java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:01:21,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:01:21,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:01:21,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:01:21,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:01:21,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:01:21,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:01:21,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:01:21,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:01:21,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:01:21,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:01:21,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:01:21,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:01:21,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:01:21,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:01:21,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:01:21,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:01:21,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:01:21,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:01:21,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:01:21,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:01:21,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:01:21,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:01:21,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:01:21,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:01:21,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:01:21,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:01:21,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:01:21,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:01:21,757 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:01:21,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:01:21,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:01:21,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:01:21,759 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:01:21,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:01:21,759 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:01:21,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:01:21,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:01:21,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:01:21,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:01:21,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:01:21,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:01:21,761 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:01:21,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:01:21,761 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:01:21,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:01:21,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:01:21,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:01:21,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:01:21,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:01:21,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:01:21,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:01:21,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:01:21,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:01:21,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:01:21,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:01:21,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:01:21,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:01:22,087 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:01:22,111 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:01:22,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:01:22,119 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:01:22,119 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:01:22,120 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-10-15 03:01:22,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54362ea04/56fa4a8ec21f4aa2831d4a6d405dbe8e/FLAGccf0b36d8 [2019-10-15 03:01:22,709 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:01:22,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-10-15 03:01:22,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54362ea04/56fa4a8ec21f4aa2831d4a6d405dbe8e/FLAGccf0b36d8 [2019-10-15 03:01:23,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54362ea04/56fa4a8ec21f4aa2831d4a6d405dbe8e [2019-10-15 03:01:23,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:01:23,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:01:23,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:23,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:01:23,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:01:23,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d3c52bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23, skipping insertion in model container [2019-10-15 03:01:23,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,127 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:01:23,148 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:01:23,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:23,359 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:01:23,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:23,400 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:01:23,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23 WrapperNode [2019-10-15 03:01:23,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:23,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:01:23,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:01:23,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:01:23,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... [2019-10-15 03:01:23,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:01:23,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:01:23,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:01:23,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:01:23,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:01:23,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:01:23,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:01:23,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:01:23,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:01:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:01:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:01:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:01:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:01:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:01:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:01:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:01:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:01:23,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:01:23,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:01:23,864 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:01:23,864 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 03:01:23,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:23 BoogieIcfgContainer [2019-10-15 03:01:23,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:01:23,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:01:23,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:01:23,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:01:23,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:01:23" (1/3) ... [2019-10-15 03:01:23,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af00f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:23, skipping insertion in model container [2019-10-15 03:01:23,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:23" (2/3) ... [2019-10-15 03:01:23,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af00f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:23, skipping insertion in model container [2019-10-15 03:01:23,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:23" (3/3) ... [2019-10-15 03:01:23,875 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2019-10-15 03:01:23,886 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:01:23,898 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:01:23,915 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:01:23,959 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:01:23,959 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:01:23,959 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:01:23,960 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:01:23,960 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:01:23,961 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:01:23,961 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:01:23,961 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:01:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-15 03:01:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:01:23,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:24,000 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:24,003 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash 793121937, now seen corresponding path program 1 times [2019-10-15 03:01:24,020 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:24,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448431234] [2019-10-15 03:01:24,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:24,021 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:24,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:24,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448431234] [2019-10-15 03:01:24,240 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:01:24,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:01:24,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060508454] [2019-10-15 03:01:24,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:01:24,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:24,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:01:24,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:01:24,257 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-10-15 03:01:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:24,334 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-10-15 03:01:24,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:01:24,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 03:01:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:24,348 INFO L225 Difference]: With dead ends: 34 [2019-10-15 03:01:24,349 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 03:01:24,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:01:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 03:01:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2019-10-15 03:01:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 03:01:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 03:01:24,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-10-15 03:01:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:24,392 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 03:01:24,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:01:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 03:01:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:01:24,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:24,394 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:24,394 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:24,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:24,395 INFO L82 PathProgramCache]: Analyzing trace with hash 751349671, now seen corresponding path program 1 times [2019-10-15 03:01:24,395 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:24,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965246250] [2019-10-15 03:01:24,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:24,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:24,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:24,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965246250] [2019-10-15 03:01:24,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320784890] [2019-10-15 03:01:24,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:24,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-15 03:01:24,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:24,661 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-15 03:01:24,661 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 03:01:24,669 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 03:01:24,669 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 03:01:24,670 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-15 03:01:24,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:24,772 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:24,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:24,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:25,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:25,087 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-15 03:01:25,087 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 03:01:25,108 INFO L567 ElimStorePlain]: treesize reduction 6, result has 80.6 percent of original size [2019-10-15 03:01:25,116 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2019-10-15 03:01:25,133 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2019-10-15 03:01:25,137 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2019-10-15 03:01:25,154 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 03:01:25,157 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-10-15 03:01:25,184 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 03:01:25,185 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 03:01:25,186 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:63, output treesize:22 [2019-10-15 03:01:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:25,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925825066] [2019-10-15 03:01:25,269 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:01:25,273 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:25,278 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:25,285 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:25,286 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:25,418 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:25,596 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:25,753 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 03:01:25,774 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:25,786 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:26,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:26,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8, 9] total 24 [2019-10-15 03:01:26,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994996130] [2019-10-15 03:01:26,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 03:01:26,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:26,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 03:01:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:01:26,552 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 24 states. [2019-10-15 03:01:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:27,770 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-10-15 03:01:27,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:01:27,771 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2019-10-15 03:01:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:27,773 INFO L225 Difference]: With dead ends: 38 [2019-10-15 03:01:27,773 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 03:01:27,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 03:01:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 03:01:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2019-10-15 03:01:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 03:01:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-15 03:01:27,782 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2019-10-15 03:01:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:27,782 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-15 03:01:27,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 03:01:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-15 03:01:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 03:01:27,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:27,783 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:27,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:27,996 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash -543590575, now seen corresponding path program 2 times [2019-10-15 03:01:27,998 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:27,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928246838] [2019-10-15 03:01:27,998 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:27,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:27,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:28,079 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 03:01:28,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928246838] [2019-10-15 03:01:28,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183046115] [2019-10-15 03:01:28,080 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 03:01:28,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:01:28,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:28,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:01:28,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:28,154 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 03:01:28,154 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:28,198 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 03:01:28,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1254221272] [2019-10-15 03:01:28,215 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:01:28,215 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:28,216 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:28,216 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:28,217 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:28,269 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:28,379 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:28,456 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 03:01:28,469 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:28,475 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:28,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:28,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 9] total 18 [2019-10-15 03:01:28,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234578192] [2019-10-15 03:01:28,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:01:28,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:28,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:01:28,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:01:28,841 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2019-10-15 03:01:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:31,922 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2019-10-15 03:01:31,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 03:01:31,924 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-10-15 03:01:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:31,927 INFO L225 Difference]: With dead ends: 47 [2019-10-15 03:01:31,927 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 03:01:31,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2019-10-15 03:01:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 03:01:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 21. [2019-10-15 03:01:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:01:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-15 03:01:31,936 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 13 [2019-10-15 03:01:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:31,937 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-15 03:01:31,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:01:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-15 03:01:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 03:01:31,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:31,938 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:32,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:32,142 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:32,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2029835055, now seen corresponding path program 3 times [2019-10-15 03:01:32,143 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:32,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487087305] [2019-10-15 03:01:32,143 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:32,143 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:32,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:32,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487087305] [2019-10-15 03:01:32,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522790532] [2019-10-15 03:01:32,403 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:32,490 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:01:32,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:32,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-15 03:01:32,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:32,538 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:32,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827704009] [2019-10-15 03:01:32,770 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:01:32,770 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:32,771 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:32,771 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:32,772 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:32,826 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:32,902 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:32,970 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 03:01:32,993 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:32,998 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:33,581 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:33,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 26 [2019-10-15 03:01:33,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106625178] [2019-10-15 03:01:33,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 03:01:33,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:33,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 03:01:33,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:01:33,584 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 26 states. [2019-10-15 03:01:34,450 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2019-10-15 03:01:37,074 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2019-10-15 03:01:37,763 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2019-10-15 03:01:41,305 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-10-15 03:01:49,874 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2019-10-15 03:01:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:59,721 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2019-10-15 03:01:59,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 03:01:59,722 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 17 [2019-10-15 03:01:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:59,724 INFO L225 Difference]: With dead ends: 84 [2019-10-15 03:01:59,724 INFO L226 Difference]: Without dead ends: 75 [2019-10-15 03:01:59,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=423, Invalid=1644, Unknown=3, NotChecked=0, Total=2070 [2019-10-15 03:01:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-15 03:01:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 29. [2019-10-15 03:01:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:01:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-15 03:01:59,739 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2019-10-15 03:01:59,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:59,740 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-15 03:01:59,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 03:01:59,740 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-15 03:01:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:01:59,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:59,741 INFO L380 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:59,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:59,946 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash 45242321, now seen corresponding path program 4 times [2019-10-15 03:01:59,947 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:59,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404682984] [2019-10-15 03:01:59,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:59,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:59,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:00,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404682984] [2019-10-15 03:02:00,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009725206] [2019-10-15 03:02:00,385 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:00,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-15 03:02:00,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:00,516 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:01,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906773130] [2019-10-15 03:02:01,191 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:01,191 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:01,192 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:01,192 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:01,192 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:01,237 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:02:01,350 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:02:01,406 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 03:02:01,417 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:02:01,421 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:02,150 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:02,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 9] total 42 [2019-10-15 03:02:02,151 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940975681] [2019-10-15 03:02:02,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-15 03:02:02,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:02,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-15 03:02:02,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1362, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 03:02:02,155 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 42 states. [2019-10-15 03:02:08,967 WARN L191 SmtUtils]: Spent 5.30 s on a formula simplification. DAG size of input: 77 DAG size of output: 25