/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/reducercommutativity/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:39:45,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:39:45,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:39:45,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:39:45,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:39:45,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:39:45,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:39:45,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:39:45,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:39:45,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:39:45,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:39:45,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:39:45,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:39:45,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:39:45,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:39:45,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:39:45,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:39:45,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:39:45,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:39:45,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:39:45,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:39:45,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:39:45,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:39:45,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:39:45,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:39:45,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:39:45,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:39:45,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:39:45,659 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 04:39:45,682 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:39:45,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:39:45,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:39:45,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:39:45,687 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:39:45,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:39:45,687 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:39:45,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:39:45,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:39:45,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:39:45,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:39:45,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:39:45,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:39:45,689 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:39:45,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:39:45,689 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:39:45,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:39:45,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:39:45,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:39:45,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:39:45,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:39:45,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:39:45,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:39:45,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:39:45,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:39:45,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:39:45,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:39:45,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:39:45,697 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 04:39:45,960 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:39:45,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:39:45,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:39:45,976 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:39:45,976 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:39:45,977 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-11-07 04:39:46,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16c6287bf/66135f8b40d54f96a56d085b99b74d05/FLAG389f0aeb6 [2019-11-07 04:39:46,438 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:39:46,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-11-07 04:39:46,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16c6287bf/66135f8b40d54f96a56d085b99b74d05/FLAG389f0aeb6 [2019-11-07 04:39:46,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16c6287bf/66135f8b40d54f96a56d085b99b74d05 [2019-11-07 04:39:46,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:39:46,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:39:46,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:39:46,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:39:46,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:39:46,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:39:46" (1/1) ... [2019-11-07 04:39:46,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128aa138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:46, skipping insertion in model container [2019-11-07 04:39:46,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:39:46" (1/1) ... [2019-11-07 04:39:46,882 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:39:46,895 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:39:47,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:39:47,089 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:39:47,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:39:47,214 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:39:47,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47 WrapperNode [2019-11-07 04:39:47,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:39:47,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:39:47,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:39:47,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:39:47,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47" (1/1) ... [2019-11-07 04:39:47,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47" (1/1) ... [2019-11-07 04:39:47,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47" (1/1) ... [2019-11-07 04:39:47,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47" (1/1) ... [2019-11-07 04:39:47,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47" (1/1) ... [2019-11-07 04:39:47,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47" (1/1) ... [2019-11-07 04:39:47,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47" (1/1) ... [2019-11-07 04:39:47,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:39:47,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:39:47,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:39:47,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:39:47,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47" (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 04:39:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:39:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:39:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-11-07 04:39:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:39:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:39:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:39:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-11-07 04:39:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:39:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:39:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:39:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:39:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:39:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:39:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:39:47,707 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:39:47,707 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 04:39:47,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:39:47 BoogieIcfgContainer [2019-11-07 04:39:47,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:39:47,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:39:47,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:39:47,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:39:47,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:39:46" (1/3) ... [2019-11-07 04:39:47,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c92644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:39:47, skipping insertion in model container [2019-11-07 04:39:47,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:39:47" (2/3) ... [2019-11-07 04:39:47,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c92644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:39:47, skipping insertion in model container [2019-11-07 04:39:47,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:39:47" (3/3) ... [2019-11-07 04:39:47,715 INFO L109 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2019-11-07 04:39:47,723 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:39:47,728 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:39:47,738 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:39:47,759 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:39:47,759 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:39:47,759 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:39:47,760 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:39:47,760 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:39:47,760 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:39:47,760 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:39:47,760 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:39:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 04:39:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 04:39:47,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:47,782 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 04:39:47,784 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1553264816, now seen corresponding path program 1 times [2019-11-07 04:39:47,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:47,796 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274273831] [2019-11-07 04:39:47,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:47,971 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 04:39:47,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274273831] [2019-11-07 04:39:47,976 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:39:47,976 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:39:47,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422157933] [2019-11-07 04:39:47,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:39:47,983 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:47,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:39:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:39:47,997 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 04:39:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:48,036 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-07 04:39:48,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:39:48,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-07 04:39:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:48,045 INFO L225 Difference]: With dead ends: 41 [2019-11-07 04:39:48,046 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 04:39:48,049 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 04:39:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 04:39:48,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 04:39:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 04:39:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-07 04:39:48,090 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-11-07 04:39:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:48,091 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-07 04:39:48,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:39:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-07 04:39:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 04:39:48,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:48,094 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 04:39:48,094 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:48,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:48,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1274606805, now seen corresponding path program 1 times [2019-11-07 04:39:48,095 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:48,095 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695939446] [2019-11-07 04:39:48,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:48,171 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 04:39:48,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695939446] [2019-11-07 04:39:48,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113095230] [2019-11-07 04:39:48,173 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 04:39:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:48,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:39:48,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:39:48,300 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 04:39:48,300 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:39:48,352 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 04:39:48,352 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:39:48,352 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 04:39:48,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300699273] [2019-11-07 04:39:48,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:39:48,355 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:39:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:39:48,356 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-07 04:39:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:48,376 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-07 04:39:48,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:39:48,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 04:39:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:48,378 INFO L225 Difference]: With dead ends: 33 [2019-11-07 04:39:48,378 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 04:39:48,379 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 04:39:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 04:39:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 04:39:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 04:39:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 04:39:48,385 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-11-07 04:39:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:48,385 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 04:39:48,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:39:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 04:39:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 04:39:48,387 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:48,387 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 04:39:48,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:48,592 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:48,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash -544560989, now seen corresponding path program 1 times [2019-11-07 04:39:48,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:48,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719298573] [2019-11-07 04:39:48,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:48,721 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 04:39:48,721 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719298573] [2019-11-07 04:39:48,722 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:39:48,722 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:39:48,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514145161] [2019-11-07 04:39:48,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:39:48,723 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:39:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:39:48,725 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-07 04:39:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:48,740 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-07 04:39:48,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:39:48,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-07 04:39:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:48,748 INFO L225 Difference]: With dead ends: 31 [2019-11-07 04:39:48,748 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 04:39:48,749 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 04:39:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 04:39:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 04:39:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 04:39:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 04:39:48,755 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-11-07 04:39:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:48,759 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 04:39:48,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:39:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 04:39:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 04:39:48,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:48,761 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 04:39:48,761 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:48,761 INFO L82 PathProgramCache]: Analyzing trace with hash -5957836, now seen corresponding path program 1 times [2019-11-07 04:39:48,762 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:48,762 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174603412] [2019-11-07 04:39:48,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:48,888 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 04:39:48,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174603412] [2019-11-07 04:39:48,890 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093817996] [2019-11-07 04:39:48,890 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 04:39:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:48,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:39:48,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:39:48,986 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 04:39:48,987 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:39:49,023 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 04:39:49,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626522547] [2019-11-07 04:39:49,049 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:39:49,049 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:39:49,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:39:49,062 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:39:49,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:39:49,194 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:39:49,695 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:39:49,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:39:49,737 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:39:50,357 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:39:50,357 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 04:39:50,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5823279] [2019-11-07 04:39:50,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 04:39:50,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 04:39:50,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-07 04:39:50,364 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 21 states. [2019-11-07 04:39:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:51,283 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-07 04:39:51,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 04:39:51,284 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-11-07 04:39:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:51,285 INFO L225 Difference]: With dead ends: 40 [2019-11-07 04:39:51,286 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 04:39:51,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 04:39:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 04:39:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-07 04:39:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 04:39:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-07 04:39:51,294 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-11-07 04:39:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:51,295 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-07 04:39:51,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 04:39:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-07 04:39:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 04:39:51,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:51,296 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 04:39:51,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:51,500 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:51,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1961836647, now seen corresponding path program 2 times [2019-11-07 04:39:51,501 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:51,501 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725324092] [2019-11-07 04:39:51,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:39:51,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725324092] [2019-11-07 04:39:51,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510701759] [2019-11-07 04:39:51,572 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 04:39:51,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 04:39:51,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:39:51,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:39:51,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:39:51,672 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 04:39:51,672 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:39:51,706 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 04:39:51,706 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269617468] [2019-11-07 04:39:51,708 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:39:51,708 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:39:51,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:39:51,712 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:39:51,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:39:51,743 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:39:52,097 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:39:52,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:39:52,123 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:39:54,665 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:39:54,665 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 04:39:54,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424214062] [2019-11-07 04:39:54,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 04:39:54,667 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:54,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 04:39:54,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=357, Unknown=1, NotChecked=0, Total=420 [2019-11-07 04:39:54,668 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 21 states. [2019-11-07 04:39:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:39:57,571 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2019-11-07 04:39:57,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 04:39:57,571 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2019-11-07 04:39:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:39:57,572 INFO L225 Difference]: With dead ends: 42 [2019-11-07 04:39:57,573 INFO L226 Difference]: Without dead ends: 28 [2019-11-07 04:39:57,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=195, Invalid=1064, Unknown=1, NotChecked=0, Total=1260 [2019-11-07 04:39:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-07 04:39:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-07 04:39:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 04:39:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-07 04:39:57,586 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2019-11-07 04:39:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:39:57,587 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-07 04:39:57,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 04:39:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-07 04:39:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-07 04:39:57,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:39:57,593 INFO L410 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:39:57,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:39:57,797 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:39:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:39:57,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1430720737, now seen corresponding path program 3 times [2019-11-07 04:39:57,798 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:39:57,798 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824445015] [2019-11-07 04:39:57,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:39:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:39:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:39:58,021 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824445015] [2019-11-07 04:39:58,021 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288491288] [2019-11-07 04:39:58,022 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 04:39:58,112 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:39:58,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:39:58,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:39:58,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:39:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 04:39:58,186 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:39:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 04:39:58,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819943156] [2019-11-07 04:39:58,275 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:39:58,275 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:39:58,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:39:58,276 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:39:58,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:39:58,303 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:39:58,590 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:39:58,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:39:58,612 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:39:59,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:39:59,363 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 15] total 31 [2019-11-07 04:39:59,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352248082] [2019-11-07 04:39:59,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-07 04:39:59,365 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:39:59,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-07 04:39:59,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2019-11-07 04:39:59,366 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 31 states. [2019-11-07 04:40:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:04,924 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2019-11-07 04:40:04,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-07 04:40:04,925 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 41 [2019-11-07 04:40:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:04,926 INFO L225 Difference]: With dead ends: 53 [2019-11-07 04:40:04,926 INFO L226 Difference]: Without dead ends: 35 [2019-11-07 04:40:04,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=436, Invalid=2754, Unknown=2, NotChecked=0, Total=3192 [2019-11-07 04:40:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-07 04:40:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-07 04:40:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-07 04:40:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-07 04:40:04,936 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2019-11-07 04:40:04,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:04,937 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-07 04:40:04,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-07 04:40:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-07 04:40:04,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-07 04:40:04,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:04,939 INFO L410 BasicCegarLoop]: trace histogram [30, 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 04:40:05,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:05,143 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1473867866, now seen corresponding path program 4 times [2019-11-07 04:40:05,144 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:05,144 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616202462] [2019-11-07 04:40:05,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-07 04:40:05,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616202462] [2019-11-07 04:40:05,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80635281] [2019-11-07 04:40:05,327 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 04:40:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:05,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 04:40:05,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-07 04:40:05,448 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-07 04:40:05,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600649609] [2019-11-07 04:40:05,519 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:05,519 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:05,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:05,521 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:05,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:05,542 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:05,798 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:05,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:05,825 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:07,285 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:07,285 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 15] total 27 [2019-11-07 04:40:07,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932439822] [2019-11-07 04:40:07,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-07 04:40:07,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:07,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-07 04:40:07,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2019-11-07 04:40:07,288 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 27 states. [2019-11-07 04:40:10,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:10,354 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-11-07 04:40:10,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-07 04:40:10,355 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2019-11-07 04:40:10,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:10,356 INFO L225 Difference]: With dead ends: 64 [2019-11-07 04:40:10,356 INFO L226 Difference]: Without dead ends: 40 [2019-11-07 04:40:10,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=329, Invalid=1927, Unknown=0, NotChecked=0, Total=2256 [2019-11-07 04:40:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-07 04:40:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-07 04:40:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-07 04:40:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-11-07 04:40:10,367 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 60 [2019-11-07 04:40:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:10,367 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-11-07 04:40:10,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-07 04:40:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-11-07 04:40:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-07 04:40:10,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:10,369 INFO L410 BasicCegarLoop]: trace histogram [30, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:10,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:10,573 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:10,574 INFO L82 PathProgramCache]: Analyzing trace with hash -303721663, now seen corresponding path program 5 times [2019-11-07 04:40:10,574 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:10,574 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720084263] [2019-11-07 04:40:10,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-11-07 04:40:10,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720084263] [2019-11-07 04:40:10,888 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908070422] [2019-11-07 04:40:10,888 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 04:40:10,983 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 04:40:10,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:10,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:40:10,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 246 proven. 1 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-11-07 04:40:11,012 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-11-07 04:40:11,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465345715] [2019-11-07 04:40:11,037 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:11,037 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:11,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:11,039 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:11,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:11,059 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:11,289 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:11,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:11,303 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:13,807 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:13,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 04:40:13,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203087996] [2019-11-07 04:40:13,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 04:40:13,808 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:13,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 04:40:13,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=358, Unknown=1, NotChecked=0, Total=420 [2019-11-07 04:40:13,809 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 21 states. [2019-11-07 04:40:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:16,837 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2019-11-07 04:40:16,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 04:40:16,838 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2019-11-07 04:40:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:16,839 INFO L225 Difference]: With dead ends: 61 [2019-11-07 04:40:16,839 INFO L226 Difference]: Without dead ends: 43 [2019-11-07 04:40:16,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=178, Invalid=1080, Unknown=2, NotChecked=0, Total=1260 [2019-11-07 04:40:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-07 04:40:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-07 04:40:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-07 04:40:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-07 04:40:16,853 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 65 [2019-11-07 04:40:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:16,853 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-07 04:40:16,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 04:40:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-07 04:40:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-07 04:40:16,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:16,855 INFO L410 BasicCegarLoop]: trace histogram [30, 10, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:17,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:17,066 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1439118160, now seen corresponding path program 6 times [2019-11-07 04:40:17,067 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:17,067 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433631393] [2019-11-07 04:40:17,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-11-07 04:40:17,305 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433631393] [2019-11-07 04:40:17,305 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422143163] [2019-11-07 04:40:17,306 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 04:40:17,539 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:40:17,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:17,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:40:17,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 246 proven. 10 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-11-07 04:40:17,574 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-11-07 04:40:17,638 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590692694] [2019-11-07 04:40:17,640 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:17,640 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:17,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:17,641 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:17,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:17,664 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:17,894 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:17,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:17,911 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:18,411 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:18,412 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 15] total 26 [2019-11-07 04:40:18,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932996412] [2019-11-07 04:40:18,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 04:40:18,414 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:18,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 04:40:18,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2019-11-07 04:40:18,415 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 26 states. [2019-11-07 04:40:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:21,535 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2019-11-07 04:40:21,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 04:40:21,536 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2019-11-07 04:40:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:21,537 INFO L225 Difference]: With dead ends: 66 [2019-11-07 04:40:21,537 INFO L226 Difference]: Without dead ends: 48 [2019-11-07 04:40:21,538 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=313, Invalid=1756, Unknown=1, NotChecked=0, Total=2070 [2019-11-07 04:40:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-07 04:40:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-07 04:40:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-07 04:40:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-11-07 04:40:21,546 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 68 [2019-11-07 04:40:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:21,546 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-11-07 04:40:21,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-07 04:40:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-11-07 04:40:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-07 04:40:21,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:21,548 INFO L410 BasicCegarLoop]: trace histogram [30, 10, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:21,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:21,752 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1172269761, now seen corresponding path program 7 times [2019-11-07 04:40:21,753 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:21,753 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621235891] [2019-11-07 04:40:21,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY