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/xor3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:30:21,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:30:21,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:30:21,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:30:21,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:30:21,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:30:21,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:30:21,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:30:21,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:30:21,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:30:21,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:30:21,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:30:21,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:30:21,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:30:21,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:30:21,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:30:21,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:30:21,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:30:21,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:30:21,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:30:21,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:30:21,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:30:21,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:30:21,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:30:21,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:30:21,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:30:21,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:30:21,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:30:21,947 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 01:30:21,962 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:30:21,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:30:21,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:30:21,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:30:21,964 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:30:21,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:30:21,964 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:30:21,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:30:21,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:30:21,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:30:21,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:30:21,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:30:21,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:30:21,966 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:30:21,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:30:21,966 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:30:21,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:30:21,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:30:21,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:30:21,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:30:21,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:30:21,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:30:21,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:30:21,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:30:21,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:30:21,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:30:21,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:30:21,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:30:21,969 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 01:30:22,317 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:30:22,334 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:30:22,337 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:30:22,338 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:30:22,339 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:30:22,339 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor3.i [2019-10-15 01:30:22,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c781a435/0739a74bf017449791f7e3f770d6833f/FLAGa0489e503 [2019-10-15 01:30:22,784 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:30:22,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor3.i [2019-10-15 01:30:22,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c781a435/0739a74bf017449791f7e3f770d6833f/FLAGa0489e503 [2019-10-15 01:30:23,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c781a435/0739a74bf017449791f7e3f770d6833f [2019-10-15 01:30:23,180 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:30:23,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:30:23,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:30:23,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:30:23,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:30:23,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac258e7 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 01:30:23,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:30:23" (1/1) ... [2019-10-15 01:30:23,198 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:30:23,216 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:30:23,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:30:23,460 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:30:23,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:30:23,585 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:30:23,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:23 WrapperNode [2019-10-15 01:30:23,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:30:23,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:30:23,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:30:23,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:30:23,601 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 01:30:23,601 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 01:30:23,611 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 01:30:23,612 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 01:30:23,625 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 01:30:23,631 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 01:30:23,632 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 01:30:23,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:30:23,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:30:23,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:30:23,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:30:23,637 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 01:30:23,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:30:23,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:30:23,689 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-10-15 01:30:23,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:30:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:30:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:30:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-10-15 01:30:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:30:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:30:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:30:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:30:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:30:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:30:23,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:30:24,058 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:30:24,059 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:30:24,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:30:24 BoogieIcfgContainer [2019-10-15 01:30:24,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:30:24,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:30:24,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:30:24,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:30:24,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:30:23" (1/3) ... [2019-10-15 01:30:24,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fafed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:30:24, skipping insertion in model container [2019-10-15 01:30:24,065 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 01:30:24,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fafed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:30:24, skipping insertion in model container [2019-10-15 01:30:24,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:30:24" (3/3) ... [2019-10-15 01:30:24,068 INFO L109 eAbstractionObserver]: Analyzing ICFG xor3.i [2019-10-15 01:30:24,078 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:30:24,085 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:30:24,097 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:30:24,120 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:30:24,120 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:30:24,120 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:30:24,120 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:30:24,120 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:30:24,121 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:30:24,121 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:30:24,121 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:30:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:30:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:30:24,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:24,145 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 01:30:24,147 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:24,152 INFO L82 PathProgramCache]: Analyzing trace with hash -809725829, now seen corresponding path program 1 times [2019-10-15 01:30:24,160 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:24,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927159179] [2019-10-15 01:30:24,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:24,337 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 01:30:24,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927159179] [2019-10-15 01:30:24,339 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:30:24,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:30:24,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394503206] [2019-10-15 01:30:24,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:24,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:24,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:24,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:24,367 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:30:24,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:24,407 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 01:30:24,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:24,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 01:30:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:24,420 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:30:24,420 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:30:24,424 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 01:30:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:30:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:30:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:30:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:30:24,479 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 01:30:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:24,480 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:30:24,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:30:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:30:24,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:24,483 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 01:30:24,484 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:24,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash 994996090, now seen corresponding path program 1 times [2019-10-15 01:30:24,485 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:24,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818843909] [2019-10-15 01:30:24,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:24,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:24,576 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 01:30:24,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818843909] [2019-10-15 01:30:24,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62214616] [2019-10-15 01:30:24,577 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 01:30:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:24,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:30:24,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:24,730 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 01:30:24,732 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:24,785 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 01:30:24,786 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:30:24,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:30:24,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987653178] [2019-10-15 01:30:24,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:24,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:30:24,790 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:30:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:24,800 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 01:30:24,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:24,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 01:30:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:24,802 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:30:24,802 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:30:24,803 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 01:30:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:30:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:30:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:30:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:30:24,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 01:30:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:24,810 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:30:24,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:30:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:30:24,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:24,813 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 01:30:25,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:25,018 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:25,019 INFO L82 PathProgramCache]: Analyzing trace with hash -421018474, now seen corresponding path program 1 times [2019-10-15 01:30:25,019 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:25,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319020461] [2019-10-15 01:30:25,021 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:25,021 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:25,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:25,107 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 01:30:25,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319020461] [2019-10-15 01:30:25,107 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:30:25,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:30:25,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707250286] [2019-10-15 01:30:25,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:25,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:25,110 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 01:30:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:25,124 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:30:25,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:25,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 01:30:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:25,126 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:30:25,126 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:30:25,127 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 01:30:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:30:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:30:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:30:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:30:25,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 01:30:25,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:25,150 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:30:25,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:30:25,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:30:25,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:25,154 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 01:30:25,155 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash -661634715, now seen corresponding path program 1 times [2019-10-15 01:30:25,156 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:25,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344398315] [2019-10-15 01:30:25,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:25,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:25,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:25,299 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 01:30:25,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344398315] [2019-10-15 01:30:25,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786948808] [2019-10-15 01:30:25,300 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 01:30:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:25,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:25,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:25,389 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 01:30:25,390 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:25,461 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 01:30:25,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266381770] [2019-10-15 01:30:25,507 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:25,508 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:25,524 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:25,534 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:25,535 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:25,714 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:27,814 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:27,863 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:27,868 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:28,277 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:28,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:30:28,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893878310] [2019-10-15 01:30:28,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:30:28,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:28,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:30:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:30:28,282 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 01:30:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:28,905 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 01:30:28,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:30:28,906 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 01:30:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:28,907 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:30:28,907 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:30:28,908 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 01:30:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:30:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:30:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:30:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 01:30:28,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 01:30:28,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:28,916 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 01:30:28,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:30:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 01:30:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:30:28,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:28,917 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 01:30:29,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:29,125 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:29,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:29,125 INFO L82 PathProgramCache]: Analyzing trace with hash -139894362, now seen corresponding path program 2 times [2019-10-15 01:30:29,125 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:29,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480825618] [2019-10-15 01:30:29,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:29,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:29,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:29,195 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 01:30:29,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480825618] [2019-10-15 01:30:29,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372913620] [2019-10-15 01:30:29,196 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 01:30:29,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:30:29,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:29,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:29,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:29,298 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 01:30:29,298 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:29,331 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 01:30:29,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [198667775] [2019-10-15 01:30:29,337 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:29,337 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:29,338 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:29,338 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:29,338 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:29,367 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:31,026 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:31,052 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:31,056 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:31,437 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:31,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 01:30:31,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891909143] [2019-10-15 01:30:31,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:30:31,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:30:31,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:30:31,441 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 01:30:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:32,413 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 01:30:32,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:30:32,414 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 01:30:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:32,415 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:30:32,416 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:30:32,417 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 01:30:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:30:32,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 01:30:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:30:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 01:30:32,425 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 01:30:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:32,425 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 01:30:32,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:30:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 01:30:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:30:32,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:32,427 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 01:30:32,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:32,640 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:32,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1028595953, now seen corresponding path program 3 times [2019-10-15 01:30:32,640 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:32,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082994381] [2019-10-15 01:30:32,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:32,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:32,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:32,742 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 01:30:32,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082994381] [2019-10-15 01:30:32,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698141142] [2019-10-15 01:30:32,743 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 01:30:32,844 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:32,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:32,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:30:32,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:32,874 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 01:30:32,874 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:32,955 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 01:30:32,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602700115] [2019-10-15 01:30:32,957 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:32,957 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:32,957 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:32,958 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:32,958 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:32,980 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:34,767 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:34,799 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:34,803 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:37,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:37,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:30:37,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731435019] [2019-10-15 01:30:37,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:30:37,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:30:37,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=515, Unknown=1, NotChecked=0, Total=650 [2019-10-15 01:30:37,175 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 01:30:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:38,094 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 01:30:38,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:30:38,094 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 01:30:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:38,095 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:30:38,095 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:30:38,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=369, Invalid=1700, Unknown=1, NotChecked=0, Total=2070 [2019-10-15 01:30:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:30:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 01:30:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:30:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 01:30:38,105 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 01:30:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:38,105 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 01:30:38,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:30:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 01:30:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:30:38,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:38,107 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 01:30:38,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:38,315 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:38,315 INFO L82 PathProgramCache]: Analyzing trace with hash -500498258, now seen corresponding path program 4 times [2019-10-15 01:30:38,315 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:38,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520735554] [2019-10-15 01:30:38,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:38,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:38,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:38,465 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 01:30:38,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520735554] [2019-10-15 01:30:38,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924746350] [2019-10-15 01:30:38,466 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 01:30:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:38,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:30:38,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:38,614 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 01:30:38,615 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:38,980 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 01:30:38,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1174077484] [2019-10-15 01:30:38,984 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:38,985 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:38,986 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:38,986 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:38,987 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:39,015 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:40,529 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:40,548 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:40,551 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:40,922 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:40,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:30:40,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767808620] [2019-10-15 01:30:40,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:30:40,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:30:40,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:30:40,929 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 01:30:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:42,441 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 01:30:42,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:30:42,441 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 01:30:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:42,448 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:30:42,448 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:30:42,450 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 01:30:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:30:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 01:30:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:30:42,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 01:30:42,466 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 01:30:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:42,467 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 01:30:42,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:30:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 01:30:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 01:30:42,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:42,469 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 01:30:42,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:42,671 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:42,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1795685774, now seen corresponding path program 5 times [2019-10-15 01:30:42,672 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:42,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44932521] [2019-10-15 01:30:42,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:42,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:42,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:43,145 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 01:30:43,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44932521] [2019-10-15 01:30:43,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528686212] [2019-10-15 01:30:43,145 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 01:30:43,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:30:43,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:43,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:43,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:43,359 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 01:30:43,359 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:43,419 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 01:30:43,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510909585] [2019-10-15 01:30:43,421 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:43,421 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:43,421 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:43,422 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:43,422 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:43,441 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:44,746 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:44,767 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:44,769 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:45,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:45,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 01:30:45,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863983387] [2019-10-15 01:30:45,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 01:30:45,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:45,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 01:30:45,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:30:45,317 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 01:30:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:49,550 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 01:30:49,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 01:30:49,550 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 01:30:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:49,551 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:30:49,552 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 01:30:49,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1349, Invalid=5456, Unknown=1, NotChecked=0, Total=6806 [2019-10-15 01:30:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 01:30:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 01:30:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:30:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 01:30:49,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 01:30:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:49,564 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 01:30:49,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 01:30:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 01:30:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:30:49,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:49,565 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 01:30:49,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:49,769 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:49,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:49,770 INFO L82 PathProgramCache]: Analyzing trace with hash -344788902, now seen corresponding path program 6 times [2019-10-15 01:30:49,770 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:49,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413554281] [2019-10-15 01:30:49,771 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:49,771 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:49,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:50,182 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 01:30:50,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413554281] [2019-10-15 01:30:50,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84417494] [2019-10-15 01:30:50,182 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 01:30:50,393 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:50,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:50,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:30:50,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:50,414 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 01:30:50,415 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:51,393 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 01:30:51,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [514940347] [2019-10-15 01:30:51,395 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:51,395 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:51,396 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:51,396 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:51,396 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:51,423 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:52,596 INFO L199 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-10-15 01:30:52,619 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:52,622 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:53,213 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:53,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:30:53,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623170879] [2019-10-15 01:30:53,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-15 01:30:53,214 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:53,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-15 01:30:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=3090, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:30:53,220 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 70 states. [2019-10-15 01:30:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:56,693 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-15 01:30:56,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-15 01:30:56,694 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 67 [2019-10-15 01:30:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:56,695 INFO L225 Difference]: With dead ends: 104 [2019-10-15 01:30:56,695 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:30:56,699 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 01:30:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:30:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-15 01:30:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:30:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-15 01:30:56,710 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-10-15 01:30:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:56,711 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-15 01:30:56,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-15 01:30:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-15 01:30:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 01:30:56,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:56,713 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 01:30:56,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:56,923 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:56,924 INFO L82 PathProgramCache]: Analyzing trace with hash -303923653, now seen corresponding path program 7 times [2019-10-15 01:30:56,924 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:56,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897882459] [2019-10-15 01:30:56,925 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:56,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:56,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:58,410 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 01:30:58,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897882459] [2019-10-15 01:30:58,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923857765] [2019-10-15 01:30:58,411 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 01:30:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:58,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:30:58,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:58,732 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 01:30:58,733 INFO L321 TraceCheckSpWp]: Computing backward predicates...