/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-crafted/xor4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:17:49,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:17:49,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:17:49,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:17:49,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:17:49,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:17:49,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:17:49,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:17:49,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:17:49,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:17:49,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:17:49,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:17:49,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:17:49,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:17:49,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:17:49,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:17:49,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:17:49,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:17:49,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:17:49,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:17:49,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:17:49,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:17:49,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:17:49,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:17:49,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:17:49,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:17:49,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:17:49,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:17:49,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:17:49,558 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:17:49,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:17:49,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:17:49,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:17:49,560 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:17:49,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:17:49,561 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:17:49,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:17:49,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:17:49,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:17:49,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:17:49,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:17:49,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:17:49,564 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:17:49,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:17:49,564 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:17:49,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:17:49,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:17:49,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:17:49,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:17:49,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:17:49,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:17:49,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:17:49,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:17:49,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:17:49,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:17:49,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:17:49,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:17:49,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:17:49,919 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:17:49,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:17:49,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:17:49,946 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:17:49,947 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:17:49,947 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor4.i [2019-11-07 01:17:50,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b9377cfe/29879305edf149229ff3845a4616881c/FLAG08d28e4be [2019-11-07 01:17:50,498 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:17:50,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor4.i [2019-11-07 01:17:50,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b9377cfe/29879305edf149229ff3845a4616881c/FLAG08d28e4be [2019-11-07 01:17:50,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b9377cfe/29879305edf149229ff3845a4616881c [2019-11-07 01:17:50,920 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:17:50,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:17:50,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:17:50,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:17:50,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:17:50,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:50" (1/1) ... [2019-11-07 01:17:50,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28924ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:50, skipping insertion in model container [2019-11-07 01:17:50,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:50" (1/1) ... [2019-11-07 01:17:50,974 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:17:51,032 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:17:51,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:17:51,237 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:17:51,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:17:51,279 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:17:51,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51 WrapperNode [2019-11-07 01:17:51,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:17:51,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:17:51,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:17:51,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:17:51,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:17:51,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:17:51,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:17:51,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:17:51,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:17:51,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:17:51,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:17:51,464 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-11-07 01:17:51,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:17:51,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:17:51,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:17:51,464 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-11-07 01:17:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:17:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:17:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:17:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:17:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:17:51,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:17:51,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:17:51,864 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:17:51,864 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:17:51,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:51 BoogieIcfgContainer [2019-11-07 01:17:51,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:17:51,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:17:51,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:17:51,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:17:51,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:17:50" (1/3) ... [2019-11-07 01:17:51,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5163321f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:51, skipping insertion in model container [2019-11-07 01:17:51,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (2/3) ... [2019-11-07 01:17:51,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5163321f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:51, skipping insertion in model container [2019-11-07 01:17:51,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:51" (3/3) ... [2019-11-07 01:17:51,874 INFO L109 eAbstractionObserver]: Analyzing ICFG xor4.i [2019-11-07 01:17:51,882 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:17:51,888 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:17:51,897 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:17:51,917 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:17:51,917 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:17:51,918 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:17:51,918 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:17:51,918 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:17:51,918 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:17:51,918 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:17:51,918 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:17:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 01:17:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 01:17:51,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:51,943 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:51,944 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:51,950 INFO L82 PathProgramCache]: Analyzing trace with hash -809725829, now seen corresponding path program 1 times [2019-11-07 01:17:51,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:51,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878453524] [2019-11-07 01:17:51,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 01:17:52,145 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878453524] [2019-11-07 01:17:52,147 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:17:52,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:17:52,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735897422] [2019-11-07 01:17:52,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:17:52,157 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:52,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:17:52,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:52,171 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 01:17:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:52,203 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-07 01:17:52,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:17:52,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-07 01:17:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:52,215 INFO L225 Difference]: With dead ends: 41 [2019-11-07 01:17:52,215 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:17:52,219 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:17:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:17:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:17:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-07 01:17:52,260 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-11-07 01:17:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:52,261 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-07 01:17:52,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:17:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-07 01:17:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:17:52,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:52,264 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:52,264 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:52,265 INFO L82 PathProgramCache]: Analyzing trace with hash 994996090, now seen corresponding path program 1 times [2019-11-07 01:17:52,265 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:52,265 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697173249] [2019-11-07 01:17:52,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:17:52,353 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697173249] [2019-11-07 01:17:52,353 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955855107] [2019-11-07 01:17:52,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:17:52,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:17:52,504 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:17:52,543 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:17:52,543 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 01:17:52,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188353751] [2019-11-07 01:17:52,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:17:52,546 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:52,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:17:52,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:17:52,547 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-07 01:17:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:52,557 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-07 01:17:52,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:17:52,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 01:17:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:52,559 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:17:52,559 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:17:52,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:17:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:17:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 01:17:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 01:17:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 01:17:52,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-11-07 01:17:52,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:52,566 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 01:17:52,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:17:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 01:17:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:17:52,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:52,568 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:52,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:52,773 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash -421018474, now seen corresponding path program 1 times [2019-11-07 01:17:52,774 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:52,774 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379180532] [2019-11-07 01:17:52,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:52,885 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379180532] [2019-11-07 01:17:52,885 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:17:52,885 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:17:52,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108298245] [2019-11-07 01:17:52,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:17:52,887 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:52,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:17:52,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:52,888 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-07 01:17:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:52,912 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-07 01:17:52,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:17:52,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-07 01:17:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:52,914 INFO L225 Difference]: With dead ends: 31 [2019-11-07 01:17:52,915 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:17:52,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:17:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:17:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:17:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 01:17:52,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-11-07 01:17:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:52,924 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 01:17:52,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:17:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 01:17:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 01:17:52,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:52,926 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:52,927 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash -661634715, now seen corresponding path program 1 times [2019-11-07 01:17:52,927 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:52,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030141096] [2019-11-07 01:17:52,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:53,016 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030141096] [2019-11-07 01:17:53,016 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206591409] [2019-11-07 01:17:53,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:53,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:17:53,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:53,145 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:53,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990604302] [2019-11-07 01:17:53,213 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:17:53,214 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:17:53,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:17:53,226 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:17:53,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:17:53,347 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:17:53,926 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:17:53,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:17:53,958 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:17:54,681 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:17:54,681 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 01:17:54,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609950544] [2019-11-07 01:17:54,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 01:17:54,683 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 01:17:54,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:17:54,684 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 21 states. [2019-11-07 01:17:57,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:57,643 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-07 01:17:57,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:17:57,644 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-11-07 01:17:57,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:57,645 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:17:57,645 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 01:17:57,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=170, Invalid=1089, Unknown=1, NotChecked=0, Total=1260 [2019-11-07 01:17:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 01:17:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-07 01:17:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 01:17:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-07 01:17:57,654 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-11-07 01:17:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:57,654 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-07 01:17:57,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 01:17:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-07 01:17:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:17:57,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:57,656 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:57,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:57,859 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:57,860 INFO L82 PathProgramCache]: Analyzing trace with hash -139894362, now seen corresponding path program 2 times [2019-11-07 01:17:57,860 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:57,860 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377914358] [2019-11-07 01:17:57,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:57,977 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377914358] [2019-11-07 01:17:57,977 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524418358] [2019-11-07 01:17:57,977 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:58,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:17:58,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:17:58,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:17:58,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:17:58,054 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:17:58,111 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200167569] [2019-11-07 01:17:58,112 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:17:58,112 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:17:58,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:17:58,114 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:17:58,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:17:58,143 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:17:58,443 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:17:58,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:17:58,474 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:17:59,095 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:17:59,095 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 15] total 25 [2019-11-07 01:17:59,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674606236] [2019-11-07 01:17:59,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-07 01:17:59,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:59,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-07 01:17:59,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2019-11-07 01:17:59,098 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 25 states. [2019-11-07 01:18:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:02,551 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-07 01:18:02,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 01:18:02,552 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-07 01:18:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:02,553 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:18:02,554 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 01:18:02,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=247, Invalid=1733, Unknown=0, NotChecked=0, Total=1980 [2019-11-07 01:18:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 01:18:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-07 01:18:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:18:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-07 01:18:02,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-11-07 01:18:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:02,563 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-07 01:18:02,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-07 01:18:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-07 01:18:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 01:18:02,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:02,565 INFO L410 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:02,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:02,770 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1028595953, now seen corresponding path program 3 times [2019-11-07 01:18:02,771 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:02,771 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839874447] [2019-11-07 01:18:02,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:02,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839874447] [2019-11-07 01:18:02,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639931694] [2019-11-07 01:18:02,895 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:03,006 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:18:03,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:18:03,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:18:03,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:03,027 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:03,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864466626] [2019-11-07 01:18:03,148 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:03,148 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:03,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:03,148 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:03,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:03,170 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:03,416 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:18:03,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:03,436 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:04,134 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:04,134 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 15] total 29 [2019-11-07 01:18:04,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048804503] [2019-11-07 01:18:04,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 01:18:04,136 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:04,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 01:18:04,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2019-11-07 01:18:04,137 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2019-11-07 01:18:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:05,669 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-11-07 01:18:05,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:18:05,670 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2019-11-07 01:18:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:05,671 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:18:05,671 INFO L226 Difference]: Without dead ends: 36 [2019-11-07 01:18:05,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2019-11-07 01:18:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-07 01:18:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-07 01:18:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 01:18:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-07 01:18:05,681 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-11-07 01:18:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:05,681 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-07 01:18:05,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 01:18:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-07 01:18:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-07 01:18:05,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:05,683 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:05,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:05,887 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:05,888 INFO L82 PathProgramCache]: Analyzing trace with hash -500498258, now seen corresponding path program 4 times [2019-11-07 01:18:05,888 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:05,888 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659177889] [2019-11-07 01:18:05,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:06,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659177889] [2019-11-07 01:18:06,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787148389] [2019-11-07 01:18:06,085 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:06,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 01:18:06,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:06,200 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:06,491 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179655480] [2019-11-07 01:18:06,493 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:06,493 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:06,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:06,494 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:06,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:06,524 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:06,769 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:18:06,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:06,795 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:09,807 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:09,808 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15] total 43 [2019-11-07 01:18:09,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982675641] [2019-11-07 01:18:09,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-07 01:18:09,809 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:09,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-07 01:18:09,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=1359, Unknown=1, NotChecked=0, Total=1806 [2019-11-07 01:18:09,811 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 43 states. [2019-11-07 01:18:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:11,666 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-11-07 01:18:11,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-07 01:18:11,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2019-11-07 01:18:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:11,668 INFO L225 Difference]: With dead ends: 68 [2019-11-07 01:18:11,668 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 01:18:11,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1281, Invalid=5038, Unknown=1, NotChecked=0, Total=6320 [2019-11-07 01:18:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 01:18:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-07 01:18:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-07 01:18:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-07 01:18:11,680 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-11-07 01:18:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:11,681 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-07 01:18:11,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-07 01:18:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-07 01:18:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-07 01:18:11,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:11,683 INFO L410 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:11,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:11,897 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:11,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1795685774, now seen corresponding path program 5 times [2019-11-07 01:18:11,898 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:11,898 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060955817] [2019-11-07 01:18:11,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:12,448 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060955817] [2019-11-07 01:18:12,448 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635900988] [2019-11-07 01:18:12,448 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:12,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:18:12,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:18:12,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:18:12,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-11-07 01:18:12,586 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-11-07 01:18:12,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [765379045] [2019-11-07 01:18:12,638 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:12,638 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:12,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:12,639 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:12,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:12,657 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:12,867 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:18:12,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:12,881 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:13,907 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:13,907 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 15] total 47 [2019-11-07 01:18:13,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332709485] [2019-11-07 01:18:13,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-07 01:18:13,909 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:13,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-07 01:18:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=1702, Unknown=0, NotChecked=0, Total=2162 [2019-11-07 01:18:13,911 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 47 states. [2019-11-07 01:18:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:16,536 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-11-07 01:18:16,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-07 01:18:16,537 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 63 [2019-11-07 01:18:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:16,538 INFO L225 Difference]: With dead ends: 72 [2019-11-07 01:18:16,539 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 01:18:16,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1386, Invalid=6446, Unknown=0, NotChecked=0, Total=7832 [2019-11-07 01:18:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 01:18:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-07 01:18:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-07 01:18:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-07 01:18:16,551 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-11-07 01:18:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:16,551 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-07 01:18:16,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-07 01:18:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-07 01:18:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-07 01:18:16,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:16,553 INFO L410 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:16,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:16,756 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:16,756 INFO L82 PathProgramCache]: Analyzing trace with hash -344788902, now seen corresponding path program 6 times [2019-11-07 01:18:16,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:16,758 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510613467] [2019-11-07 01:18:16,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:17,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510613467] [2019-11-07 01:18:17,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067794398] [2019-11-07 01:18:17,320 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:17,439 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:18:17,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:18:17,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 01:18:17,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:17,470 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:18,466 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11707774] [2019-11-07 01:18:18,468 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:18,468 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:18,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:18,469 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:18,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:18,491 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:18,735 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:18:18,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:18,750 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:21,647 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:21,647 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 15] total 73 [2019-11-07 01:18:21,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096421472] [2019-11-07 01:18:21,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-11-07 01:18:21,649 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:21,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-11-07 01:18:21,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=3504, Unknown=1, NotChecked=0, Total=5256 [2019-11-07 01:18:21,652 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 73 states. [2019-11-07 01:18:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:25,705 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-11-07 01:18:25,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-07 01:18:25,706 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 67 [2019-11-07 01:18:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:25,707 INFO L225 Difference]: With dead ends: 104 [2019-11-07 01:18:25,707 INFO L226 Difference]: Without dead ends: 83 [2019-11-07 01:18:25,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4667 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=5136, Invalid=14323, Unknown=1, NotChecked=0, Total=19460 [2019-11-07 01:18:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-07 01:18:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-07 01:18:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:18:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-07 01:18:25,723 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-11-07 01:18:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:25,724 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-07 01:18:25,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-11-07 01:18:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-07 01:18:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 01:18:25,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:25,726 INFO L410 BasicCegarLoop]: trace histogram [56, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:25,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:25,928 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash -303923653, now seen corresponding path program 7 times [2019-11-07 01:18:25,929 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:25,929 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219863873] [2019-11-07 01:18:25,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:27,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219863873] [2019-11-07 01:18:27,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959201583] [2019-11-07 01:18:27,377 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 [2019-11-07 01:18:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:27,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-07 01:18:27,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:27,562 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:31,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783214983] [2019-11-07 01:18:31,378 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:31,379 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:31,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:31,380 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:31,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:31,404 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:31,653 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:18:31,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:31,669 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:33,994 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:33,995 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59, 15] total 131 [2019-11-07 01:18:33,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892199358] [2019-11-07 01:18:33,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 131 states [2019-11-07 01:18:33,997 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:33,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2019-11-07 01:18:34,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6826, Invalid=10204, Unknown=0, NotChecked=0, Total=17030 [2019-11-07 01:18:34,003 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 131 states.