/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-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:28:12,230 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:28:12,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:28:12,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:28:12,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:28:12,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:28:12,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:28:12,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:28:12,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:28:12,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:28:12,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:28:12,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:28:12,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:28:12,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:28:12,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:28:12,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:28:12,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:28:12,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:28:12,304 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 01:28:12,332 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:28:12,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:28:12,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:28:12,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:28:12,340 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:28:12,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:28:12,341 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:28:12,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:28:12,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:28:12,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:28:12,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:28:12,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:28:12,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:28:12,343 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:28:12,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:28:12,344 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:28:12,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:28:12,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:28:12,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:28:12,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:28:12,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:28:12,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:28:12,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:28:12,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:28:12,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:28:12,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:28:12,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:28:12,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:28:12,348 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 01:28:12,638 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:28:12,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:28:12,655 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:28:12,657 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:28:12,657 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:28:12,658 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-11-07 01:28:12,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243b10be8/5237dc44be064df99f95f4f625cc61dc/FLAG082b53d6d [2019-11-07 01:28:13,157 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:28:13,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-11-07 01:28:13,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243b10be8/5237dc44be064df99f95f4f625cc61dc/FLAG082b53d6d [2019-11-07 01:28:13,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243b10be8/5237dc44be064df99f95f4f625cc61dc [2019-11-07 01:28:13,528 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:28:13,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:28:13,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:13,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:28:13,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:28:13,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:13" (1/1) ... [2019-11-07 01:28:13,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6afdfcfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13, skipping insertion in model container [2019-11-07 01:28:13,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:13" (1/1) ... [2019-11-07 01:28:13,546 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:28:13,562 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:28:13,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:13,746 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:28:13,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:13,786 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:28:13,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13 WrapperNode [2019-11-07 01:28:13,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:13,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:28:13,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:28:13,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:28:13,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13" (1/1) ... [2019-11-07 01:28:13,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13" (1/1) ... [2019-11-07 01:28:13,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13" (1/1) ... [2019-11-07 01:28:13,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13" (1/1) ... [2019-11-07 01:28:13,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13" (1/1) ... [2019-11-07 01:28:13,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13" (1/1) ... [2019-11-07 01:28:13,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13" (1/1) ... [2019-11-07 01:28:13,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:28:13,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:28:13,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:28:13,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:28:13,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13" (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 01:28:13,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:28:13,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:28:13,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:28:13,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:28:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:28:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:28:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:28:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:28:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:28:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:28:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:28:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:28:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:28:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:28:14,384 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:28:14,384 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:28:14,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:14 BoogieIcfgContainer [2019-11-07 01:28:14,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:28:14,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:28:14,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:28:14,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:28:14,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:28:13" (1/3) ... [2019-11-07 01:28:14,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f25548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:14, skipping insertion in model container [2019-11-07 01:28:14,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:13" (2/3) ... [2019-11-07 01:28:14,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f25548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:14, skipping insertion in model container [2019-11-07 01:28:14,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:14" (3/3) ... [2019-11-07 01:28:14,393 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2019-11-07 01:28:14,402 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:28:14,409 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:28:14,421 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:28:14,445 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:28:14,446 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:28:14,446 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:28:14,446 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:28:14,446 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:28:14,446 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:28:14,446 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:28:14,447 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:28:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:28:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:28:14,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:14,469 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:14,470 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1264123479, now seen corresponding path program 1 times [2019-11-07 01:28:14,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:14,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746189130] [2019-11-07 01:28:14,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:14,658 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 01:28:14,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746189130] [2019-11-07 01:28:14,660 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:28:14,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:28:14,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980446453] [2019-11-07 01:28:14,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:28:14,667 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:14,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:28:14,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:28:14,686 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:28:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:14,773 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-07 01:28:14,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:28:14,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:28:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:14,786 INFO L225 Difference]: With dead ends: 38 [2019-11-07 01:28:14,786 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:28:14,791 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 01:28:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:28:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-07 01:28:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:28:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-07 01:28:14,835 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2019-11-07 01:28:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:14,836 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-07 01:28:14,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:28:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-07 01:28:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:28:14,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:14,837 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:14,838 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:14,839 INFO L82 PathProgramCache]: Analyzing trace with hash -392956526, now seen corresponding path program 1 times [2019-11-07 01:28:14,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:14,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463141561] [2019-11-07 01:28:14,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:28:14,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463141561] [2019-11-07 01:28:14,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803816172] [2019-11-07 01:28:14,930 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 01:28:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:14,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:28:15,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:28:15,034 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:28:15,066 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923516397] [2019-11-07 01:28:15,092 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:28:15,092 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:15,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:15,106 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:15,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:15,262 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:15,316 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:15,352 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:15,465 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2019-11-07 01:28:15,513 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:15,718 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:15,730 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:15,741 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:15,805 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:15,814 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:15,873 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:16,228 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:16,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:16,255 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:16,833 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:16,833 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:28:16,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355583811] [2019-11-07 01:28:16,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:28:16,836 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:16,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:28:16,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:28:16,837 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 18 states. [2019-11-07 01:28:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:17,799 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-07 01:28:17,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:28:17,800 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-11-07 01:28:17,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:17,801 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:28:17,801 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:28:17,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2019-11-07 01:28:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:28:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-07 01:28:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:28:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-07 01:28:17,810 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2019-11-07 01:28:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:17,811 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-07 01:28:17,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:28:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-07 01:28:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 01:28:17,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:17,812 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:18,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:18,015 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash -127994615, now seen corresponding path program 2 times [2019-11-07 01:28:18,017 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:18,017 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243708284] [2019-11-07 01:28:18,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:28:18,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243708284] [2019-11-07 01:28:18,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147289524] [2019-11-07 01:28:18,152 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 01:28:18,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:28:18,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:28:18,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:28:18,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:28:18,267 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:28:18,335 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193231086] [2019-11-07 01:28:18,339 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:28:18,340 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:18,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:18,341 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:18,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:18,389 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:18,450 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,468 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,485 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,502 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,578 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,591 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,760 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,769 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,776 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,832 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:18,863 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:19,062 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:19,192 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:19,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:19,203 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:19,763 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:19,764 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7, 11] total 24 [2019-11-07 01:28:19,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827935094] [2019-11-07 01:28:19,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:28:19,765 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:28:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:28:19,766 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 24 states. [2019-11-07 01:28:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:21,260 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2019-11-07 01:28:21,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:28:21,261 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2019-11-07 01:28:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:21,263 INFO L225 Difference]: With dead ends: 71 [2019-11-07 01:28:21,263 INFO L226 Difference]: Without dead ends: 55 [2019-11-07 01:28:21,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=364, Invalid=1276, Unknown=0, NotChecked=0, Total=1640 [2019-11-07 01:28:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-07 01:28:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2019-11-07 01:28:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-07 01:28:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-07 01:28:21,276 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2019-11-07 01:28:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:21,276 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-07 01:28:21,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:28:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-07 01:28:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-07 01:28:21,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:21,278 INFO L410 BasicCegarLoop]: trace histogram [10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:21,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:21,482 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash 701320466, now seen corresponding path program 3 times [2019-11-07 01:28:21,484 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:21,484 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495810113] [2019-11-07 01:28:21,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:28:21,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495810113] [2019-11-07 01:28:21,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384147529] [2019-11-07 01:28:21,626 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 01:28:21,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:28:21,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:28:21,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:28:21,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:28:21,705 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:28:21,777 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063483054] [2019-11-07 01:28:21,778 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:28:21,779 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:21,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:21,780 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:21,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:21,801 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:21,822 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:21,845 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:21,906 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:21,917 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:21,928 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:21,937 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:22,028 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:22,047 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:22,083 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:22,091 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:22,097 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:22,114 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:22,359 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:22,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:22,372 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:22,922 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:22,922 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 26 [2019-11-07 01:28:22,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147102852] [2019-11-07 01:28:22,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 01:28:22,923 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:22,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 01:28:22,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2019-11-07 01:28:22,927 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 26 states. [2019-11-07 01:28:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:24,949 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2019-11-07 01:28:24,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 01:28:24,950 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2019-11-07 01:28:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:24,951 INFO L225 Difference]: With dead ends: 92 [2019-11-07 01:28:24,952 INFO L226 Difference]: Without dead ends: 67 [2019-11-07 01:28:24,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=455, Invalid=1615, Unknown=0, NotChecked=0, Total=2070 [2019-11-07 01:28:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-07 01:28:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-07 01:28:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-07 01:28:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-11-07 01:28:24,966 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 37 [2019-11-07 01:28:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:24,966 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-11-07 01:28:24,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-07 01:28:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-11-07 01:28:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-07 01:28:24,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:24,969 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:25,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:25,175 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:25,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1216881623, now seen corresponding path program 4 times [2019-11-07 01:28:25,176 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:25,177 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630864550] [2019-11-07 01:28:25,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-07 01:28:25,432 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630864550] [2019-11-07 01:28:25,432 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355201279] [2019-11-07 01:28:25,432 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 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 01:28:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:25,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-07 01:28:25,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-07 01:28:25,548 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-07 01:28:25,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599433498] [2019-11-07 01:28:25,810 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:28:25,810 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:25,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:25,811 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:25,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:25,828 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:25,859 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:25,868 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:25,876 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:25,886 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:25,927 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:25,934 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:26,010 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:26,019 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:26,038 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:26,060 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:26,093 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:26,292 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:26,404 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:26,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:26,412 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:27,124 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:27,124 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 11] total 42 [2019-11-07 01:28:27,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611145270] [2019-11-07 01:28:27,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-07 01:28:27,126 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:27,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-07 01:28:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=1208, Unknown=0, NotChecked=0, Total=1722 [2019-11-07 01:28:27,127 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 42 states. [2019-11-07 01:28:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:31,281 INFO L93 Difference]: Finished difference Result 173 states and 206 transitions. [2019-11-07 01:28:31,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-07 01:28:31,281 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 61 [2019-11-07 01:28:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:31,283 INFO L225 Difference]: With dead ends: 173 [2019-11-07 01:28:31,283 INFO L226 Difference]: Without dead ends: 127 [2019-11-07 01:28:31,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1606, Invalid=4246, Unknown=0, NotChecked=0, Total=5852 [2019-11-07 01:28:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-07 01:28:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 86. [2019-11-07 01:28:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-07 01:28:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-11-07 01:28:31,319 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 61 [2019-11-07 01:28:31,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:31,320 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-11-07 01:28:31,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-07 01:28:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-11-07 01:28:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-07 01:28:31,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:31,325 INFO L410 BasicCegarLoop]: trace histogram [28, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:31,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:31,530 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:31,532 INFO L82 PathProgramCache]: Analyzing trace with hash -578813623, now seen corresponding path program 5 times [2019-11-07 01:28:31,532 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:31,532 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293927766] [2019-11-07 01:28:31,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-07 01:28:31,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293927766] [2019-11-07 01:28:31,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986573525] [2019-11-07 01:28:31,944 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 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