/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/array-crafted/mapsum4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:17:44,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:17:44,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:17:44,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:17:44,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:17:44,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:17:44,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:17:44,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:17:44,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:17:44,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:17:44,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:17:44,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:17:44,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:17:44,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:17:44,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:17:44,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:17:44,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:17:44,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:17:44,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:17:44,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:17:44,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:17:44,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:17:44,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:17:44,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:17:44,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:17:44,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:17:44,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:17:44,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:17:44,060 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 01:17:44,074 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:17:44,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:17:44,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:17:44,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:17:44,076 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:17:44,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:17:44,077 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:17:44,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:17:44,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:17:44,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:17:44,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:17:44,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:17:44,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:17:44,078 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:17:44,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:17:44,080 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:17:44,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:17:44,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:17:44,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:17:44,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:17:44,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:17:44,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:17:44,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:17:44,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:17:44,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:17:44,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:17:44,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:17:44,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:17:44,083 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 01:17:44,419 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:17:44,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:17:44,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:17:44,450 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:17:44,450 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:17:44,451 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum4.i [2019-11-07 01:17:44,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a1c9c72/d4d244fa0cd948d79e86660647b2526f/FLAG16bc05bed [2019-11-07 01:17:44,907 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:17:44,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum4.i [2019-11-07 01:17:44,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a1c9c72/d4d244fa0cd948d79e86660647b2526f/FLAG16bc05bed [2019-11-07 01:17:45,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a1c9c72/d4d244fa0cd948d79e86660647b2526f [2019-11-07 01:17:45,381 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:17:45,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:17:45,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:17:45,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:17:45,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:17:45,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:45" (1/1) ... [2019-11-07 01:17:45,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175e7e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45, skipping insertion in model container [2019-11-07 01:17:45,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:45" (1/1) ... [2019-11-07 01:17:45,426 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:17:45,449 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:17:45,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:17:45,681 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:17:45,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:17:45,846 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:17:45,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45 WrapperNode [2019-11-07 01:17:45,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:17:45,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:17:45,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:17:45,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:17:45,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45" (1/1) ... [2019-11-07 01:17:45,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45" (1/1) ... [2019-11-07 01:17:45,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45" (1/1) ... [2019-11-07 01:17:45,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45" (1/1) ... [2019-11-07 01:17:45,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45" (1/1) ... [2019-11-07 01:17:45,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45" (1/1) ... [2019-11-07 01:17:45,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45" (1/1) ... [2019-11-07 01:17:45,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:17:45,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:17:45,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:17:45,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:17:45,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45" (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 01:17:45,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:17:45,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:17:45,945 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2019-11-07 01:17:45,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:17:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:17:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:17:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2019-11-07 01:17:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:17:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:17:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:17:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:17:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:17:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:17:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:17:46,352 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:17:46,352 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:17:46,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:46 BoogieIcfgContainer [2019-11-07 01:17:46,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:17:46,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:17:46,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:17:46,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:17:46,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:17:45" (1/3) ... [2019-11-07 01:17:46,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea5f5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:46, skipping insertion in model container [2019-11-07 01:17:46,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:45" (2/3) ... [2019-11-07 01:17:46,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea5f5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:46, skipping insertion in model container [2019-11-07 01:17:46,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:46" (3/3) ... [2019-11-07 01:17:46,367 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum4.i [2019-11-07 01:17:46,377 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:17:46,387 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:17:46,397 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:17:46,417 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:17:46,417 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:17:46,417 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:17:46,417 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:17:46,418 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:17:46,418 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:17:46,418 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:17:46,418 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:17:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 01:17:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 01:17:46,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:46,441 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:46,442 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:46,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2002379581, now seen corresponding path program 1 times [2019-11-07 01:17:46,453 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:46,454 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811725308] [2019-11-07 01:17:46,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 01:17:46,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811725308] [2019-11-07 01:17:46,619 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:17:46,620 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:17:46,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256265087] [2019-11-07 01:17:46,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:17:46,628 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:46,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:17:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:46,646 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 01:17:46,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:46,678 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-07 01:17:46,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:17:46,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-07 01:17:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:46,689 INFO L225 Difference]: With dead ends: 41 [2019-11-07 01:17:46,689 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:17:46,692 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 01:17:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:17:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:17:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:17:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-07 01:17:46,727 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-11-07 01:17:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:46,728 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-07 01:17:46,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:17:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-07 01:17:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:17:46,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:46,731 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:46,731 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1641553888, now seen corresponding path program 1 times [2019-11-07 01:17:46,732 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:46,732 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844407397] [2019-11-07 01:17:46,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:17:46,806 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844407397] [2019-11-07 01:17:46,806 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113425647] [2019-11-07 01:17:46,807 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 01:17:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:46,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:17:46,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:17:46,929 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:17:46,969 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:17:46,969 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 01:17:46,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654061521] [2019-11-07 01:17:46,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:17:46,972 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:17:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:17:46,973 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-07 01:17:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:46,982 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-07 01:17:46,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:17:46,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 01:17:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:46,984 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:17:46,984 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:17:46,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:17:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:17:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 01:17:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 01:17:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 01:17:46,991 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-11-07 01:17:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:46,993 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 01:17:46,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:17:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 01:17:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:17:46,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:46,996 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:47,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:47,202 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:47,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1715048104, now seen corresponding path program 1 times [2019-11-07 01:17:47,202 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:47,203 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510900748] [2019-11-07 01:17:47,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:47,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510900748] [2019-11-07 01:17:47,290 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:17:47,290 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:17:47,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510913294] [2019-11-07 01:17:47,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:17:47,291 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:17:47,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:47,292 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-07 01:17:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:47,307 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-07 01:17:47,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:17:47,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-07 01:17:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:47,309 INFO L225 Difference]: With dead ends: 31 [2019-11-07 01:17:47,309 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:17:47,310 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 01:17:47,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:17:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:17:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:17:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 01:17:47,319 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-11-07 01:17:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:47,321 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 01:17:47,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:17:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 01:17:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 01:17:47,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:47,324 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:47,324 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:47,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1273676679, now seen corresponding path program 1 times [2019-11-07 01:17:47,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:47,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433683886] [2019-11-07 01:17:47,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:47,424 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433683886] [2019-11-07 01:17:47,424 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793140026] [2019-11-07 01:17:47,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:17:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:47,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:17:47,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:47,522 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:47,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741962123] [2019-11-07 01:17:47,584 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:17:47,584 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:17:47,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:17:47,599 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:17:47,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:17:47,722 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:17:48,187 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-11-07 01:17:48,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:17:48,219 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:17:48,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:17:48,902 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 01:17:48,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276833558] [2019-11-07 01:17:48,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 01:17:48,905 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:48,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 01:17:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:17:48,906 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 21 states. [2019-11-07 01:17:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:51,943 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-07 01:17:51,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:17:51,945 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-11-07 01:17:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:51,947 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:17:51,947 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 01:17:51,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=170, Invalid=1089, Unknown=1, NotChecked=0, Total=1260 [2019-11-07 01:17:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 01:17:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-07 01:17:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 01:17:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-07 01:17:51,964 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-11-07 01:17:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:51,964 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-07 01:17:51,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 01:17:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-07 01:17:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:17:51,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:51,966 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:52,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:52,171 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:52,172 INFO L82 PathProgramCache]: Analyzing trace with hash 811678230, now seen corresponding path program 2 times [2019-11-07 01:17:52,173 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:52,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17514746] [2019-11-07 01:17:52,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:52,298 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17514746] [2019-11-07 01:17:52,298 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422526260] [2019-11-07 01:17:52,299 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 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 01:17:52,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:17:52,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:17:52,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:17:52,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:17:52,379 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:17:52,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1929707412] [2019-11-07 01:17:52,411 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:17:52,412 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:17:52,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:17:52,413 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:17:52,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:17:52,440 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:17:52,730 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-11-07 01:17:52,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:17:52,764 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:17:53,478 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:17:53,478 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 15] total 25 [2019-11-07 01:17:53,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436097484] [2019-11-07 01:17:53,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-07 01:17:53,480 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:53,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-07 01:17:53,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2019-11-07 01:17:53,481 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 25 states. [2019-11-07 01:17:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:56,759 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-07 01:17:56,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 01:17:56,760 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-07 01:17:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:56,761 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:17:56,761 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 01:17:56,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=247, Invalid=1733, Unknown=0, NotChecked=0, Total=1980 [2019-11-07 01:17:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 01:17:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-07 01:17:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:17:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-07 01:17:56,770 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-11-07 01:17:56,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:56,771 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-07 01:17:56,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-07 01:17:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-07 01:17:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 01:17:56,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:56,772 INFO L410 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:56,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:56,976 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:56,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2095262385, now seen corresponding path program 3 times [2019-11-07 01:17:56,978 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:56,978 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323428796] [2019-11-07 01:17:56,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:17:57,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323428796] [2019-11-07 01:17:57,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809874205] [2019-11-07 01:17:57,129 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 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 01:17:57,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:17:57,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:17:57,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:17:57,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:17:57,279 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:17:57,421 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2076084454] [2019-11-07 01:17:57,424 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:17:57,425 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:17:57,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:17:57,426 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:17:57,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:17:57,454 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:17:57,752 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-11-07 01:17:57,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:17:57,785 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:00,425 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:00,425 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 15] total 29 [2019-11-07 01:18:00,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622314317] [2019-11-07 01:18:00,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 01:18:00,427 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 01:18:00,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=666, Unknown=1, NotChecked=0, Total=812 [2019-11-07 01:18:00,428 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2019-11-07 01:18:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:02,234 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-11-07 01:18:02,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:18:02,235 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2019-11-07 01:18:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:02,236 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:18:02,236 INFO L226 Difference]: Without dead ends: 36 [2019-11-07 01:18:02,238 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=406, Invalid=2245, Unknown=1, NotChecked=0, Total=2652 [2019-11-07 01:18:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-07 01:18:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-07 01:18:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 01:18:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-07 01:18:02,246 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-11-07 01:18:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:02,246 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-07 01:18:02,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 01:18:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-07 01:18:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-07 01:18:02,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:02,248 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:02,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:02,451 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:02,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:02,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2049115666, now seen corresponding path program 4 times [2019-11-07 01:18:02,452 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:02,453 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038392888] [2019-11-07 01:18:02,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:02,722 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038392888] [2019-11-07 01:18:02,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857093513] [2019-11-07 01:18:02,723 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 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 [2019-11-07 01:18:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:02,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 01:18:02,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:02,823 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:03,126 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [847000054] [2019-11-07 01:18:03,127 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:03,128 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:03,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:03,128 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:03,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:03,148 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:03,439 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-11-07 01:18:03,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:03,456 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:05,752 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:05,753 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15] total 43 [2019-11-07 01:18:05,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397469893] [2019-11-07 01:18:05,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-07 01:18:05,754 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:05,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-07 01:18:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 01:18:05,755 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 43 states. [2019-11-07 01:18:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:10,992 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-11-07 01:18:10,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-07 01:18:10,992 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2019-11-07 01:18:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:10,993 INFO L225 Difference]: With dead ends: 68 [2019-11-07 01:18:10,994 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 01:18:10,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1281, Invalid=5038, Unknown=1, NotChecked=0, Total=6320 [2019-11-07 01:18:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 01:18:11,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-07 01:18:11,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-07 01:18:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-07 01:18:11,017 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-11-07 01:18:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:11,017 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-07 01:18:11,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-07 01:18:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-07 01:18:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-07 01:18:11,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:11,021 INFO L410 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:11,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:11,234 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:11,235 INFO L82 PathProgramCache]: Analyzing trace with hash -740285582, now seen corresponding path program 5 times [2019-11-07 01:18:11,235 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:11,235 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305965360] [2019-11-07 01:18:11,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:11,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305965360] [2019-11-07 01:18:11,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574272724] [2019-11-07 01:18:11,742 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 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 [2019-11-07 01:18:11,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:18:11,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:18:11,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:18:11,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-11-07 01:18:11,967 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-11-07 01:18:12,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109746551] [2019-11-07 01:18:12,026 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:12,027 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:12,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:12,028 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:12,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:12,050 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:12,319 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-11-07 01:18:12,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:12,350 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:14,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:14,363 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 15] total 47 [2019-11-07 01:18:14,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116830733] [2019-11-07 01:18:14,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-07 01:18:14,365 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:14,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-07 01:18:14,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=1702, Unknown=0, NotChecked=0, Total=2162 [2019-11-07 01:18:14,369 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 47 states. [2019-11-07 01:18:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:17,601 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-11-07 01:18:17,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-07 01:18:17,602 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 63 [2019-11-07 01:18:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:17,603 INFO L225 Difference]: With dead ends: 72 [2019-11-07 01:18:17,603 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 01:18:17,607 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1386, Invalid=6446, Unknown=0, NotChecked=0, Total=7832 [2019-11-07 01:18:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 01:18:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-07 01:18:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-07 01:18:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-07 01:18:17,615 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-11-07 01:18:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:17,616 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-07 01:18:17,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-07 01:18:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-07 01:18:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-07 01:18:17,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:17,617 INFO L410 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:17,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:17,822 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:17,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1983049792, now seen corresponding path program 6 times [2019-11-07 01:18:17,822 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:17,823 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549502372] [2019-11-07 01:18:17,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:18,358 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549502372] [2019-11-07 01:18:18,358 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737108185] [2019-11-07 01:18:18,358 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 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 [2019-11-07 01:18:18,475 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:18:18,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:18:18,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 01:18:18,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:18,495 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:19,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481424011] [2019-11-07 01:18:19,596 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:19,596 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:19,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:19,597 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:19,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:19,622 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:19,870 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-11-07 01:18:19,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:19,888 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:20,782 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:20,782 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 15] total 73 [2019-11-07 01:18:20,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551471531] [2019-11-07 01:18:20,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-11-07 01:18:20,784 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:20,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-11-07 01:18:20,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=3505, Unknown=0, NotChecked=0, Total=5256 [2019-11-07 01:18:20,786 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 73 states. [2019-11-07 01:18:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:28,063 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-11-07 01:18:28,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-07 01:18:28,063 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 67 [2019-11-07 01:18:28,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:28,064 INFO L225 Difference]: With dead ends: 104 [2019-11-07 01:18:28,064 INFO L226 Difference]: Without dead ends: 83 [2019-11-07 01:18:28,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4667 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=5136, Invalid=14323, Unknown=1, NotChecked=0, Total=19460 [2019-11-07 01:18:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-07 01:18:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-07 01:18:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:18:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-07 01:18:28,079 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-11-07 01:18:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:28,079 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-07 01:18:28,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-11-07 01:18:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-07 01:18:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 01:18:28,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:28,081 INFO L410 BasicCegarLoop]: trace histogram [56, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]