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_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:53,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:53,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:53,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:53,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:53,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:53,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:53,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:53,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:53,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:53,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:53,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:53,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:53,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:53,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:53,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:53,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:53,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:53,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:53,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:53,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:53,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:53,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:53,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:53,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:53,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:53,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:53,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:53,614 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 01:34:53,641 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:53,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:53,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:53,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:53,643 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:53,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:53,644 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:53,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:53,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:53,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:53,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:53,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:53,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:53,645 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:53,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:53,645 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:53,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:53,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:53,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:53,646 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:53,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:53,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:53,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:53,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:53,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:53,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:53,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:53,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:53,648 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 01:34:53,945 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:53,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:53,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:53,970 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:53,971 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:53,972 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-10-15 01:34:54,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/019e26276/dd6bccb705b34a1a8b05189948341e16/FLAG7e27139ca [2019-10-15 01:34:54,547 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:54,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-10-15 01:34:54,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/019e26276/dd6bccb705b34a1a8b05189948341e16/FLAG7e27139ca [2019-10-15 01:34:54,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/019e26276/dd6bccb705b34a1a8b05189948341e16 [2019-10-15 01:34:54,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:54,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:54,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:54,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:54,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:54,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26ace28b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54, skipping insertion in model container [2019-10-15 01:34:54,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,952 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:54,969 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:55,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:55,193 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:55,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:55,233 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:55,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55 WrapperNode [2019-10-15 01:34:55,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:55,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:55,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:55,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:55,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:55,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:55,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:55,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:55,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (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 01:34:55,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:34:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:55,878 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:55,878 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:34:55,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:55 BoogieIcfgContainer [2019-10-15 01:34:55,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:55,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:55,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:55,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:55,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:54" (1/3) ... [2019-10-15 01:34:55,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20915058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:55, skipping insertion in model container [2019-10-15 01:34:55,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (2/3) ... [2019-10-15 01:34:55,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20915058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:55, skipping insertion in model container [2019-10-15 01:34:55,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:55" (3/3) ... [2019-10-15 01:34:55,887 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2019-10-15 01:34:55,897 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:55,906 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:55,917 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:55,939 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:55,939 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:55,940 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:55,940 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:55,940 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:55,940 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:55,940 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:55,940 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:34:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:34:55,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:55,963 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:55,965 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -257326419, now seen corresponding path program 1 times [2019-10-15 01:34:55,978 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:55,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960779190] [2019-10-15 01:34:55,979 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,979 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,150 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 01:34:56,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960779190] [2019-10-15 01:34:56,151 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:56,152 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:56,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399286609] [2019-10-15 01:34:56,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:56,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:56,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:56,177 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-10-15 01:34:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:56,224 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-15 01:34:56,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:56,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:34:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:56,237 INFO L225 Difference]: With dead ends: 39 [2019-10-15 01:34:56,238 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:34:56,244 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 01:34:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:34:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:34:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:34:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:34:56,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2019-10-15 01:34:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:56,290 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:34:56,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:34:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:34:56,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:56,291 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:56,292 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:56,292 INFO L82 PathProgramCache]: Analyzing trace with hash 198286821, now seen corresponding path program 1 times [2019-10-15 01:34:56,293 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:56,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588265563] [2019-10-15 01:34:56,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:56,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:56,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:56,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588265563] [2019-10-15 01:34:56,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:56,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:56,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987553931] [2019-10-15 01:34:56,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:56,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:56,356 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:34:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:56,375 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:34:56,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:56,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:34:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:56,377 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:34:56,377 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:34:56,378 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 01:34:56,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:34:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:34:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:34:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:34:56,385 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-10-15 01:34:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:56,385 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:34:56,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:34:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:34:56,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:56,387 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:56,387 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:56,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1699392540, now seen corresponding path program 1 times [2019-10-15 01:34:56,388 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:56,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012568566] [2019-10-15 01:34:56,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:56,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:56,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,473 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 01:34:56,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012568566] [2019-10-15 01:34:56,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403269979] [2019-10-15 01:34:56,478 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 01:34:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:56,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:56,587 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 01:34:56,588 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:56,635 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 01:34:56,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167253319] [2019-10-15 01:34:56,688 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:56,689 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:56,696 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:56,704 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:56,705 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:56,878 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:57,258 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:34:57,274 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:57,281 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:57,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:57,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:34:57,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817830160] [2019-10-15 01:34:57,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:57,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:57,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:57,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:57,611 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 17 states. [2019-10-15 01:34:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:58,245 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-10-15 01:34:58,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:58,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 01:34:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:58,247 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:34:58,247 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:34:58,251 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:34:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-10-15 01:34:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:34:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-15 01:34:58,270 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2019-10-15 01:34:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:58,270 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-15 01:34:58,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-15 01:34:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:34:58,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:58,273 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:58,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:58,480 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:58,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1573392980, now seen corresponding path program 2 times [2019-10-15 01:34:58,480 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:58,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538397167] [2019-10-15 01:34:58,481 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:58,481 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:58,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:58,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538397167] [2019-10-15 01:34:58,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778508837] [2019-10-15 01:34:58,600 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 01:34:58,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:34:58,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:58,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:58,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:58,693 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:58,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885715949] [2019-10-15 01:34:58,720 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:58,721 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:58,722 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:58,723 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:58,723 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:58,772 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:58,992 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:34:59,002 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:59,007 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:59,377 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:59,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 01:34:59,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896040190] [2019-10-15 01:34:59,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:34:59,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:59,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:34:59,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:34:59,380 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 21 states. [2019-10-15 01:35:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:00,190 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2019-10-15 01:35:00,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:35:00,190 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 17 [2019-10-15 01:35:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:00,192 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:35:00,192 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 01:35:00,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:35:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 01:35:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2019-10-15 01:35:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:35:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-15 01:35:00,210 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2019-10-15 01:35:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:00,211 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-15 01:35:00,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:35:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-15 01:35:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:35:00,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:00,212 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:00,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:00,422 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:00,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:00,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1265542565, now seen corresponding path program 3 times [2019-10-15 01:35:00,422 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:00,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865106296] [2019-10-15 01:35:00,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:00,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:00,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:00,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865106296] [2019-10-15 01:35:00,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817181356] [2019-10-15 01:35:00,537 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 01:35:00,613 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:00,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:00,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:35:00,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:00,700 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:00,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [386448283] [2019-10-15 01:35:00,798 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:00,799 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:00,800 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:00,800 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:00,800 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:00,835 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:01,021 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:01,038 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:01,043 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:01,454 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:01,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 11] total 29 [2019-10-15 01:35:01,454 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003168317] [2019-10-15 01:35:01,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 01:35:01,455 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:01,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 01:35:01,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:35:01,456 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 29 states. [2019-10-15 01:35:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:02,578 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-10-15 01:35:02,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 01:35:02,579 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 21 [2019-10-15 01:35:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:02,581 INFO L225 Difference]: With dead ends: 71 [2019-10-15 01:35:02,581 INFO L226 Difference]: Without dead ends: 48 [2019-10-15 01:35:02,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=505, Invalid=2357, Unknown=0, NotChecked=0, Total=2862 [2019-10-15 01:35:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-15 01:35:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-10-15 01:35:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-15 01:35:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-10-15 01:35:02,592 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 21 [2019-10-15 01:35:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:02,593 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-10-15 01:35:02,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 01:35:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-10-15 01:35:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:35:02,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:02,594 INFO L380 BasicCegarLoop]: trace histogram [12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:02,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:02,801 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1864631148, now seen corresponding path program 4 times [2019-10-15 01:35:02,802 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:02,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103240373] [2019-10-15 01:35:02,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:02,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:02,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:03,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103240373] [2019-10-15 01:35:03,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729704814] [2019-10-15 01:35:03,078 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 01:35:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:03,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:35:03,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:03,188 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:03,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785556871] [2019-10-15 01:35:03,417 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:03,418 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:03,418 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:03,418 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:03,419 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:03,440 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:03,569 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:03,587 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:03,595 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:03,917 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:03,917 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:35:03,917 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845454063] [2019-10-15 01:35:03,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:35:03,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:03,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:35:03,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:35:03,921 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 39 states. [2019-10-15 01:35:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:05,290 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2019-10-15 01:35:05,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:35:05,291 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 29 [2019-10-15 01:35:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:05,292 INFO L225 Difference]: With dead ends: 86 [2019-10-15 01:35:05,293 INFO L226 Difference]: Without dead ends: 62 [2019-10-15 01:35:05,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1244, Invalid=3868, Unknown=0, NotChecked=0, Total=5112 [2019-10-15 01:35:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-15 01:35:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2019-10-15 01:35:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-15 01:35:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-10-15 01:35:05,306 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 29 [2019-10-15 01:35:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:05,306 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-10-15 01:35:05,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:35:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-10-15 01:35:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:35:05,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:05,308 INFO L380 BasicCegarLoop]: trace histogram [26, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:05,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:05,511 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:05,512 INFO L82 PathProgramCache]: Analyzing trace with hash -949417068, now seen corresponding path program 5 times [2019-10-15 01:35:05,513 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:05,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091460162] [2019-10-15 01:35:05,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,514 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:35:05,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091460162] [2019-10-15 01:35:05,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854013746] [2019-10-15 01:35:05,697 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 [2019-10-15 01:35:05,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:35:05,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:05,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:35:05,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:35:05,848 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:35:05,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324331240] [2019-10-15 01:35:05,919 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:05,920 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:05,921 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:05,921 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:05,921 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:05,944 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:06,061 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:06,067 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:06,071 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:06,353 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:06,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:35:06,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078608294] [2019-10-15 01:35:06,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:35:06,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:06,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:35:06,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:35:06,356 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 25 states. [2019-10-15 01:35:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:07,114 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2019-10-15 01:35:07,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:35:07,115 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2019-10-15 01:35:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:07,117 INFO L225 Difference]: With dead ends: 87 [2019-10-15 01:35:07,117 INFO L226 Difference]: Without dead ends: 69 [2019-10-15 01:35:07,119 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=410, Invalid=1570, Unknown=0, NotChecked=0, Total=1980 [2019-10-15 01:35:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-15 01:35:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-10-15 01:35:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-15 01:35:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2019-10-15 01:35:07,131 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 43 [2019-10-15 01:35:07,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:07,132 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2019-10-15 01:35:07,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:35:07,132 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2019-10-15 01:35:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-15 01:35:07,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:07,134 INFO L380 BasicCegarLoop]: trace histogram [26, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:07,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:07,337 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:07,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1595854099, now seen corresponding path program 6 times [2019-10-15 01:35:07,338 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:07,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469811042] [2019-10-15 01:35:07,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:07,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:07,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:07,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469811042] [2019-10-15 01:35:07,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838175190] [2019-10-15 01:35:07,731 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:07,833 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:07,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:07,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-15 01:35:07,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:07,857 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:09,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [241176688] [2019-10-15 01:35:09,060 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:09,061 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:09,061 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:09,061 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:09,062 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:09,095 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:09,214 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:09,220 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:09,223 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:09,648 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:09,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29, 11] total 67 [2019-10-15 01:35:09,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179065596] [2019-10-15 01:35:09,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-10-15 01:35:09,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:09,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-10-15 01:35:09,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1625, Invalid=2797, Unknown=0, NotChecked=0, Total=4422 [2019-10-15 01:35:09,654 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 67 states. [2019-10-15 01:35:12,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:12,817 INFO L93 Difference]: Finished difference Result 128 states and 167 transitions. [2019-10-15 01:35:12,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-10-15 01:35:12,818 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 50 [2019-10-15 01:35:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:12,820 INFO L225 Difference]: With dead ends: 128 [2019-10-15 01:35:12,821 INFO L226 Difference]: Without dead ends: 97 [2019-10-15 01:35:12,825 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4758, Invalid=11498, Unknown=0, NotChecked=0, Total=16256 [2019-10-15 01:35:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-15 01:35:12,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2019-10-15 01:35:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-15 01:35:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2019-10-15 01:35:12,838 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 50 [2019-10-15 01:35:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:12,839 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2019-10-15 01:35:12,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-10-15 01:35:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2019-10-15 01:35:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:35:12,841 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:12,842 INFO L380 BasicCegarLoop]: trace histogram [54, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:13,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:13,046 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:13,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1794894611, now seen corresponding path program 7 times [2019-10-15 01:35:13,047 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:13,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807652504] [2019-10-15 01:35:13,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:14,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807652504] [2019-10-15 01:35:14,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094412699] [2019-10-15 01:35:14,345 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:14,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-15 01:35:14,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:14,532 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:17,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271456662] [2019-10-15 01:35:17,790 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:17,790 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:17,790 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:17,790 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:17,791 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:17,818 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:17,938 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:17,948 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:17,950 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:18,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:18,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57, 11] total 123 [2019-10-15 01:35:18,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290608199] [2019-10-15 01:35:18,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 123 states [2019-10-15 01:35:18,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:18,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2019-10-15 01:35:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6357, Invalid=8649, Unknown=0, NotChecked=0, Total=15006 [2019-10-15 01:35:18,464 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 123 states. [2019-10-15 01:35:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:27,703 INFO L93 Difference]: Finished difference Result 184 states and 251 transitions. [2019-10-15 01:35:27,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2019-10-15 01:35:27,704 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 78 [2019-10-15 01:35:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:27,706 INFO L225 Difference]: With dead ends: 184 [2019-10-15 01:35:27,707 INFO L226 Difference]: Without dead ends: 153 [2019-10-15 01:35:27,713 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11039 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=18842, Invalid=38518, Unknown=0, NotChecked=0, Total=57360 [2019-10-15 01:35:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-10-15 01:35:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2019-10-15 01:35:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-10-15 01:35:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 153 transitions. [2019-10-15 01:35:27,732 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 153 transitions. Word has length 78 [2019-10-15 01:35:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:27,733 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 153 transitions. [2019-10-15 01:35:27,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 123 states. [2019-10-15 01:35:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 153 transitions. [2019-10-15 01:35:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 01:35:27,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:27,735 INFO L380 BasicCegarLoop]: trace histogram [110, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:27,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:27,940 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1073010925, now seen corresponding path program 8 times [2019-10-15 01:35:27,941 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:27,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894589089] [2019-10-15 01:35:27,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:27,942 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:27,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6183 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:32,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894589089] [2019-10-15 01:35:32,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123947141] [2019-10-15 01:35:32,713 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:36,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-15 01:35:36,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:36,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:35:36,163 INFO L279 TraceCheckSpWp]: Computing forward predicates...