21,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:01:21,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:01:21,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:01:21,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:01:21,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:01:21,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:01:21,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:01:21,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:01:21,875 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:01:21,876 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:01:21,876 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2019-10-15 03:01:21,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e01a8733/7fc339c63d394bcfafa4e686857f07a5/FLAG1f8ba2591 [2019-10-15 03:01:22,472 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:01:22,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2019-10-15 03:01:22,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e01a8733/7fc339c63d394bcfafa4e686857f07a5/FLAG1f8ba2591 [2019-10-15 03:01:22,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e01a8733/7fc339c63d394bcfafa4e686857f07a5 [2019-10-15 03:01:22,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:01:22,904 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:01:22,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:22,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:01:22,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:01:22,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:22" (1/1) ... [2019-10-15 03:01:22,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a7327f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:22, skipping insertion in model container [2019-10-15 03:01:22,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:22" (1/1) ... [2019-10-15 03:01:22,923 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:01:22,946 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:01:23,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:23,154 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:01:23,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:23,212 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:01:23,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23 WrapperNode [2019-10-15 03:01:23,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:23,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:01:23,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:01:23,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:01:23,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:01:23,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:01:23,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:01:23,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:01:23,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:01:23,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:01:23,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:01:23,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:01:23,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:01:23,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:01:23,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:01:23,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:01:23,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 03:01:23,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:01:23,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:01:23,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:01:23,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:01:23,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:01:23,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:01:23,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:01:23,792 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:01:23,793 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 03:01:23,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:23 BoogieIcfgContainer [2019-10-15 03:01:23,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:01:23,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:01:23,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:01:23,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:01:23,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:01:22" (1/3) ... [2019-10-15 03:01:23,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98733d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:23, skipping insertion in model container [2019-10-15 03:01:23,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (2/3) ... [2019-10-15 03:01:23,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98733d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:23, skipping insertion in model container [2019-10-15 03:01:23,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:23" (3/3) ... [2019-10-15 03:01:23,803 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2019-10-15 03:01:23,813 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:01:23,821 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:01:23,834 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:01:23,861 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:01:23,861 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:01:23,861 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:01:23,861 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:01:23,862 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:01:23,862 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:01:23,862 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:01:23,862 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:01:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-15 03:01:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:01:23,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:23,888 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:23,891 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2145607436, now seen corresponding path program 1 times [2019-10-15 03:01:23,907 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:23,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312942313] [2019-10-15 03:01:23,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:23,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:23,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:24,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312942313] [2019-10-15 03:01:24,084 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:01:24,085 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:01:24,085 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135104581] [2019-10-15 03:01:24,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:01:24,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:24,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:01:24,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:01:24,103 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-10-15 03:01:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:24,180 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-10-15 03:01:24,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:01:24,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 03:01:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:24,193 INFO L225 Difference]: With dead ends: 34 [2019-10-15 03:01:24,193 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 03:01:24,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:01:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 03:01:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2019-10-15 03:01:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 03:01:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 03:01:24,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-10-15 03:01:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:24,242 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 03:01:24,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:01:24,242 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 03:01:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:01:24,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:24,243 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:24,243 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:24,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1122509676, now seen corresponding path program 1 times [2019-10-15 03:01:24,244 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:24,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283591308] [2019-10-15 03:01:24,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:24,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:24,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:24,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283591308] [2019-10-15 03:01:24,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832106824] [2019-10-15 03:01:24,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:24,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 03:01:24,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:24,505 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-15 03:01:24,506 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 03:01:24,514 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 03:01:24,516 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 03:01:24,516 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2019-10-15 03:01:24,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,557 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 03:01:24,559 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 03:01:24,561 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2019-10-15 03:01:24,562 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 03:01:24,572 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:24,572 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 03:01:24,607 INFO L567 ElimStorePlain]: treesize reduction 10, result has 47.4 percent of original size [2019-10-15 03:01:24,608 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 03:01:24,608 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:9 [2019-10-15 03:01:24,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:24,649 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:24,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,768 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2019-10-15 03:01:24,798 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2019-10-15 03:01:24,802 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-10-15 03:01:24,840 INFO L567 ElimStorePlain]: treesize reduction 12, result has 66.7 percent of original size [2019-10-15 03:01:24,841 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 03:01:24,896 INFO L567 ElimStorePlain]: treesize reduction 46, result has 34.3 percent of original size [2019-10-15 03:01:24,897 INFO L464 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2019-10-15 03:01:24,899 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-15 03:01:24,900 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:79, output treesize:24 [2019-10-15 03:01:26,083 WARN L191 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 14 [2019-10-15 03:01:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:26,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926957568] [2019-10-15 03:01:26,142 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:01:26,142 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:26,148 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:26,156 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:26,156 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:26,290 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:26,486 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:26,513 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2019-10-15 03:01:26,528 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:26,535 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:26,947 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:26,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8, 10] total 22 [2019-10-15 03:01:26,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289970551] [2019-10-15 03:01:26,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:01:26,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:26,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:01:26,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:01:26,956 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 22 states. [2019-10-15 03:01:27,558 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2019-10-15 03:01:27,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:27,874 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-10-15 03:01:27,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 03:01:27,874 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 12 [2019-10-15 03:01:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:27,875 INFO L225 Difference]: With dead ends: 36 [2019-10-15 03:01:27,875 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 03:01:27,877 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2019-10-15 03:01:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 03:01:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-10-15 03:01:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 03:01:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-15 03:01:27,885 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2019-10-15 03:01:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:27,885 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-15 03:01:27,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:01:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-15 03:01:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 03:01:27,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:27,887 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:28,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:28,090 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:28,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2118559936, now seen corresponding path program 1 times [2019-10-15 03:01:28,091 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:28,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593645115] [2019-10-15 03:01:28,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:28,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:28,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:01:28,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593645115] [2019-10-15 03:01:28,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114356836] [2019-10-15 03:01:28,199 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 [2019-10-15 03:01:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:28,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:01:28,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:28,289 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:28,458 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:28,560 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:28,704 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-15 03:01:29,128 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-10-15 03:01:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:29,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510419774] [2019-10-15 03:01:29,244 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 03:01:29,244 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:29,244 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:29,245 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:29,245 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:29,295 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:29,452 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:29,456 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:29,538 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:29,768 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2019-10-15 03:01:29,843 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:29,850 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:32,644 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2019-10-15 03:01:32,889 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-10-15 03:01:33,093 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:33,093 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 10, 11] total 31 [2019-10-15 03:01:33,094 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564490059] [2019-10-15 03:01:33,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-15 03:01:33,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-15 03:01:33,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=827, Unknown=1, NotChecked=0, Total=930 [2019-10-15 03:01:33,097 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 31 states. [2019-10-15 03:01:39,756 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2019-10-15 03:01:40,260 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2019-10-15 03:01:40,433 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-10-15 03:01:41,163 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2019-10-15 03:01:41,695 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2019-10-15 03:01:41,949 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-10-15 03:01:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:41,954 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2019-10-15 03:01:41,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 03:01:41,955 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 20 [2019-10-15 03:01:41,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:41,956 INFO L225 Difference]: With dead ends: 48 [2019-10-15 03:01:41,957 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 03:01:41,959 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=305, Invalid=1856, Unknown=1, NotChecked=0, Total=2162 [2019-10-15 03:01:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 03:01:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-10-15 03:01:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:01:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-15 03:01:41,968 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2019-10-15 03:01:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:41,968 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-15 03:01:41,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-15 03:01:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-15 03:01:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:01:41,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:41,970 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:42,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:42,173 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash 322407660, now seen corresponding path program 2 times [2019-10-15 03:01:42,174 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:42,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917192188] [2019-10-15 03:01:42,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:42,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:42,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:01:42,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917192188] [2019-10-15 03:01:42,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581191915] [2019-10-15 03:01:42,331 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:48,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:01:48,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:48,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-15 03:01:48,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 03:01:48,864 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:51,040 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2019-10-15 03:01:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:01:51,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818727456] [2019-10-15 03:01:51,047 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 03:01:51,047 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:51,048 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:51,048 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:51,048 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:51,092 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:51,156 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:51,391 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2019-10-15 03:01:51,435 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:51,439 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:52,353 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:52,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 13, 11] total 32 [2019-10-15 03:01:52,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120670913] [2019-10-15 03:01:52,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 03:01:52,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:52,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 03:01:52,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2019-10-15 03:01:52,356 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 32 states. [2019-10-15 03:01:57,187 WARN L191 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2019-10-15 03:01:57,491 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2019-10-15 03:01:57,827 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2019-10-15 03:02:00,545 WARN L191 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2019-10-15 03:02:01,275 WARN L191 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2019-10-15 03:02:01,651 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2019-10-15 03:02:01,993 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2019-10-15 03:02:02,243 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2019-10-15 03:02:02,495 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2019-10-15 03:02:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:02,508 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2019-10-15 03:02:02,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-15 03:02:02,508 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 28 [2019-10-15 03:02:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:02,511 INFO L225 Difference]: With dead ends: 85 [2019-10-15 03:02:02,512 INFO L226 Difference]: Without dead ends: 65 [2019-10-15 03:02:02,514 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=641, Invalid=3265, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 03:02:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-15 03:02:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2019-10-15 03:02:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 03:02:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-15 03:02:02,537 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 28 [2019-10-15 03:02:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:02,538 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-15 03:02:02,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 03:02:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-15 03:02:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 03:02:02,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:02,541 INFO L380 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:02,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:02,749 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:02,749 INFO L82 PathProgramCache]: Analyzing trace with hash 57683084, now seen corresponding path program 3 times [2019-10-15 03:02:02,750 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:02,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061041503] [2019-10-15 03:02:02,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:02,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:02,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:02:03,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061041503] [2019-10-15 03:02:03,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55460312] [2019-10-15 03:02:03,040 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:03,127 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:02:03,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:03,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-15 03:02:03,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:03,158 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:02:03,217 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:02:03,335 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:02:03,496 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:02:03,643 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:02:03,770 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:02:04,156 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:02:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 03:02:04,252 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:04,865 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-15 03:02:06,015 WARN L191 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 14 [2019-10-15 03:02:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 03:02:06,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428832415] [2019-10-15 03:02:06,174 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 03:02:06,174 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:06,175 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:06,175 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:06,175 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:06,210 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:02:06,265 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:02:06,329 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:02:06,342 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:02:06,346 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:06,902 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:06,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12, 12] total 40 [2019-10-15 03:02:06,903 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200659898] [2019-10-15 03:02:06,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 03:02:06,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:06,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 03:02:06,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 03:02:06,907 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 40 states.