/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:58:37,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:58:37,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:58:37,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:58:37,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:58:37,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:58:37,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:58:37,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:58:37,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:58:37,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:58:37,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:58:37,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:58:37,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:58:37,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:58:37,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:58:37,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:58:37,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:58:37,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:58:37,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:58:37,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:58:37,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:58:37,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:58:37,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:58:37,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:58:37,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 03:58:37,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:58:37,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:58:37,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:58:37,082 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 [2019-11-07 03:58:37,103 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:58:37,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:58:37,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:58:37,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:58:37,106 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:58:37,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:58:37,106 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:58:37,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:58:37,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:58:37,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:58:37,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:58:37,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:58:37,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:58:37,109 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:58:37,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:58:37,109 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:58:37,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:58:37,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:58:37,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:58:37,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:58:37,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:58:37,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:58:37,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:58:37,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:58:37,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:58:37,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:58:37,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:58:37,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:58:37,112 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 [2019-11-07 03:58:37,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:58:37,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:58:37,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:58:37,429 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:58:37,429 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:58:37,430 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2019-11-07 03:58:37,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/679998098/5a2f420eb90c4b81bf1e075bf9f4e1b5/FLAG76e410d89 [2019-11-07 03:58:37,998 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:58:37,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2019-11-07 03:58:38,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/679998098/5a2f420eb90c4b81bf1e075bf9f4e1b5/FLAG76e410d89 [2019-11-07 03:58:38,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/679998098/5a2f420eb90c4b81bf1e075bf9f4e1b5 [2019-11-07 03:58:38,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:58:38,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:58:38,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:58:38,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:58:38,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:58:38,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:58:38" (1/1) ... [2019-11-07 03:58:38,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d7d8b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38, skipping insertion in model container [2019-11-07 03:58:38,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:58:38" (1/1) ... [2019-11-07 03:58:38,363 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:58:38,379 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:58:38,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:58:38,568 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:58:38,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:58:38,610 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:58:38,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38 WrapperNode [2019-11-07 03:58:38,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:58:38,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:58:38,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:58:38,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:58:38,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38" (1/1) ... [2019-11-07 03:58:38,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38" (1/1) ... [2019-11-07 03:58:38,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38" (1/1) ... [2019-11-07 03:58:38,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38" (1/1) ... [2019-11-07 03:58:38,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38" (1/1) ... [2019-11-07 03:58:38,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38" (1/1) ... [2019-11-07 03:58:38,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38" (1/1) ... [2019-11-07 03:58:38,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:58:38,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:58:38,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:58:38,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:58:38,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38" (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 [2019-11-07 03:58:38,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:58:38,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:58:38,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 03:58:38,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:58:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:58:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 03:58:38,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:58:38,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 03:58:38,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:58:38,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:58:38,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:58:38,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:58:38,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:58:39,062 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:58:39,062 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 03:58:39,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:58:39 BoogieIcfgContainer [2019-11-07 03:58:39,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:58:39,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:58:39,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:58:39,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:58:39,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:58:38" (1/3) ... [2019-11-07 03:58:39,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b8dd33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:58:39, skipping insertion in model container [2019-11-07 03:58:39,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:38" (2/3) ... [2019-11-07 03:58:39,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b8dd33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:58:39, skipping insertion in model container [2019-11-07 03:58:39,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:58:39" (3/3) ... [2019-11-07 03:58:39,074 INFO L109 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2019-11-07 03:58:39,087 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:58:39,100 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:58:39,119 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:58:39,150 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:58:39,151 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:58:39,151 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:58:39,151 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:58:39,151 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:58:39,151 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:58:39,152 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:58:39,152 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:58:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-07 03:58:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 03:58:39,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:39,180 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:39,183 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:39,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1959451811, now seen corresponding path program 1 times [2019-11-07 03:58:39,201 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:39,201 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860386792] [2019-11-07 03:58:39,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:39,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860386792] [2019-11-07 03:58:39,377 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:58:39,377 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:58:39,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135014981] [2019-11-07 03:58:39,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:58:39,386 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:58:39,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:58:39,408 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-07 03:58:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:39,463 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-07 03:58:39,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:58:39,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-07 03:58:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:39,477 INFO L225 Difference]: With dead ends: 29 [2019-11-07 03:58:39,478 INFO L226 Difference]: Without dead ends: 12 [2019-11-07 03:58:39,486 INFO L630 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 [2019-11-07 03:58:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-07 03:58:39,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-07 03:58:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-07 03:58:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-07 03:58:39,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-07 03:58:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:39,537 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-07 03:58:39,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:58:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-07 03:58:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 03:58:39,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:39,540 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:39,541 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:39,542 INFO L82 PathProgramCache]: Analyzing trace with hash 504932467, now seen corresponding path program 1 times [2019-11-07 03:58:39,542 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:39,542 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302022348] [2019-11-07 03:58:39,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:39,666 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302022348] [2019-11-07 03:58:39,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258879363] [2019-11-07 03:58:39,667 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 [2019-11-07 03:58:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:39,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 03:58:39,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:39,761 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:39,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757379113] [2019-11-07 03:58:39,815 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:58:39,815 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:39,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:39,833 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:39,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:40,021 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:58:40,283 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 03:58:40,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:58:40,298 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:58:40,676 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:58:40,676 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 9] total 16 [2019-11-07 03:58:40,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965376152] [2019-11-07 03:58:40,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-07 03:58:40,679 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:40,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-07 03:58:40,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-07 03:58:40,681 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 16 states. [2019-11-07 03:58:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:41,374 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-07 03:58:41,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 03:58:41,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 11 [2019-11-07 03:58:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:41,375 INFO L225 Difference]: With dead ends: 20 [2019-11-07 03:58:41,375 INFO L226 Difference]: Without dead ends: 15 [2019-11-07 03:58:41,377 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2019-11-07 03:58:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-07 03:58:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-07 03:58:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 03:58:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-07 03:58:41,384 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-11-07 03:58:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:41,385 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-07 03:58:41,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-07 03:58:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-07 03:58:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 03:58:41,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:41,386 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:41,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:41,599 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:41,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1070026915, now seen corresponding path program 2 times [2019-11-07 03:58:41,600 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:41,601 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894158213] [2019-11-07 03:58:41,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:41,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894158213] [2019-11-07 03:58:41,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026470129] [2019-11-07 03:58:41,711 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 [2019-11-07 03:58:41,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 03:58:41,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:58:41,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 03:58:41,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:41,787 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:41,861 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489847641] [2019-11-07 03:58:41,863 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:58:41,864 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:41,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:41,865 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:41,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:41,893 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:58:42,039 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 03:58:42,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:58:42,051 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:58:42,386 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:58:42,386 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 9] total 22 [2019-11-07 03:58:42,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379025827] [2019-11-07 03:58:42,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 03:58:42,388 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:42,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 03:58:42,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2019-11-07 03:58:42,389 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 22 states. [2019-11-07 03:58:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:43,473 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-07 03:58:43,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 03:58:43,473 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 14 [2019-11-07 03:58:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:43,474 INFO L225 Difference]: With dead ends: 26 [2019-11-07 03:58:43,475 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 03:58:43,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 03:58:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 03:58:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 03:58:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 03:58:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-07 03:58:43,482 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2019-11-07 03:58:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:43,483 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-07 03:58:43,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 03:58:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-07 03:58:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 03:58:43,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:43,484 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:43,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:43,694 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:43,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1928773981, now seen corresponding path program 3 times [2019-11-07 03:58:43,695 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:43,695 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100063180] [2019-11-07 03:58:43,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:43,865 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100063180] [2019-11-07 03:58:43,865 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145036002] [2019-11-07 03:58:43,865 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 [2019-11-07 03:58:43,931 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 03:58:43,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:58:43,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 03:58:43,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:43,973 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:44,234 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573432223] [2019-11-07 03:58:44,235 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:58:44,236 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:44,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:44,237 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:44,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:44,262 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:58:44,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 03:58:44,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:58:44,423 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:58:44,778 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:58:44,779 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 9] total 34 [2019-11-07 03:58:44,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200404701] [2019-11-07 03:58:44,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-07 03:58:44,780 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:44,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-07 03:58:44,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 03:58:44,782 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 34 states. [2019-11-07 03:58:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:46,725 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-11-07 03:58:46,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-07 03:58:46,725 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 20 [2019-11-07 03:58:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:46,726 INFO L225 Difference]: With dead ends: 38 [2019-11-07 03:58:46,726 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 03:58:46,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=966, Invalid=2816, Unknown=0, NotChecked=0, Total=3782 [2019-11-07 03:58:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 03:58:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-07 03:58:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 03:58:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-07 03:58:46,737 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2019-11-07 03:58:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:46,738 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-07 03:58:46,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-07 03:58:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-07 03:58:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 03:58:46,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:46,739 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:46,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:46,943 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:46,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1953340067, now seen corresponding path program 4 times [2019-11-07 03:58:46,944 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:46,947 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949791805] [2019-11-07 03:58:46,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:47,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949791805] [2019-11-07 03:58:47,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113616163] [2019-11-07 03:58:47,350 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 [2019-11-07 03:58:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:47,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 03:58:47,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:47,448 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:48,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595578405] [2019-11-07 03:58:48,260 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:58:48,260 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:48,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:48,261 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:48,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:48,300 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:58:48,385 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 03:58:48,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:58:48,395 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:58:49,166 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:58:49,167 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 9] total 58 [2019-11-07 03:58:49,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541865923] [2019-11-07 03:58:49,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-07 03:58:49,169 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:49,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-07 03:58:49,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2019-11-07 03:58:49,171 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 58 states. [2019-11-07 03:58:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:53,594 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2019-11-07 03:58:53,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-07 03:58:53,596 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 32 [2019-11-07 03:58:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:53,597 INFO L225 Difference]: With dead ends: 62 [2019-11-07 03:58:53,598 INFO L226 Difference]: Without dead ends: 57 [2019-11-07 03:58:53,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3594, Invalid=8396, Unknown=0, NotChecked=0, Total=11990 [2019-11-07 03:58:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-07 03:58:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-07 03:58:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-07 03:58:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-07 03:58:53,613 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2019-11-07 03:58:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:53,613 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-07 03:58:53,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-07 03:58:53,613 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-07 03:58:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-07 03:58:53,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:53,615 INFO L410 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:53,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:53,816 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash -751283549, now seen corresponding path program 5 times [2019-11-07 03:58:53,817 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:53,817 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775087860] [2019-11-07 03:58:53,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:54,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775087860] [2019-11-07 03:58:54,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473457156] [2019-11-07 03:58:54,846 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