/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/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:01:45,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:01:45,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:01:45,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:01:45,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:01:45,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:01:45,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:01:45,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:01:45,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:01:45,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:01:45,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:01:45,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:01:45,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:01:45,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:01:45,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:01:45,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:01:45,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:01:45,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:01:45,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:01:45,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:01:45,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:01:45,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:01:45,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:01:45,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:01:45,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:01:45,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:01:45,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:01:45,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:01:45,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 04:01:45,434 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:01:45,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:01:45,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:01:45,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:01:45,437 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:01:45,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:01:45,438 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:01:45,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:01:45,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:01:45,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:01:45,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:01:45,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:01:45,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:01:45,440 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:01:45,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:01:45,440 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:01:45,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:01:45,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:01:45,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:01:45,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:01:45,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:01:45,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:01:45,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:01:45,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:01:45,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:01:45,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:01:45,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:01:45,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:01:45,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:01:45,761 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:01:45,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:01:45,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:01:45,789 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:01:45,790 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:01:45,790 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-11-07 04:01:45,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed017b44/28b5a8aed7d44a8489fd070ba5e8024a/FLAG4f041dec5 [2019-11-07 04:01:46,316 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:01:46,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-11-07 04:01:46,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed017b44/28b5a8aed7d44a8489fd070ba5e8024a/FLAG4f041dec5 [2019-11-07 04:01:46,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed017b44/28b5a8aed7d44a8489fd070ba5e8024a [2019-11-07 04:01:46,690 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:01:46,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:01:46,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:01:46,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:01:46,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:01:46,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:01:46" (1/1) ... [2019-11-07 04:01:46,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4334376c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46, skipping insertion in model container [2019-11-07 04:01:46,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:01:46" (1/1) ... [2019-11-07 04:01:46,710 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:01:46,733 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:01:46,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:01:46,925 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:01:46,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:01:46,995 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:01:46,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46 WrapperNode [2019-11-07 04:01:46,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:01:46,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:01:46,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:01:46,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:01:47,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46" (1/1) ... [2019-11-07 04:01:47,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46" (1/1) ... [2019-11-07 04:01:47,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46" (1/1) ... [2019-11-07 04:01:47,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46" (1/1) ... [2019-11-07 04:01:47,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46" (1/1) ... [2019-11-07 04:01:47,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46" (1/1) ... [2019-11-07 04:01:47,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46" (1/1) ... [2019-11-07 04:01:47,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:01:47,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:01:47,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:01:47,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:01:47,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:01:47,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:01:47,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:01:47,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:01:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:01:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 04:01:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:01:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:01:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:01:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:01:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:01:47,660 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:01:47,660 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 04:01:47,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:01:47 BoogieIcfgContainer [2019-11-07 04:01:47,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:01:47,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:01:47,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:01:47,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:01:47,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:01:46" (1/3) ... [2019-11-07 04:01:47,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ba74d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:01:47, skipping insertion in model container [2019-11-07 04:01:47,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:46" (2/3) ... [2019-11-07 04:01:47,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ba74d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:01:47, skipping insertion in model container [2019-11-07 04:01:47,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:01:47" (3/3) ... [2019-11-07 04:01:47,670 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2019-11-07 04:01:47,678 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:01:47,686 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:01:47,699 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:01:47,722 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:01:47,722 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:01:47,723 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:01:47,723 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:01:47,723 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:01:47,723 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:01:47,723 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:01:47,724 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:01:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 04:01:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 04:01:47,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:01:47,758 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:01:47,760 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:01:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:01:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1133679609, now seen corresponding path program 1 times [2019-11-07 04:01:47,774 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:01:47,774 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872516424] [2019-11-07 04:01:47,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:01:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:48,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872516424] [2019-11-07 04:01:48,189 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:01:48,190 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-07 04:01:48,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818626005] [2019-11-07 04:01:48,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 04:01:48,198 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:01:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 04:01:48,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:01:48,217 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 12 states. [2019-11-07 04:01:48,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:01:48,353 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2019-11-07 04:01:48,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 04:01:48,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-07 04:01:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:01:48,364 INFO L225 Difference]: With dead ends: 30 [2019-11-07 04:01:48,364 INFO L226 Difference]: Without dead ends: 19 [2019-11-07 04:01:48,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:01:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-07 04:01:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-07 04:01:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-07 04:01:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-07 04:01:48,400 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-11-07 04:01:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:01:48,401 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-07 04:01:48,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 04:01:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-07 04:01:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 04:01:48,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:01:48,402 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:01:48,402 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:01:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:01:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash 786024767, now seen corresponding path program 1 times [2019-11-07 04:01:48,403 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:01:48,404 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954251031] [2019-11-07 04:01:48,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:01:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:48,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954251031] [2019-11-07 04:01:48,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556796543] [2019-11-07 04:01:48,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:01:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:48,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 04:01:48,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:01:48,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:48,926 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:01:48,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:48,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:49,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:49,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:49,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:49,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:49,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:49,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:49,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:49,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:49,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75143873] [2019-11-07 04:01:49,380 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 04:01:49,381 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:01:49,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:01:49,423 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:01:49,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:01:49,550 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 10 for LOIs [2019-11-07 04:01:49,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2019-11-07 04:01:49,783 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:01:50,404 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:01:50,404 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 15] total 39 [2019-11-07 04:01:50,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366220084] [2019-11-07 04:01:50,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-07 04:01:50,407 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:01:50,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-07 04:01:50,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=986, Unknown=0, NotChecked=0, Total=1482 [2019-11-07 04:01:50,410 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 39 states. [2019-11-07 04:01:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:01:51,729 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2019-11-07 04:01:51,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-07 04:01:51,731 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 18 [2019-11-07 04:01:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:01:51,732 INFO L225 Difference]: With dead ends: 34 [2019-11-07 04:01:51,733 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 04:01:51,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1026, Invalid=3134, Unknown=0, NotChecked=0, Total=4160 [2019-11-07 04:01:51,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 04:01:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-07 04:01:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-07 04:01:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-07 04:01:51,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2019-11-07 04:01:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:01:51,745 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-07 04:01:51,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-07 04:01:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-07 04:01:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-07 04:01:51,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:01:51,746 INFO L410 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:01:51,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:01:51,951 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:01:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:01:51,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1081226431, now seen corresponding path program 2 times [2019-11-07 04:01:51,952 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:01:51,952 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956090940] [2019-11-07 04:01:51,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:01:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:52,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956090940] [2019-11-07 04:01:52,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39686377] [2019-11-07 04:01:52,303 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:01:52,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-07 04:01:52,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:01:52,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 04:01:52,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:01:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:52,747 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:01:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:53,817 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407074634] [2019-11-07 04:01:53,818 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 04:01:53,818 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:01:53,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:01:53,819 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:01:53,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:01:53,845 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2019-11-07 04:01:53,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2019-11-07 04:01:53,928 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:01:54,518 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:01:54,519 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 15] total 63 [2019-11-07 04:01:54,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350567297] [2019-11-07 04:01:54,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-07 04:01:54,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:01:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-07 04:01:54,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1564, Invalid=2342, Unknown=0, NotChecked=0, Total=3906 [2019-11-07 04:01:54,524 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 63 states. [2019-11-07 04:01:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:01:57,845 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2019-11-07 04:01:57,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-07 04:01:57,846 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 30 [2019-11-07 04:01:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:01:57,848 INFO L225 Difference]: With dead ends: 58 [2019-11-07 04:01:57,848 INFO L226 Difference]: Without dead ends: 55 [2019-11-07 04:01:57,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 30 SyntacticMatches, 23 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3453 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3702, Invalid=8954, Unknown=0, NotChecked=0, Total=12656 [2019-11-07 04:01:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-07 04:01:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-07 04:01:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-07 04:01:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-11-07 04:01:57,864 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 30 [2019-11-07 04:01:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:01:57,864 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-11-07 04:01:57,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-07 04:01:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-11-07 04:01:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-07 04:01:57,866 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:01:57,866 INFO L410 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:01:58,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:01:58,070 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:01:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:01:58,071 INFO L82 PathProgramCache]: Analyzing trace with hash -986494017, now seen corresponding path program 3 times [2019-11-07 04:01:58,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:01:58,072 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700120525] [2019-11-07 04:01:58,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:01:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:59,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700120525] [2019-11-07 04:01:59,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363704291] [2019-11-07 04:01:59,165 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:01:59,234 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:01:59,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:01:59,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-07 04:01:59,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:02:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:00,541 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:02:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:04,881 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045881732] [2019-11-07 04:02:04,882 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 04:02:04,883 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:02:04,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:02:04,883 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:02:04,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:02:04,898 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2019-11-07 04:02:04,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2019-11-07 04:02:04,975 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:02:05,958 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:02:05,958 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 15] total 111 [2019-11-07 04:02:05,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205065089] [2019-11-07 04:02:05,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-11-07 04:02:05,961 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:02:05,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-11-07 04:02:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5428, Invalid=6782, Unknown=0, NotChecked=0, Total=12210 [2019-11-07 04:02:05,966 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 111 states. [2019-11-07 04:02:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:02:14,974 INFO L93 Difference]: Finished difference Result 106 states and 153 transitions. [2019-11-07 04:02:14,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-11-07 04:02:14,975 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 54 [2019-11-07 04:02:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:02:14,977 INFO L225 Difference]: With dead ends: 106 [2019-11-07 04:02:14,977 INFO L226 Difference]: Without dead ends: 103 [2019-11-07 04:02:14,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 54 SyntacticMatches, 47 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10437 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=14238, Invalid=29234, Unknown=0, NotChecked=0, Total=43472 [2019-11-07 04:02:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-07 04:02:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-11-07 04:02:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-07 04:02:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-11-07 04:02:15,000 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 54 [2019-11-07 04:02:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:02:15,001 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-11-07 04:02:15,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-11-07 04:02:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-11-07 04:02:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-07 04:02:15,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:15,005 INFO L410 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:15,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:02:15,210 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:15,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1451853377, now seen corresponding path program 4 times [2019-11-07 04:02:15,211 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:15,211 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663336683] [2019-11-07 04:02:15,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:21,212 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663336683] [2019-11-07 04:02:21,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132528053] [2019-11-07 04:02:21,213 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 04:02:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:21,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 97 conjunts are in the unsatisfiable core [2019-11-07 04:02:21,326 INFO L279 TraceCheckSpWp]: Computing forward predicates...