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/rewrev.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:38:51,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:38:51,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:38:51,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:38:51,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:38:51,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:38:51,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:38:51,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:38:51,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:38:51,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:38:51,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:38:51,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:38:51,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:38:51,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:38:51,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:38:51,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:38:51,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:38:51,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:38:51,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:38:51,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:38:51,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:38:51,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:38:51,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:38:51,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:38:51,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:38:51,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:38:51,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:38:51,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:38:51,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:38:51,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:38:51,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:38:51,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:38:51,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:38:51,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:38:51,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:38:51,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:38:51,663 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 01:38:51,686 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:38:51,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:38:51,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:38:51,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:38:51,691 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:38:51,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:38:51,692 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:38:51,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:38:51,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:38:51,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:38:51,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:38:51,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:38:51,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:38:51,694 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:38:51,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:38:51,695 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:38:51,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:38:51,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:38:51,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:38:51,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:38:51,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:38:51,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:51,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:38:51,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:38:51,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:38:51,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:38:51,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:38:51,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:38:51,697 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 01:38:51,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:38:51,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:38:52,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:38:52,001 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:38:52,003 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:38:52,003 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rewrev.c [2019-10-15 01:38:52,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f1a3a0a/d1f855f31f674480a7ae0ae2a2e10245/FLAGe94e1c727 [2019-10-15 01:38:52,569 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:38:52,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewrev.c [2019-10-15 01:38:52,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f1a3a0a/d1f855f31f674480a7ae0ae2a2e10245/FLAGe94e1c727 [2019-10-15 01:38:52,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f1a3a0a/d1f855f31f674480a7ae0ae2a2e10245 [2019-10-15 01:38:52,970 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:38:52,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:38:52,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:52,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:38:52,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:38:52,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:52" (1/1) ... [2019-10-15 01:38:52,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409c6ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:52, skipping insertion in model container [2019-10-15 01:38:52,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:52" (1/1) ... [2019-10-15 01:38:52,988 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:38:53,010 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:38:53,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:53,203 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:38:53,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:53,236 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:38:53,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53 WrapperNode [2019-10-15 01:38:53,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:53,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:38:53,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:38:53,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:38:53,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53" (1/1) ... [2019-10-15 01:38:53,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53" (1/1) ... [2019-10-15 01:38:53,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53" (1/1) ... [2019-10-15 01:38:53,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53" (1/1) ... [2019-10-15 01:38:53,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53" (1/1) ... [2019-10-15 01:38:53,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53" (1/1) ... [2019-10-15 01:38:53,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53" (1/1) ... [2019-10-15 01:38:53,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:38:53,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:38:53,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:38:53,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:38:53,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53" (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 01:38:53,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:38:53,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:38:53,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:38:53,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:38:53,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:38:53,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:38:53,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:38:53,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:38:53,423 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:38:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:38:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:38:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:38:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:38:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:38:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:38:53,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:38:53,780 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:38:53,780 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:38:53,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:53 BoogieIcfgContainer [2019-10-15 01:38:53,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:38:53,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:38:53,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:38:53,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:38:53,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:38:52" (1/3) ... [2019-10-15 01:38:53,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fc7c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:53, skipping insertion in model container [2019-10-15 01:38:53,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:53" (2/3) ... [2019-10-15 01:38:53,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fc7c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:53, skipping insertion in model container [2019-10-15 01:38:53,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:53" (3/3) ... [2019-10-15 01:38:53,790 INFO L109 eAbstractionObserver]: Analyzing ICFG rewrev.c [2019-10-15 01:38:53,800 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:38:53,806 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:38:53,816 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:38:53,838 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:38:53,839 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:38:53,839 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:38:53,839 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:38:53,839 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:38:53,839 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:38:53,839 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:38:53,839 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:38:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:38:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:38:53,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:53,858 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:53,860 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:53,864 INFO L82 PathProgramCache]: Analyzing trace with hash 698834392, now seen corresponding path program 1 times [2019-10-15 01:38:53,870 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:53,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349580620] [2019-10-15 01:38:53,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:53,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:53,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:54,031 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 01:38:54,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349580620] [2019-10-15 01:38:54,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:54,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:38:54,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344209461] [2019-10-15 01:38:54,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:38:54,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:54,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:38:54,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:38:54,051 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:38:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:54,093 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-10-15 01:38:54,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:38:54,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:38:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:54,102 INFO L225 Difference]: With dead ends: 36 [2019-10-15 01:38:54,102 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:38:54,105 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 01:38:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:38:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:38:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:38:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-15 01:38:54,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2019-10-15 01:38:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:54,140 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-15 01:38:54,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:38:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-15 01:38:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:38:54,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:54,142 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:54,142 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:54,143 INFO L82 PathProgramCache]: Analyzing trace with hash -494855414, now seen corresponding path program 1 times [2019-10-15 01:38:54,143 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:54,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992567132] [2019-10-15 01:38:54,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:54,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:54,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:54,238 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 01:38:54,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992567132] [2019-10-15 01:38:54,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918702893] [2019-10-15 01:38:54,240 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 01:38:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:54,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:38:54,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:54,354 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 01:38:54,355 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:54,379 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 01:38:54,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691048384] [2019-10-15 01:38:54,404 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:38:54,404 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:54,411 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:54,419 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:54,420 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:54,701 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:55,263 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2019-10-15 01:38:55,283 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:55,294 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:55,825 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2019-10-15 01:38:56,083 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-10-15 01:38:56,155 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:56,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 15 [2019-10-15 01:38:56,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262093767] [2019-10-15 01:38:56,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-15 01:38:56,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:56,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-15 01:38:56,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:38:56,160 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2019-10-15 01:38:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:56,722 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-10-15 01:38:56,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:38:56,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2019-10-15 01:38:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:56,726 INFO L225 Difference]: With dead ends: 39 [2019-10-15 01:38:56,730 INFO L226 Difference]: Without dead ends: 30 [2019-10-15 01:38:56,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:38:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-15 01:38:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2019-10-15 01:38:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:38:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-15 01:38:56,754 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-10-15 01:38:56,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:56,755 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-15 01:38:56,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-15 01:38:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-15 01:38:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:38:56,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:56,756 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:56,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:56,960 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1155466264, now seen corresponding path program 2 times [2019-10-15 01:38:56,961 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:56,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372757727] [2019-10-15 01:38:56,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:56,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:56,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:57,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372757727] [2019-10-15 01:38:57,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206657931] [2019-10-15 01:38:57,173 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 01:38:57,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:38:57,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:57,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:38:57,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:57,488 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:57,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1001944684] [2019-10-15 01:38:57,654 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:38:57,654 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:57,654 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:57,654 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:57,655 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:57,722 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:58,157 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2019-10-15 01:38:58,170 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:58,178 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:58,832 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2019-10-15 01:38:59,221 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:59,222 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 32 [2019-10-15 01:38:59,222 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376783496] [2019-10-15 01:38:59,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:38:59,224 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:59,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:38:59,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:38:59,226 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 32 states. [2019-10-15 01:39:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:00,467 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-10-15 01:39:00,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:39:00,467 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 14 [2019-10-15 01:39:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:00,468 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:39:00,469 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:39:00,470 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=249, Invalid=1557, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 01:39:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:39:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-10-15 01:39:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:39:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-15 01:39:00,479 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2019-10-15 01:39:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:00,480 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-15 01:39:00,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:39:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-15 01:39:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:39:00,481 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:00,482 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:00,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:00,686 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1734055745, now seen corresponding path program 1 times [2019-10-15 01:39:00,687 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:00,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053101499] [2019-10-15 01:39:00,687 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:00,687 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:00,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:00,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053101499] [2019-10-15 01:39:00,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188856409] [2019-10-15 01:39:00,870 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 01:39:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:00,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-15 01:39:00,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:03,548 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 01:39:03,549 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:03,802 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 01:39:03,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [400303649] [2019-10-15 01:39:03,805 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:39:03,805 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:39:03,806 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:39:03,806 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:39:03,806 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:39:03,846 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:39:04,748 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:39:04,830 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:39:04,836 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:39:07,882 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2019-10-15 01:39:08,502 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:39:08,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10, 12] total 39 [2019-10-15 01:39:08,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838651863] [2019-10-15 01:39:08,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:39:08,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:08,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:39:08,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1328, Unknown=1, NotChecked=0, Total=1482 [2019-10-15 01:39:08,505 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 39 states. [2019-10-15 01:39:15,089 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2019-10-15 01:39:15,286 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2019-10-15 01:39:15,730 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2019-10-15 01:39:16,293 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2019-10-15 01:39:16,618 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2019-10-15 01:39:16,918 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2019-10-15 01:39:17,291 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2019-10-15 01:39:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:19,641 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2019-10-15 01:39:19,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:39:19,642 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 21 [2019-10-15 01:39:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:19,645 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:39:19,645 INFO L226 Difference]: Without dead ends: 41 [2019-10-15 01:39:19,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=408, Invalid=3013, Unknown=1, NotChecked=0, Total=3422 [2019-10-15 01:39:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-15 01:39:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-15 01:39:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:39:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-15 01:39:19,661 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 21 [2019-10-15 01:39:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:19,662 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-15 01:39:19,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:39:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-15 01:39:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:39:19,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:19,664 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:19,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:19,865 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash 648727096, now seen corresponding path program 2 times [2019-10-15 01:39:19,866 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:19,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325154381] [2019-10-15 01:39:19,867 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:19,868 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:19,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:39:19,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325154381] [2019-10-15 01:39:19,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000844400] [2019-10-15 01:39:19,940 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 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 01:39:20,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:39:20,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:39:20,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:39:20,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:39:20,051 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:39:20,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [667070059] [2019-10-15 01:39:20,110 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:39:20,110 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:39:20,110 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:39:20,111 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:39:20,111 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:39:20,135 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2019-10-15 01:39:20,644 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:39:20,685 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:39:20,688 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:39:21,189 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 33 [2019-10-15 01:39:21,503 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2019-10-15 01:39:21,988 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:39:21,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 12] total 27 [2019-10-15 01:39:21,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411495201] [2019-10-15 01:39:21,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-15 01:39:21,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:21,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-15 01:39:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:39:21,992 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 27 states. [2019-10-15 01:39:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:23,644 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2019-10-15 01:39:23,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-15 01:39:23,645 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2019-10-15 01:39:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:23,646 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:39:23,646 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 01:39:23,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:39:23,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 01:39:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-15 01:39:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:39:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-10-15 01:39:23,661 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 28 [2019-10-15 01:39:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:23,661 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-10-15 01:39:23,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-15 01:39:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-10-15 01:39:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:39:23,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:23,663 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:23,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:23,875 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:23,875 INFO L82 PathProgramCache]: Analyzing trace with hash 932701034, now seen corresponding path program 3 times [2019-10-15 01:39:23,875 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:23,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678747976] [2019-10-15 01:39:23,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:23,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:23,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:24,225 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 01:39:24,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678747976] [2019-10-15 01:39:24,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754410154] [2019-10-15 01:39:24,226 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:24,305 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:39:24,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:39:24,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-15 01:39:24,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:24,538 WARN L225 Elim1Store]: Array PQE input equivalent to false