java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:51,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:51,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:51,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:51,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:51,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:51,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:51,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:51,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:51,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:51,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:51,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:51,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:51,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:51,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:51,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:51,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:51,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:51,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:51,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:51,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:51,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:51,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:51,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:51,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:51,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:51,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:51,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:51,505 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 01:34:51,524 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:51,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:51,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:51,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:51,526 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:51,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:51,527 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:51,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:51,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:51,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:51,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:51,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:51,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:51,529 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:51,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:51,530 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:51,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:51,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:51,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:51,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:51,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:51,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:51,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:51,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:51,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:51,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:51,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:51,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:51,533 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 01:34:51,833 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:51,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:51,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:51,856 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:51,856 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:51,857 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2019-10-15 01:34:51,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d012ead6/a61887a1ea2f4c73bf41cc16e651ada2/FLAGe265e9d9a [2019-10-15 01:34:52,376 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:52,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2019-10-15 01:34:52,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d012ead6/a61887a1ea2f4c73bf41cc16e651ada2/FLAGe265e9d9a [2019-10-15 01:34:52,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d012ead6/a61887a1ea2f4c73bf41cc16e651ada2 [2019-10-15 01:34:52,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:52,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:52,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:52,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:52,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:52,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17462506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52, skipping insertion in model container [2019-10-15 01:34:52,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,771 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:52,789 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:52,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:52,967 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:52,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:53,015 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:53,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53 WrapperNode [2019-10-15 01:34:53,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:53,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:53,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:53,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:53,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53" (1/1) ... [2019-10-15 01:34:53,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53" (1/1) ... [2019-10-15 01:34:53,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53" (1/1) ... [2019-10-15 01:34:53,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53" (1/1) ... [2019-10-15 01:34:53,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53" (1/1) ... [2019-10-15 01:34:53,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53" (1/1) ... [2019-10-15 01:34:53,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53" (1/1) ... [2019-10-15 01:34:53,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:53,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:53,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:53,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:53,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53" (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 01:34:53,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:53,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:53,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:53,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:53,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:53,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:34:53,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:53,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:53,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:53,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:53,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:53,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:53,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:53,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:53,718 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:53,718 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:34:53,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:53 BoogieIcfgContainer [2019-10-15 01:34:53,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:53,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:53,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:53,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:53,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:52" (1/3) ... [2019-10-15 01:34:53,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e36d309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:53, skipping insertion in model container [2019-10-15 01:34:53,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:53" (2/3) ... [2019-10-15 01:34:53,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e36d309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:53, skipping insertion in model container [2019-10-15 01:34:53,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:53" (3/3) ... [2019-10-15 01:34:53,730 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2019-10-15 01:34:53,737 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:53,746 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:53,758 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:53,781 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:53,781 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:53,781 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:53,782 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:53,782 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:53,782 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:53,782 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:53,782 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:34:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:34:53,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:53,806 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:53,807 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:53,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:53,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1921227635, now seen corresponding path program 1 times [2019-10-15 01:34:53,820 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:53,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231467444] [2019-10-15 01:34:53,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:53,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:53,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:54,006 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 01:34:54,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231467444] [2019-10-15 01:34:54,008 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:54,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:54,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147384315] [2019-10-15 01:34:54,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:54,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:54,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:54,035 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-10-15 01:34:54,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:54,086 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2019-10-15 01:34:54,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:54,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:34:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:54,100 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:34:54,100 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:34:54,107 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 01:34:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:34:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:34:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:34:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:34:54,151 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2019-10-15 01:34:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:54,152 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:34:54,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:34:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:34:54,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:54,153 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:54,154 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1598045320, now seen corresponding path program 1 times [2019-10-15 01:34:54,155 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:54,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884705288] [2019-10-15 01:34:54,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:54,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:54,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:54,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884705288] [2019-10-15 01:34:54,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553766840] [2019-10-15 01:34:54,299 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 01:34:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:54,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:54,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:54,409 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:54,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186325021] [2019-10-15 01:34:54,501 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:54,501 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:54,507 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:54,513 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:54,513 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:54,670 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:55,157 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:34:55,172 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:55,179 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:55,506 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:55,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:34:55,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043811057] [2019-10-15 01:34:55,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:55,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:55,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:55,514 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 17 states. [2019-10-15 01:34:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:56,212 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2019-10-15 01:34:56,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:56,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 01:34:56,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:56,215 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:34:56,215 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:34:56,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:34:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2019-10-15 01:34:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:34:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-15 01:34:56,240 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 14 [2019-10-15 01:34:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:56,243 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-15 01:34:56,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-15 01:34:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:34:56,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:56,246 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:56,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:56,452 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:56,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1908337869, now seen corresponding path program 2 times [2019-10-15 01:34:56,452 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:56,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524481839] [2019-10-15 01:34:56,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:56,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:56,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:56,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524481839] [2019-10-15 01:34:56,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907377915] [2019-10-15 01:34:56,617 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 01:34:56,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:56,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:56,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:56,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:56,710 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:56,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650939949] [2019-10-15 01:34:56,789 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:56,790 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:56,790 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:56,790 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:56,791 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:56,823 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:57,165 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:34:57,190 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:57,197 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:57,487 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:57,488 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:34:57,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860818605] [2019-10-15 01:34:57,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:57,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:57,490 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 23 states. [2019-10-15 01:34:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:58,324 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2019-10-15 01:34:58,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:58,324 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-10-15 01:34:58,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:58,326 INFO L225 Difference]: With dead ends: 74 [2019-10-15 01:34:58,326 INFO L226 Difference]: Without dead ends: 51 [2019-10-15 01:34:58,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-15 01:34:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-10-15 01:34:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-15 01:34:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2019-10-15 01:34:58,338 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2019-10-15 01:34:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:58,339 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2019-10-15 01:34:58,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2019-10-15 01:34:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:34:58,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:58,340 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:58,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:58,544 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash 854387411, now seen corresponding path program 3 times [2019-10-15 01:34:58,545 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:58,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855182986] [2019-10-15 01:34:58,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:58,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:58,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:58,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855182986] [2019-10-15 01:34:58,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440327270] [2019-10-15 01:34:58,985 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 01:34:59,072 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:59,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:59,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:59,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:59,101 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:59,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830915779] [2019-10-15 01:34:59,327 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:59,327 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:59,341 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:59,341 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:59,342 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:59,379 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:59,721 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:34:59,730 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:59,734 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:00,113 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:00,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:35:00,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121573239] [2019-10-15 01:35:00,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:35:00,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:00,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:35:00,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:35:00,117 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 35 states. [2019-10-15 01:35:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:01,664 INFO L93 Difference]: Finished difference Result 104 states and 139 transitions. [2019-10-15 01:35:01,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:35:01,664 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2019-10-15 01:35:01,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:01,666 INFO L225 Difference]: With dead ends: 104 [2019-10-15 01:35:01,667 INFO L226 Difference]: Without dead ends: 75 [2019-10-15 01:35:01,669 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=979, Invalid=3053, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:35:01,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-15 01:35:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2019-10-15 01:35:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-15 01:35:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2019-10-15 01:35:01,685 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 32 [2019-10-15 01:35:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:01,685 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2019-10-15 01:35:01,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:35:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2019-10-15 01:35:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:35:01,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:01,688 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:01,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:01,900 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:01,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1220247021, now seen corresponding path program 4 times [2019-10-15 01:35:01,901 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:01,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245386550] [2019-10-15 01:35:01,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:01,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:01,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:02,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245386550] [2019-10-15 01:35:02,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332326618] [2019-10-15 01:35:02,537 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 01:35:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:02,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:35:02,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:02,680 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:03,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [540100092] [2019-10-15 01:35:03,396 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:03,396 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:03,396 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:03,397 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:03,397 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:03,429 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:03,702 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:03,710 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:03,716 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:04,050 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:04,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-15 01:35:04,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123812036] [2019-10-15 01:35:04,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:35:04,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:35:04,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:35:04,055 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 59 states. [2019-10-15 01:35:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:07,329 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2019-10-15 01:35:07,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:35:07,330 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 56 [2019-10-15 01:35:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:07,332 INFO L225 Difference]: With dead ends: 164 [2019-10-15 01:35:07,332 INFO L226 Difference]: Without dead ends: 123 [2019-10-15 01:35:07,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3607, Invalid=8825, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:35:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-15 01:35:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2019-10-15 01:35:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-15 01:35:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2019-10-15 01:35:07,355 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 56 [2019-10-15 01:35:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:07,356 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2019-10-15 01:35:07,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:35:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2019-10-15 01:35:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:35:07,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:07,360 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:07,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:07,564 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:07,564 INFO L82 PathProgramCache]: Analyzing trace with hash 951799955, now seen corresponding path program 5 times [2019-10-15 01:35:07,565 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:07,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286836243] [2019-10-15 01:35:07,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:07,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:07,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:35:09,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286836243] [2019-10-15 01:35:09,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152203706] [2019-10-15 01:35:09,962 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true