/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/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:03:04,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:03:04,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:03:04,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:03:04,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:03:04,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:03:04,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:03:04,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:03:04,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:03:04,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:03:04,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:03:04,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:03:04,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:03:04,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:03:04,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:03:04,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:03:04,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:03:04,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:03:04,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:03:04,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:03:04,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:03:04,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:03:04,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:03:04,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:03:04,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:03:04,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:03:04,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:03:04,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:03:04,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 04:03:04,301 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:03:04,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:03:04,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:03:04,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:03:04,303 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:03:04,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:03:04,303 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:03:04,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:03:04,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:03:04,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:03:04,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:03:04,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:03:04,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:03:04,305 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:03:04,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:03:04,305 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:03:04,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:03:04,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:03:04,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:03:04,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:03:04,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:03:04,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:03:04,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:03:04,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:03:04,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:03:04,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:03:04,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:03:04,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:03:04,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:03:04,577 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:03:04,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:03:04,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:03:04,595 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:03:04,596 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:03:04,596 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2019-11-07 04:03:04,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e51488cc/761c8f13c68f4692843230b4724b9c38/FLAG6df647be5 [2019-11-07 04:03:05,109 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:03:05,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2019-11-07 04:03:05,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e51488cc/761c8f13c68f4692843230b4724b9c38/FLAG6df647be5 [2019-11-07 04:03:05,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e51488cc/761c8f13c68f4692843230b4724b9c38 [2019-11-07 04:03:05,556 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:03:05,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:03:05,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:03:05,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:03:05,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:03:05,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:03:05" (1/1) ... [2019-11-07 04:03:05,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a04251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05, skipping insertion in model container [2019-11-07 04:03:05,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:03:05" (1/1) ... [2019-11-07 04:03:05,595 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:03:05,615 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:03:05,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:03:05,829 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:03:05,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:03:05,861 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:03:05,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05 WrapperNode [2019-11-07 04:03:05,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:03:05,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:03:05,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:03:05,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:03:05,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05" (1/1) ... [2019-11-07 04:03:05,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05" (1/1) ... [2019-11-07 04:03:05,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05" (1/1) ... [2019-11-07 04:03:05,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05" (1/1) ... [2019-11-07 04:03:05,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05" (1/1) ... [2019-11-07 04:03:05,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05" (1/1) ... [2019-11-07 04:03:05,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05" (1/1) ... [2019-11-07 04:03:06,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:03:06,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:03:06,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:03:06,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:03:06,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:03:06,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:03:06,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:03:06,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 04:03:06,057 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-11-07 04:03:06,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:03:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:03:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:03:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:03:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-07 04:03:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-11-07 04:03:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:03:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:03:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:03:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:03:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:03:06,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:03:06,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:03:06,444 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:03:06,444 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 04:03:06,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:03:06 BoogieIcfgContainer [2019-11-07 04:03:06,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:03:06,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:03:06,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:03:06,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:03:06,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:03:05" (1/3) ... [2019-11-07 04:03:06,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed3a758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:03:06, skipping insertion in model container [2019-11-07 04:03:06,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:05" (2/3) ... [2019-11-07 04:03:06,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed3a758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:03:06, skipping insertion in model container [2019-11-07 04:03:06,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:03:06" (3/3) ... [2019-11-07 04:03:06,455 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2019-11-07 04:03:06,465 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:03:06,473 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:03:06,484 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:03:06,507 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:03:06,507 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:03:06,508 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:03:06,508 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:03:06,508 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:03:06,508 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:03:06,508 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:03:06,508 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:03:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-07 04:03:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 04:03:06,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:06,528 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:06,530 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:06,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1155056295, now seen corresponding path program 1 times [2019-11-07 04:03:06,542 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:06,542 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74964458] [2019-11-07 04:03:06,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:06,730 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74964458] [2019-11-07 04:03:06,731 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:03:06,732 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 04:03:06,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150194215] [2019-11-07 04:03:06,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 04:03:06,740 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:06,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 04:03:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 04:03:06,758 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-07 04:03:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:06,778 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-11-07 04:03:06,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 04:03:06,779 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-11-07 04:03:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:06,788 INFO L225 Difference]: With dead ends: 40 [2019-11-07 04:03:06,789 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 04:03:06,792 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 04:03:06,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 04:03:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 04:03:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 04:03:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-07 04:03:06,833 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-11-07 04:03:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:06,834 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-07 04:03:06,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 04:03:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-07 04:03:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 04:03:06,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:06,835 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:06,836 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:06,837 INFO L82 PathProgramCache]: Analyzing trace with hash -890265588, now seen corresponding path program 1 times [2019-11-07 04:03:06,837 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:06,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329062840] [2019-11-07 04:03:06,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:07,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329062840] [2019-11-07 04:03:07,142 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:03:07,142 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 04:03:07,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001170566] [2019-11-07 04:03:07,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:03:07,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:07,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:03:07,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:03:07,145 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2019-11-07 04:03:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:07,342 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-07 04:03:07,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 04:03:07,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-07 04:03:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:07,344 INFO L225 Difference]: With dead ends: 28 [2019-11-07 04:03:07,344 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 04:03:07,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:03:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 04:03:07,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 04:03:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 04:03:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-07 04:03:07,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2019-11-07 04:03:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:07,352 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-07 04:03:07,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:03:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-07 04:03:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 04:03:07,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:07,353 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:07,354 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash 831240490, now seen corresponding path program 1 times [2019-11-07 04:03:07,354 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:07,355 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902123430] [2019-11-07 04:03:07,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:07,621 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902123430] [2019-11-07 04:03:07,622 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462207092] [2019-11-07 04:03:07,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:07,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 04:03:07,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:07,828 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:08,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:03:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:08,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256571060] [2019-11-07 04:03:08,240 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 04:03:08,241 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:08,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:08,257 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:08,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:08,396 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 04:03:08,645 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2019-11-07 04:03:08,657 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 18 for LOIs [2019-11-07 04:03:08,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 04:03:08,834 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:11,665 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:03:11,666 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 13] total 30 [2019-11-07 04:03:11,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203151908] [2019-11-07 04:03:11,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-07 04:03:11,668 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-07 04:03:11,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=774, Unknown=1, NotChecked=0, Total=870 [2019-11-07 04:03:11,669 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 30 states. [2019-11-07 04:03:12,118 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2019-11-07 04:03:16,840 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-11-07 04:03:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:17,397 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-07 04:03:17,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 04:03:17,398 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 19 [2019-11-07 04:03:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:17,399 INFO L225 Difference]: With dead ends: 30 [2019-11-07 04:03:17,399 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 04:03:17,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=220, Invalid=1671, Unknown=1, NotChecked=0, Total=1892 [2019-11-07 04:03:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 04:03:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 04:03:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 04:03:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-07 04:03:17,408 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2019-11-07 04:03:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:17,408 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-07 04:03:17,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-07 04:03:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-07 04:03:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 04:03:17,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:17,409 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:17,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:17,610 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:17,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:17,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1636172488, now seen corresponding path program 2 times [2019-11-07 04:03:17,611 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:17,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914894449] [2019-11-07 04:03:17,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:18,087 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 27 [2019-11-07 04:03:18,315 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2019-11-07 04:03:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:18,622 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914894449] [2019-11-07 04:03:18,622 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934883057] [2019-11-07 04:03:18,622 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:18,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 04:03:18,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:03:18,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-07 04:03:18,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:18,873 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 04:03:18,883 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 04:03:18,986 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2019-11-07 04:03:21,709 WARN L191 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2019-11-07 04:03:23,414 WARN L191 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-11-07 04:03:23,724 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-11-07 04:03:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:23,745 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:24,087 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 70 [2019-11-07 04:03:24,299 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-11-07 04:03:25,193 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2019-11-07 04:03:32,279 WARN L191 SmtUtils]: Spent 4.58 s on a formula simplification that was a NOOP. DAG size: 82 [2019-11-07 04:03:32,313 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-11-07 04:03:32,321 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-11-07 04:03:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:32,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2091124983] [2019-11-07 04:03:32,357 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 04:03:32,357 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:32,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:32,358 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:32,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:32,411 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 04:03:32,564 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2019-11-07 04:03:32,570 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 18 for LOIs [2019-11-07 04:03:32,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 04:03:32,640 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:33,931 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:03:33,931 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12, 13] total 44 [2019-11-07 04:03:33,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501526484] [2019-11-07 04:03:33,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-07 04:03:33,934 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:33,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-07 04:03:33,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1741, Unknown=1, NotChecked=0, Total=1892 [2019-11-07 04:03:33,935 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 44 states. [2019-11-07 04:03:35,008 WARN L191 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-11-07 04:03:35,253 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2019-11-07 04:03:36,684 WARN L191 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2019-11-07 04:03:36,945 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2019-11-07 04:03:38,471 WARN L191 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2019-11-07 04:03:38,906 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2019-11-07 04:03:39,814 WARN L191 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2019-11-07 04:03:40,516 WARN L191 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2019-11-07 04:03:40,811 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-11-07 04:03:41,281 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-11-07 04:03:44,306 WARN L191 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2019-11-07 04:03:44,725 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2019-11-07 04:03:45,410 WARN L191 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2019-11-07 04:03:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:45,455 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-07 04:03:45,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-07 04:03:45,456 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 21 [2019-11-07 04:03:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:45,457 INFO L225 Difference]: With dead ends: 32 [2019-11-07 04:03:45,457 INFO L226 Difference]: Without dead ends: 24 [2019-11-07 04:03:45,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=378, Invalid=3403, Unknown=1, NotChecked=0, Total=3782 [2019-11-07 04:03:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-07 04:03:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-07 04:03:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 04:03:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-07 04:03:45,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2019-11-07 04:03:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:45,472 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-07 04:03:45,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-07 04:03:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-07 04:03:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 04:03:45,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:45,474 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:45,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:45,676 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:45,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2081709286, now seen corresponding path program 3 times [2019-11-07 04:03:45,677 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:45,677 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204868312] [2019-11-07 04:03:45,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:46,553 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 40 [2019-11-07 04:03:46,860 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 43 [2019-11-07 04:03:47,146 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2019-11-07 04:03:47,389 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2019-11-07 04:03:47,616 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2019-11-07 04:03:48,499 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2019-11-07 04:03:48,907 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 60 [2019-11-07 04:03:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:49,010 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204868312] [2019-11-07 04:03:49,010 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348005043] [2019-11-07 04:03:49,010 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:49,165 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:03:49,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:03:49,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-07 04:03:49,170 INFO L279 TraceCheckSpWp]: Computing forward predicates...