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/xor2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:30:21,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:30:21,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:30:21,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:30:21,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:30:21,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:30:21,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:30:21,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:30:21,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:30:21,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:30:21,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:30:21,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:30:21,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:30:21,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:30:21,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:30:21,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:30:21,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:30:21,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:30:21,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:30:21,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:30:21,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:30:21,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:30:21,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:30:21,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:30:21,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:30:21,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:30:21,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:30:21,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:30:21,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:30:21,756 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:30:21,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:30:21,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:30:21,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:30:21,758 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:30:21,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:30:21,759 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:30:21,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:30:21,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:30:21,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:30:21,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:30:21,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:30:21,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:30:21,760 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:30:21,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:30:21,760 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:30:21,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:30:21,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:30:21,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:30:21,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:30:21,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:30:21,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:30:21,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:30:21,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:30:21,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:30:21,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:30:21,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:30:21,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:30:21,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:30:22,036 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:30:22,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:30:22,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:30:22,059 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:30:22,060 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:30:22,060 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor2.i [2019-10-15 01:30:22,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fff146f2/c6dbd5ca8b5e443088c8cd21df057601/FLAG564a6220d [2019-10-15 01:30:22,616 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:30:22,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor2.i [2019-10-15 01:30:22,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fff146f2/c6dbd5ca8b5e443088c8cd21df057601/FLAG564a6220d [2019-10-15 01:30:23,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fff146f2/c6dbd5ca8b5e443088c8cd21df057601 [2019-10-15 01:30:23,020 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:30:23,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:30:23,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:30:23,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:30:23,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:30:23,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35609722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23, skipping insertion in model container [2019-10-15 01:30:23,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,041 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:30:23,063 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:30:23,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:30:23,293 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:30:23,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:30:23,415 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:30:23,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23 WrapperNode [2019-10-15 01:30:23,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:30:23,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:30:23,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:30:23,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:30:23,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:30:23,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:30:23,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:30:23,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:30:23,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:30:23,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:30:23,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:30:23,511 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-10-15 01:30:23,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:30:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:30:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:30:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-10-15 01:30:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:30:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:30:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:30:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:30:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:30:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:30:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:30:23,892 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:30:23,892 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:30:23,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:30:23 BoogieIcfgContainer [2019-10-15 01:30:23,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:30:23,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:30:23,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:30:23,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:30:23,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:30:23" (1/3) ... [2019-10-15 01:30:23,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d18d62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:30:23, skipping insertion in model container [2019-10-15 01:30:23,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23" (2/3) ... [2019-10-15 01:30:23,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d18d62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:30:23, skipping insertion in model container [2019-10-15 01:30:23,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:30:23" (3/3) ... [2019-10-15 01:30:23,901 INFO L109 eAbstractionObserver]: Analyzing ICFG xor2.i [2019-10-15 01:30:23,911 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:30:23,919 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:30:23,930 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:30:23,953 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:30:23,953 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:30:23,953 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:30:23,953 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:30:23,953 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:30:23,954 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:30:23,954 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:30:23,954 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:30:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:30:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:30:23,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:23,975 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:23,976 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -809725829, now seen corresponding path program 1 times [2019-10-15 01:30:23,991 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:23,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895046275] [2019-10-15 01:30:23,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,992 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:30:24,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895046275] [2019-10-15 01:30:24,168 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:30:24,168 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:30:24,168 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81404189] [2019-10-15 01:30:24,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:24,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:24,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:24,191 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:30:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:24,227 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 01:30:24,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:24,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 01:30:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:24,238 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:30:24,238 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:30:24,242 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:30:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:30:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:30:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:30:24,281 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 01:30:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:24,282 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:30:24,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:30:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:30:24,285 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:24,285 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:24,285 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:24,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:24,286 INFO L82 PathProgramCache]: Analyzing trace with hash 994996090, now seen corresponding path program 1 times [2019-10-15 01:30:24,286 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:24,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615031517] [2019-10-15 01:30:24,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:30:24,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615031517] [2019-10-15 01:30:24,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223712904] [2019-10-15 01:30:24,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:24,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:30:24,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:30:24,513 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:30:24,553 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:30:24,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:30:24,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971547748] [2019-10-15 01:30:24,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:24,556 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:24,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:24,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:30:24,557 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:30:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:24,567 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 01:30:24,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:24,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 01:30:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:24,571 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:30:24,572 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:30:24,573 INFO L600 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 [2019-10-15 01:30:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:30:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:30:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:30:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:30:24,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 01:30:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:24,590 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:30:24,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:30:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:30:24,593 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:24,593 INFO L380 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] [2019-10-15 01:30:24,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:24,801 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash -421018474, now seen corresponding path program 1 times [2019-10-15 01:30:24,802 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:24,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711004195] [2019-10-15 01:30:24,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:24,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711004195] [2019-10-15 01:30:24,891 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:30:24,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:30:24,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617057007] [2019-10-15 01:30:24,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:24,893 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:24,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:24,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:24,893 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 01:30:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:24,908 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:30:24,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:24,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 01:30:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:24,909 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:30:24,909 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:30:24,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:30:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:30:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:30:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:30:24,916 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 01:30:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:24,918 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:30:24,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:30:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:30:24,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:24,920 INFO L380 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] [2019-10-15 01:30:24,920 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:24,920 INFO L82 PathProgramCache]: Analyzing trace with hash -661634715, now seen corresponding path program 1 times [2019-10-15 01:30:24,921 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:24,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569121110] [2019-10-15 01:30:24,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:25,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569121110] [2019-10-15 01:30:25,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520584248] [2019-10-15 01:30:25,005 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 [2019-10-15 01:30:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:25,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:25,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:25,111 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:25,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1482320474] [2019-10-15 01:30:25,200 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:25,200 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:25,211 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:25,216 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:25,217 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:25,334 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:27,525 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:27,561 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:27,566 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:27,948 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:27,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:30:27,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509389027] [2019-10-15 01:30:27,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:30:27,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:27,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:30:27,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:30:27,953 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 01:30:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:28,668 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 01:30:28,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:30:28,668 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 01:30:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:28,669 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:30:28,669 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:30:28,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:30:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:30:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:30:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:30:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 01:30:28,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 01:30:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:28,678 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 01:30:28,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:30:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 01:30:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:30:28,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:28,680 INFO L380 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] [2019-10-15 01:30:28,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:28,893 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash -139894362, now seen corresponding path program 2 times [2019-10-15 01:30:28,894 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:28,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084772664] [2019-10-15 01:30:28,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:28,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:28,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:28,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084772664] [2019-10-15 01:30:28,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064973012] [2019-10-15 01:30:28,971 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 [2019-10-15 01:30:29,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:30:29,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:29,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:29,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:30:29,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:30:29,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307442554] [2019-10-15 01:30:29,104 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:29,105 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:29,105 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:29,105 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:29,106 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:29,134 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:30,813 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:30,856 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:30,861 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:31,274 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:31,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 01:30:31,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932568615] [2019-10-15 01:30:31,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:30:31,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:31,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:30:31,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:30:31,278 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 01:30:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:32,167 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 01:30:32,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:30:32,167 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 01:30:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:32,168 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:30:32,169 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:30:32,170 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:30:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:30:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 01:30:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:30:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 01:30:32,178 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 01:30:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:32,178 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 01:30:32,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:30:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 01:30:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:30:32,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:32,180 INFO L380 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] [2019-10-15 01:30:32,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:32,385 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:32,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1028595953, now seen corresponding path program 3 times [2019-10-15 01:30:32,386 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:32,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709416255] [2019-10-15 01:30:32,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:32,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:32,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:32,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709416255] [2019-10-15 01:30:32,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514095362] [2019-10-15 01:30:32,556 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 [2019-10-15 01:30:32,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:32,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:32,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:30:32,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:32,707 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:32,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653364960] [2019-10-15 01:30:32,803 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:32,803 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:32,804 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:32,804 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:32,804 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:32,826 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:34,241 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:34,273 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:34,277 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:34,795 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:34,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:30:34,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196453423] [2019-10-15 01:30:34,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:30:34,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:30:34,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:30:34,799 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 01:30:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:35,879 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 01:30:35,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:30:35,879 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 01:30:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:35,880 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:30:35,880 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:30:35,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:30:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:30:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 01:30:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:30:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 01:30:35,889 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 01:30:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:35,890 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 01:30:35,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:30:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 01:30:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:30:35,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:35,891 INFO L380 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] [2019-10-15 01:30:36,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:36,096 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:36,096 INFO L82 PathProgramCache]: Analyzing trace with hash -500498258, now seen corresponding path program 4 times [2019-10-15 01:30:36,097 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:36,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975402269] [2019-10-15 01:30:36,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:36,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:36,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:36,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975402269] [2019-10-15 01:30:36,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660331216] [2019-10-15 01:30:36,248 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 [2019-10-15 01:30:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:36,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:30:36,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:36,406 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:36,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710075987] [2019-10-15 01:30:36,717 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:36,717 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:36,717 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:36,717 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:36,718 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:36,736 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:37,976 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:37,995 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:37,998 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:38,417 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:38,418 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:30:38,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746399189] [2019-10-15 01:30:38,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:30:38,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:38,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:30:38,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:30:38,422 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 01:30:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:39,924 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 01:30:39,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:30:39,924 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 01:30:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:39,925 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:30:39,925 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:30:39,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 01:30:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:30:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 01:30:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:30:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 01:30:39,937 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 01:30:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:39,937 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 01:30:39,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:30:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 01:30:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 01:30:39,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:39,938 INFO L380 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] [2019-10-15 01:30:40,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:40,143 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1795685774, now seen corresponding path program 5 times [2019-10-15 01:30:40,143 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:40,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9661030] [2019-10-15 01:30:40,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:40,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:40,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:40,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9661030] [2019-10-15 01:30:40,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272154735] [2019-10-15 01:30:40,630 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 [2019-10-15 01:30:40,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:30:40,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:40,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:40,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-10-15 01:30:40,844 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-10-15 01:30:40,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054768096] [2019-10-15 01:30:40,916 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:40,916 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:40,917 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:40,917 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:40,917 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:40,936 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:42,148 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:42,176 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:42,180 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:42,985 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:42,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 01:30:42,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562079368] [2019-10-15 01:30:42,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 01:30:42,987 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 01:30:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:30:42,988 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 01:30:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:46,965 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 01:30:46,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 01:30:46,965 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 01:30:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:46,966 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:30:46,966 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 01:30:46,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:30:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 01:30:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 01:30:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:30:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 01:30:46,977 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 01:30:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:46,978 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 01:30:46,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 01:30:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 01:30:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:30:46,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:46,979 INFO L380 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] [2019-10-15 01:30:47,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:47,193 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:47,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:47,194 INFO L82 PathProgramCache]: Analyzing trace with hash -344788902, now seen corresponding path program 6 times [2019-10-15 01:30:47,194 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:47,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874703997] [2019-10-15 01:30:47,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:47,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:47,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:47,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874703997] [2019-10-15 01:30:47,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052096609] [2019-10-15 01:30:47,627 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 [2019-10-15 01:30:47,834 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:47,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:47,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:30:47,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:47,858 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:48,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [856675463] [2019-10-15 01:30:48,957 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:48,958 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:48,958 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:48,959 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:48,959 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:48,973 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:50,334 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:50,355 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:50,358 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:50,877 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:50,877 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:30:50,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364945478] [2019-10-15 01:30:50,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-15 01:30:50,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:50,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-15 01:30:50,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=3090, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:30:50,882 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 70 states. [2019-10-15 01:30:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:54,317 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-15 01:30:54,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-15 01:30:54,317 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 67 [2019-10-15 01:30:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:54,318 INFO L225 Difference]: With dead ends: 104 [2019-10-15 01:30:54,319 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:30:54,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3929 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5099, Invalid=12723, Unknown=0, NotChecked=0, Total=17822 [2019-10-15 01:30:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:30:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-15 01:30:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:30:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-15 01:30:54,334 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-10-15 01:30:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:54,335 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-15 01:30:54,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-15 01:30:54,335 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-15 01:30:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 01:30:54,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:54,336 INFO L380 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] [2019-10-15 01:30:54,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:54,541 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash -303923653, now seen corresponding path program 7 times [2019-10-15 01:30:54,543 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:54,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464929329] [2019-10-15 01:30:54,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:54,544 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:54,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:55,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464929329] [2019-10-15 01:30:55,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009450229] [2019-10-15 01:30:55,906 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:56,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:30:56,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:56,204 INFO L321 TraceCheckSpWp]: Computing backward predicates...