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/loop-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:01:59,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:01:59,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:01:59,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:01:59,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:01:59,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:01:59,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:01:59,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:01:59,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:01:59,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:01:59,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:01:59,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:01:59,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:01:59,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:01:59,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:01:59,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:01:59,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:01:59,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:01:59,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:01:59,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:01:59,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:01:59,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:01:59,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:01:59,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:01:59,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:01:59,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:01:59,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:01:59,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:01:59,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:01:59,110 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:01:59,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:01:59,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:01:59,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:01:59,112 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:01:59,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:01:59,113 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:01:59,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:01:59,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:01:59,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:01:59,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:01:59,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:01:59,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:01:59,114 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:01:59,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:01:59,114 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:01:59,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:01:59,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:01:59,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:01:59,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:01:59,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:01:59,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:01:59,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:01:59,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:01:59,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:01:59,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:01:59,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:01:59,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:01:59,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:01:59,395 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:01:59,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:01:59,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:01:59,413 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:01:59,413 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:01:59,414 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2019-10-15 03:01:59,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861b61962/c4cd4b15844946569972fe1ea6bad45b/FLAGd2e7b6369 [2019-10-15 03:01:59,926 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:01:59,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2019-10-15 03:01:59,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861b61962/c4cd4b15844946569972fe1ea6bad45b/FLAGd2e7b6369 [2019-10-15 03:02:00,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861b61962/c4cd4b15844946569972fe1ea6bad45b [2019-10-15 03:02:00,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:02:00,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:02:00,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:02:00,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:02:00,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:02:00,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:02:00" (1/1) ... [2019-10-15 03:02:00,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663c421b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00, skipping insertion in model container [2019-10-15 03:02:00,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:02:00" (1/1) ... [2019-10-15 03:02:00,367 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:02:00,385 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:02:00,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:02:00,612 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:02:00,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:02:00,659 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:02:00,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00 WrapperNode [2019-10-15 03:02:00,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:02:00,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:02:00,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:02:00,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:02:00,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00" (1/1) ... [2019-10-15 03:02:00,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00" (1/1) ... [2019-10-15 03:02:00,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00" (1/1) ... [2019-10-15 03:02:00,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00" (1/1) ... [2019-10-15 03:02:00,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00" (1/1) ... [2019-10-15 03:02:00,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00" (1/1) ... [2019-10-15 03:02:00,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00" (1/1) ... [2019-10-15 03:02:00,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:02:00,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:02:00,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:02:00,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:02:00,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:02:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:02:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:02:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:02:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:02:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:02:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:02:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:02:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:02:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:02:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:02:01,313 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:02:01,314 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 03:02:01,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:02:01 BoogieIcfgContainer [2019-10-15 03:02:01,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:02:01,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:02:01,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:02:01,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:02:01,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:02:00" (1/3) ... [2019-10-15 03:02:01,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d9f4b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:02:01, skipping insertion in model container [2019-10-15 03:02:01,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:00" (2/3) ... [2019-10-15 03:02:01,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d9f4b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:02:01, skipping insertion in model container [2019-10-15 03:02:01,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:02:01" (3/3) ... [2019-10-15 03:02:01,333 INFO L109 eAbstractionObserver]: Analyzing ICFG nested-3.c [2019-10-15 03:02:01,353 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:02:01,364 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:02:01,376 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:02:01,409 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:02:01,409 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:02:01,410 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:02:01,410 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:02:01,411 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:02:01,411 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:02:01,411 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:02:01,411 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:02:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 03:02:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:02:01,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:01,438 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:01,440 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash 254027471, now seen corresponding path program 1 times [2019-10-15 03:02:01,457 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:01,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403291028] [2019-10-15 03:02:01,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:01,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:01,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:01,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403291028] [2019-10-15 03:02:01,612 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:02:01,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:02:01,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726763582] [2019-10-15 03:02:01,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:02:01,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:01,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:02:01,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:02:01,633 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-15 03:02:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:01,700 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-10-15 03:02:01,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:02:01,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 03:02:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:01,710 INFO L225 Difference]: With dead ends: 28 [2019-10-15 03:02:01,711 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 03:02:01,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:02:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 03:02:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-15 03:02:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:02:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-15 03:02:01,757 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2019-10-15 03:02:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:01,757 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-15 03:02:01,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:02:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-15 03:02:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:02:01,759 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:01,759 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:01,759 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:01,760 INFO L82 PathProgramCache]: Analyzing trace with hash -875331670, now seen corresponding path program 1 times [2019-10-15 03:02:01,760 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:01,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557975981] [2019-10-15 03:02:01,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:01,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:01,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:01,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557975981] [2019-10-15 03:02:01,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97970053] [2019-10-15 03:02:01,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:01,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:02:01,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:01,889 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:01,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618147173] [2019-10-15 03:02:01,971 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:01,971 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:01,978 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:01,987 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:01,988 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:02,116 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 6 for LOIs [2019-10-15 03:02:02,421 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 7 iterations. Over-approximation may be very coarse. [2019-10-15 03:02:02,458 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-15 03:02:02,560 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 3 for LOIs [2019-10-15 03:02:02,565 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:03,087 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:03,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 9] total 15 [2019-10-15 03:02:03,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857844869] [2019-10-15 03:02:03,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-15 03:02:03,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:03,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-15 03:02:03,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-10-15 03:02:03,095 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 15 states. [2019-10-15 03:02:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:03,467 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-10-15 03:02:03,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 03:02:03,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2019-10-15 03:02:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:03,470 INFO L225 Difference]: With dead ends: 42 [2019-10-15 03:02:03,470 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 03:02:03,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:02:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 03:02:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-10-15 03:02:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 03:02:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-15 03:02:03,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2019-10-15 03:02:03,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:03,486 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-15 03:02:03,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-15 03:02:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-15 03:02:03,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 03:02:03,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:03,490 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:03,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:03,697 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1822492047, now seen corresponding path program 2 times [2019-10-15 03:02:03,698 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:03,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513763832] [2019-10-15 03:02:03,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:03,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:03,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:03,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513763832] [2019-10-15 03:02:03,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849966882] [2019-10-15 03:02:03,780 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 [2019-10-15 03:02:03,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:02:03,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:03,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:02:03,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:03,833 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:03,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [192670675] [2019-10-15 03:02:03,922 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:03,922 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:03,923 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:03,923 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:03,923 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:03,942 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 6 for LOIs [2019-10-15 03:02:04,098 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 7 iterations. Over-approximation may be very coarse. [2019-10-15 03:02:04,123 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2019-10-15 03:02:04,154 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 3 for LOIs [2019-10-15 03:02:04,158 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:04,552 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:04,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 9] total 21 [2019-10-15 03:02:04,552 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872253433] [2019-10-15 03:02:04,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 03:02:04,553 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:04,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 03:02:04,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2019-10-15 03:02:04,555 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 21 states. [2019-10-15 03:02:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:05,086 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2019-10-15 03:02:05,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 03:02:05,086 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 15 [2019-10-15 03:02:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:05,087 INFO L225 Difference]: With dead ends: 57 [2019-10-15 03:02:05,088 INFO L226 Difference]: Without dead ends: 44 [2019-10-15 03:02:05,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 03:02:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-15 03:02:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 24. [2019-10-15 03:02:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 03:02:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-15 03:02:05,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2019-10-15 03:02:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:05,096 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-15 03:02:05,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 03:02:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-15 03:02:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 03:02:05,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:05,098 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:05,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:05,307 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:05,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:05,308 INFO L82 PathProgramCache]: Analyzing trace with hash 995770287, now seen corresponding path program 3 times [2019-10-15 03:02:05,308 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:05,309 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921022915] [2019-10-15 03:02:05,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:05,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:05,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:05,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921022915] [2019-10-15 03:02:05,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335372287] [2019-10-15 03:02:05,440 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 [2019-10-15 03:02:05,486 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:02:05,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:05,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 03:02:05,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:05,496 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:05,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037496659] [2019-10-15 03:02:05,719 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:05,720 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:05,720 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:05,720 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:05,721 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:05,742 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 6 for LOIs [2019-10-15 03:02:05,911 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 7 iterations. Over-approximation may be very coarse. [2019-10-15 03:02:05,933 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2019-10-15 03:02:05,974 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 3 for LOIs [2019-10-15 03:02:05,984 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:06,346 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:06,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 9] total 33 [2019-10-15 03:02:06,347 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707356698] [2019-10-15 03:02:06,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-15 03:02:06,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-15 03:02:06,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 03:02:06,349 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 33 states. [2019-10-15 03:02:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:07,449 INFO L93 Difference]: Finished difference Result 87 states and 114 transitions. [2019-10-15 03:02:07,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-15 03:02:07,449 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 21 [2019-10-15 03:02:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:07,451 INFO L225 Difference]: With dead ends: 87 [2019-10-15 03:02:07,451 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 03:02:07,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=912, Invalid=2394, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 03:02:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 03:02:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 36. [2019-10-15 03:02:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 03:02:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-10-15 03:02:07,463 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 21 [2019-10-15 03:02:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:07,463 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-10-15 03:02:07,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-15 03:02:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-10-15 03:02:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 03:02:07,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:07,465 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:07,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:07,669 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:07,670 INFO L82 PathProgramCache]: Analyzing trace with hash 580545519, now seen corresponding path program 4 times [2019-10-15 03:02:07,670 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:07,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596193148] [2019-10-15 03:02:07,670 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:07,671 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:07,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:07,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596193148] [2019-10-15 03:02:07,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639206751] [2019-10-15 03:02:07,985 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 [2019-10-15 03:02:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:08,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 03:02:08,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:08,051 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:08,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510824275] [2019-10-15 03:02:08,729 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:08,729 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:08,730 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:08,730 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:08,730 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:08,754 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 6 for LOIs [2019-10-15 03:02:08,839 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 7 iterations. Over-approximation may be very coarse. [2019-10-15 03:02:08,848 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 03:02:08,875 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 3 for LOIs [2019-10-15 03:02:08,881 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:09,265 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:09,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 9] total 57 [2019-10-15 03:02:09,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762929163] [2019-10-15 03:02:09,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-10-15 03:02:09,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-10-15 03:02:09,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=1994, Unknown=0, NotChecked=0, Total=3192 [2019-10-15 03:02:09,271 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 57 states. [2019-10-15 03:02:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:12,296 INFO L93 Difference]: Finished difference Result 147 states and 198 transitions. [2019-10-15 03:02:12,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-10-15 03:02:12,296 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 33 [2019-10-15 03:02:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:12,298 INFO L225 Difference]: With dead ends: 147 [2019-10-15 03:02:12,298 INFO L226 Difference]: Without dead ends: 116 [2019-10-15 03:02:12,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3516, Invalid=7614, Unknown=0, NotChecked=0, Total=11130 [2019-10-15 03:02:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-15 03:02:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 60. [2019-10-15 03:02:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 03:02:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2019-10-15 03:02:12,316 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 33 [2019-10-15 03:02:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:12,317 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2019-10-15 03:02:12,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-10-15 03:02:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2019-10-15 03:02:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 03:02:12,319 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:12,319 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:12,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:12,523 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash -800480145, now seen corresponding path program 5 times [2019-10-15 03:02:12,524 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:12,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940655971] [2019-10-15 03:02:12,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:12,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:12,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:13,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940655971] [2019-10-15 03:02:13,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861865483] [2019-10-15 03:02:13,731 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 [2019-10-15 03:02:13,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-15 03:02:13,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:13,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 03:02:13,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:13,873 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:17,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105111461] [2019-10-15 03:02:17,091 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:17,092 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:17,092 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:17,092 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:17,093 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:17,103 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 6 for LOIs [2019-10-15 03:02:17,158 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 7 iterations. Over-approximation may be very coarse. [2019-10-15 03:02:17,167 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 03:02:17,184 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 3 for LOIs [2019-10-15 03:02:17,186 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:17,639 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:17,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 9] total 105 [2019-10-15 03:02:17,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127060517] [2019-10-15 03:02:17,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-10-15 03:02:17,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-10-15 03:02:17,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2019-10-15 03:02:17,645 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 105 states. [2019-10-15 03:02:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:25,792 INFO L93 Difference]: Finished difference Result 267 states and 366 transitions. [2019-10-15 03:02:25,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2019-10-15 03:02:25,793 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 57 [2019-10-15 03:02:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:25,795 INFO L225 Difference]: With dead ends: 267 [2019-10-15 03:02:25,795 INFO L226 Difference]: Without dead ends: 212 [2019-10-15 03:02:25,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7423 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=13908, Invalid=26694, Unknown=0, NotChecked=0, Total=40602 [2019-10-15 03:02:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-15 03:02:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 108. [2019-10-15 03:02:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-15 03:02:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2019-10-15 03:02:25,835 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 57 [2019-10-15 03:02:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:25,835 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2019-10-15 03:02:25,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-10-15 03:02:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2019-10-15 03:02:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 03:02:25,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:25,839 INFO L380 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:26,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:26,052 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:26,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1675389585, now seen corresponding path program 6 times [2019-10-15 03:02:26,053 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:26,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992677732] [2019-10-15 03:02:26,054 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:26,054 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:26,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:30,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992677732] [2019-10-15 03:02:30,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63819810] [2019-10-15 03:02:30,420 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:30,555 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:02:30,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:30,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 96 conjunts are in the unsatisfiable core [2019-10-15 03:02:30,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:30,599 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:41,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495735375] [2019-10-15 03:02:41,153 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:41,154 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:41,156 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:41,156 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:41,159 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:41,182 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2019-10-15 03:02:41,268 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 7 iterations. Over-approximation may be very coarse. [2019-10-15 03:02:41,281 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2019-10-15 03:02:41,295 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 3 for LOIs [2019-10-15 03:02:41,297 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:42,019 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:42,020 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97, 9] total 201 [2019-10-15 03:02:42,020 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879977579] [2019-10-15 03:02:42,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 201 states [2019-10-15 03:02:42,022 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2019-10-15 03:02:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18550, Invalid=21650, Unknown=0, NotChecked=0, Total=40200 [2019-10-15 03:02:42,027 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 201 states.