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-tiling/nr4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:38:06,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:38:06,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:38:06,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:38:06,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:38:06,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:38:06,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:38:06,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:38:06,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:38:06,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:38:06,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:38:06,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:38:06,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:38:06,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:38:06,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:38:06,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:38:06,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:38:06,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:38:06,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:38:06,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:38:06,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:38:06,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:38:06,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:38:06,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:38:06,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:38:06,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:38:06,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:38:06,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:38:06,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:38:06,651 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:38:06,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:38:06,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:38:06,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:38:06,654 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:38:06,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:38:06,654 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:38:06,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:38:06,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:38:06,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:38:06,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:38:06,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:38:06,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:38:06,657 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:38:06,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:38:06,657 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:38:06,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:38:06,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:38:06,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:38:06,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:38:06,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:38:06,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:06,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:38:06,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:38:06,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:38:06,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:38:06,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:38:06,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:38:06,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:38:06,951 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:38:06,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:38:06,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:38:06,969 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:38:06,969 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:38:06,970 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr4.c [2019-10-15 01:38:07,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3dedc506/7b4d780ba6124030b7d0dd4bc28c91c0/FLAGc48991c93 [2019-10-15 01:38:07,515 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:38:07,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr4.c [2019-10-15 01:38:07,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3dedc506/7b4d780ba6124030b7d0dd4bc28c91c0/FLAGc48991c93 [2019-10-15 01:38:07,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3dedc506/7b4d780ba6124030b7d0dd4bc28c91c0 [2019-10-15 01:38:07,948 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:38:07,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:38:07,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:07,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:38:07,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:38:07,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:07,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39284e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07, skipping insertion in model container [2019-10-15 01:38:07,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:07,969 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:38:07,991 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:38:08,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:08,182 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:38:08,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:08,322 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:38:08,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08 WrapperNode [2019-10-15 01:38:08,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:08,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:38:08,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:38:08,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:38:08,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:38:08,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:38:08,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:38:08,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:38:08,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:08,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:38:08,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:38:08,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:38:08,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:38:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:38:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:38:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:38:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:38:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:38:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:38:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:38:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:38:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:38:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:38:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:38:08,852 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:38:08,852 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:38:08,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:08 BoogieIcfgContainer [2019-10-15 01:38:08,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:38:08,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:38:08,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:38:08,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:38:08,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:38:07" (1/3) ... [2019-10-15 01:38:08,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7949939e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:08, skipping insertion in model container [2019-10-15 01:38:08,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (2/3) ... [2019-10-15 01:38:08,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7949939e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:08, skipping insertion in model container [2019-10-15 01:38:08,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:08" (3/3) ... [2019-10-15 01:38:08,863 INFO L109 eAbstractionObserver]: Analyzing ICFG nr4.c [2019-10-15 01:38:08,873 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:38:08,882 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:38:08,894 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:38:08,920 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:38:08,921 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:38:08,921 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:38:08,921 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:38:08,921 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:38:08,922 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:38:08,922 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:38:08,922 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:38:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:38:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:38:08,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:08,947 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:08,949 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1583936272, now seen corresponding path program 1 times [2019-10-15 01:38:08,962 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:08,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618670573] [2019-10-15 01:38:08,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:08,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:08,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618670573] [2019-10-15 01:38:09,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:09,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:38:09,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585515630] [2019-10-15 01:38:09,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:38:09,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:09,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:38:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:38:09,382 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2019-10-15 01:38:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:09,478 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-15 01:38:09,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:38:09,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:38:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:09,489 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:38:09,489 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:38:09,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:38:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:38:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-15 01:38:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:38:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-15 01:38:09,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2019-10-15 01:38:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:09,536 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-15 01:38:09,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:38:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-15 01:38:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:38:09,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:09,539 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:09,539 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:09,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:09,540 INFO L82 PathProgramCache]: Analyzing trace with hash 362962816, now seen corresponding path program 1 times [2019-10-15 01:38:09,541 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:09,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216831667] [2019-10-15 01:38:09,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216831667] [2019-10-15 01:38:09,611 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:09,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:38:09,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830626785] [2019-10-15 01:38:09,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:38:09,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:38:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:38:09,617 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2019-10-15 01:38:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:09,638 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:38:09,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:38:09,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-15 01:38:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:09,640 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:38:09,640 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:38:09,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:38:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:38:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:38:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:38:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-15 01:38:09,648 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-15 01:38:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:09,648 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-15 01:38:09,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:38:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-15 01:38:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:38:09,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:09,649 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:09,650 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash -561578652, now seen corresponding path program 1 times [2019-10-15 01:38:09,651 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:09,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882318091] [2019-10-15 01:38:09,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882318091] [2019-10-15 01:38:09,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5729596] [2019-10-15 01:38:09,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:38:09,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,830 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808555403] [2019-10-15 01:38:09,897 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:38:09,898 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:09,905 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:09,913 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:09,914 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:10,106 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:38:10,507 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,322 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-10-15 01:38:11,373 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:11,383 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:11,830 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-10-15 01:38:12,148 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2019-10-15 01:38:12,303 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 25 [2019-10-15 01:38:12,655 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:12,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 18 [2019-10-15 01:38:12,656 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117449373] [2019-10-15 01:38:12,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:38:12,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:12,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:38:12,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:38:12,664 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 18 states. [2019-10-15 01:38:13,017 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2019-10-15 01:38:13,455 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2019-10-15 01:38:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:13,844 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-15 01:38:13,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:38:13,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-10-15 01:38:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:13,849 INFO L225 Difference]: With dead ends: 45 [2019-10-15 01:38:13,849 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:38:13,853 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:38:13,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:38:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2019-10-15 01:38:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 01:38:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-15 01:38:13,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2019-10-15 01:38:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:13,867 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-15 01:38:13,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:38:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-15 01:38:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:38:13,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:13,869 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:14,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:14,073 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2026682496, now seen corresponding path program 2 times [2019-10-15 01:38:14,074 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:14,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677326695] [2019-10-15 01:38:14,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:14,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:14,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:14,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677326695] [2019-10-15 01:38:14,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68803321] [2019-10-15 01:38:14,639 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:14,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:38:14,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:14,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-15 01:38:14,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:14,843 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,257 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-15 01:38:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:15,704 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:16,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463917285] [2019-10-15 01:38:16,394 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:38:16,394 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:16,394 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:16,394 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:16,395 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:16,424 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:38:16,607 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:17,094 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-10-15 01:38:17,140 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:17,145 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:18,034 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2019-10-15 01:38:18,620 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:18,620 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12, 12] total 41 [2019-10-15 01:38:18,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964946228] [2019-10-15 01:38:18,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-15 01:38:18,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:18,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-15 01:38:18,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:38:18,624 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 41 states. [2019-10-15 01:38:18,979 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-10-15 01:38:19,209 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2019-10-15 01:38:19,742 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2019-10-15 01:38:20,002 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 61 [2019-10-15 01:38:20,428 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2019-10-15 01:38:20,692 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2019-10-15 01:38:20,893 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2019-10-15 01:38:21,116 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2019-10-15 01:38:21,308 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2019-10-15 01:38:23,827 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-10-15 01:38:24,293 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2019-10-15 01:38:24,876 WARN L191 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2019-10-15 01:38:25,219 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-10-15 01:38:25,379 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2019-10-15 01:38:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:25,913 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-10-15 01:38:25,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-15 01:38:25,914 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 19 [2019-10-15 01:38:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:25,917 INFO L225 Difference]: With dead ends: 62 [2019-10-15 01:38:25,917 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:38:25,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=603, Invalid=4227, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:38:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:38:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2019-10-15 01:38:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-15 01:38:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-10-15 01:38:25,960 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 19 [2019-10-15 01:38:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:25,960 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-10-15 01:38:25,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-15 01:38:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-10-15 01:38:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:38:25,968 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:25,968 INFO L380 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:26,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:26,173 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash 266885692, now seen corresponding path program 1 times [2019-10-15 01:38:26,173 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:26,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512872118] [2019-10-15 01:38:26,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:26,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:26,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:26,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512872118] [2019-10-15 01:38:26,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343317833] [2019-10-15 01:38:26,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:27,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-15 01:38:27,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:27,172 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:27,296 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:27,595 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:27,819 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:27,984 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:28,123 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:30,776 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 29 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:38:41,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409997033] [2019-10-15 01:38:41,066 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:38:41,066 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:41,066 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:41,067 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:41,067 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:41,094 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:38:41,258 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:42,107 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-10-15 01:38:42,135 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:42,138 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:43,114 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2019-10-15 01:38:43,649 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2019-10-15 01:38:44,309 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:44,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 18, 14] total 61 [2019-10-15 01:38:44,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133015206] [2019-10-15 01:38:44,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 01:38:44,311 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 01:38:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=3228, Unknown=8, NotChecked=0, Total=3660 [2019-10-15 01:38:44,313 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 61 states. [2019-10-15 01:38:44,710 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-10-15 01:38:44,959 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-10-15 01:38:45,799 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 62 [2019-10-15 01:38:45,995 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-10-15 01:38:46,601 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2019-10-15 01:38:46,920 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66