/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-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:58:56,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:58:56,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:58:56,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:58:56,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:58:56,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:58:56,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:58:56,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:58:56,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:58:56,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:58:56,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:58:56,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:58:56,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:58:56,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:58:56,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:58:56,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:58:56,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:58:56,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:58:56,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:58:56,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:58:56,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:58:56,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:58:56,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:58:56,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:58:56,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 03:58:56,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:58:56,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:58:56,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:58:56,126 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 03:58:56,147 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:58:56,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:58:56,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:58:56,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:58:56,149 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:58:56,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:58:56,150 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:58:56,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:58:56,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:58:56,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:58:56,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:58:56,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:58:56,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:58:56,151 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:58:56,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:58:56,151 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:58:56,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:58:56,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:58:56,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:58:56,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:58:56,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:58:56,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:58:56,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:58:56,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:58:56,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:58:56,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:58:56,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:58:56,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:58:56,154 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 03:58:56,411 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:58:56,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:58:56,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:58:56,428 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:58:56,429 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:58:56,429 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-11-07 03:58:56,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d95b024/fea41b2975444b20931ee7fc710e1b0a/FLAG631fcb8b1 [2019-11-07 03:58:56,958 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:58:56,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-11-07 03:58:56,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d95b024/fea41b2975444b20931ee7fc710e1b0a/FLAG631fcb8b1 [2019-11-07 03:58:57,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d95b024/fea41b2975444b20931ee7fc710e1b0a [2019-11-07 03:58:57,496 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:58:57,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:58:57,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:58:57,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:58:57,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:58:57,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:58:57" (1/1) ... [2019-11-07 03:58:57,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fb3d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57, skipping insertion in model container [2019-11-07 03:58:57,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:58:57" (1/1) ... [2019-11-07 03:58:57,541 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:58:57,571 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:58:57,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:58:57,767 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:58:57,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:58:57,793 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:58:57,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57 WrapperNode [2019-11-07 03:58:57,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:58:57,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:58:57,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:58:57,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:58:57,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57" (1/1) ... [2019-11-07 03:58:57,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57" (1/1) ... [2019-11-07 03:58:57,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57" (1/1) ... [2019-11-07 03:58:57,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57" (1/1) ... [2019-11-07 03:58:57,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57" (1/1) ... [2019-11-07 03:58:57,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57" (1/1) ... [2019-11-07 03:58:57,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57" (1/1) ... [2019-11-07 03:58:57,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:58:57,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:58:57,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:58:57,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:58:57,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57" (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 03:58:57,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:58:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:58:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 03:58:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:58:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:58:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 03:58:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:58:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:58:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:58:58,190 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:58:58,190 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 03:58:58,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:58:58 BoogieIcfgContainer [2019-11-07 03:58:58,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:58:58,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:58:58,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:58:58,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:58:58,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:58:57" (1/3) ... [2019-11-07 03:58:58,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64160c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:58:58, skipping insertion in model container [2019-11-07 03:58:58,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:57" (2/3) ... [2019-11-07 03:58:58,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64160c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:58:58, skipping insertion in model container [2019-11-07 03:58:58,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:58:58" (3/3) ... [2019-11-07 03:58:58,219 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2019-11-07 03:58:58,232 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:58:58,241 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:58:58,271 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:58:58,300 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:58:58,300 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:58:58,301 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:58:58,301 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:58:58,301 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:58:58,301 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:58:58,301 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:58:58,301 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:58:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-07 03:58:58,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 03:58:58,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:58,338 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:58,340 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:58,346 INFO L82 PathProgramCache]: Analyzing trace with hash -838692905, now seen corresponding path program 1 times [2019-11-07 03:58:58,358 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:58,359 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060193105] [2019-11-07 03:58:58,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:58,594 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 03:58:58,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060193105] [2019-11-07 03:58:58,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:58:58,598 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:58:58,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048195148] [2019-11-07 03:58:58,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:58:58,609 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:58,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:58:58,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:58:58,630 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-07 03:58:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:58,673 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-07 03:58:58,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:58:58,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-07 03:58:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:58,688 INFO L225 Difference]: With dead ends: 31 [2019-11-07 03:58:58,689 INFO L226 Difference]: Without dead ends: 14 [2019-11-07 03:58:58,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:58:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-07 03:58:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-07 03:58:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-07 03:58:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-07 03:58:58,748 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-07 03:58:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:58,749 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-07 03:58:58,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:58:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-07 03:58:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 03:58:58,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:58,750 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:58,751 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash -284821231, now seen corresponding path program 1 times [2019-11-07 03:58:58,755 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:58,755 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546733397] [2019-11-07 03:58:58,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:58,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546733397] [2019-11-07 03:58:58,819 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:58:58,819 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:58:58,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313614660] [2019-11-07 03:58:58,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:58:58,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:58,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:58:58,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:58:58,823 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-07 03:58:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:58,837 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2019-11-07 03:58:58,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:58:58,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 03:58:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:58,839 INFO L225 Difference]: With dead ends: 21 [2019-11-07 03:58:58,839 INFO L226 Difference]: Without dead ends: 14 [2019-11-07 03:58:58,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:58:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-07 03:58:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-07 03:58:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-07 03:58:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-07 03:58:58,845 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2019-11-07 03:58:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:58,846 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-07 03:58:58,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:58:58,846 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-07 03:58:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 03:58:58,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:58,847 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:58,847 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:58,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:58,848 INFO L82 PathProgramCache]: Analyzing trace with hash -147777241, now seen corresponding path program 1 times [2019-11-07 03:58:58,848 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:58,848 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182187938] [2019-11-07 03:58:58,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:58,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182187938] [2019-11-07 03:58:58,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667202390] [2019-11-07 03:58:58,962 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 03:58:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:59,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 03:58:59,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:59,069 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:58:59,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486953919] [2019-11-07 03:58:59,134 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 03:58:59,135 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:59,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:59,152 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:59,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:59,208 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 03:58:59,543 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2019-11-07 03:58:59,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 03:58:59,559 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:58:59,882 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:58:59,882 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 7] total 15 [2019-11-07 03:58:59,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206558705] [2019-11-07 03:58:59,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-07 03:58:59,884 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:59,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-07 03:58:59,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-11-07 03:58:59,886 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 15 states. [2019-11-07 03:59:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:00,480 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2019-11-07 03:59:00,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 03:59:00,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2019-11-07 03:59:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:00,483 INFO L225 Difference]: With dead ends: 35 [2019-11-07 03:59:00,483 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 03:59:00,489 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2019-11-07 03:59:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 03:59:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-07 03:59:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 03:59:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-07 03:59:00,501 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 13 [2019-11-07 03:59:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:00,502 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-07 03:59:00,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-07 03:59:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-07 03:59:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 03:59:00,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:00,504 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:00,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:59:00,718 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:00,719 INFO L82 PathProgramCache]: Analyzing trace with hash 689631679, now seen corresponding path program 2 times [2019-11-07 03:59:00,719 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:00,719 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634111501] [2019-11-07 03:59:00,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 03:59:00,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634111501] [2019-11-07 03:59:00,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070924793] [2019-11-07 03:59:00,842 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 03:59:00,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-07 03:59:00,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:59:00,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 03:59:00,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:59:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 03:59:00,931 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:59:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 03:59:00,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570327649] [2019-11-07 03:59:00,983 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 03:59:00,984 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:59:00,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:59:00,984 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:59:00,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:59:00,997 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 03:59:01,203 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 87 for LOIs [2019-11-07 03:59:01,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 03:59:01,228 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:59:01,505 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:59:01,506 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 7] total 15 [2019-11-07 03:59:01,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432489161] [2019-11-07 03:59:01,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-07 03:59:01,508 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:01,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-07 03:59:01,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-07 03:59:01,509 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 15 states. [2019-11-07 03:59:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:01,807 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2019-11-07 03:59:01,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 03:59:01,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2019-11-07 03:59:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:01,809 INFO L225 Difference]: With dead ends: 61 [2019-11-07 03:59:01,809 INFO L226 Difference]: Without dead ends: 43 [2019-11-07 03:59:01,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2019-11-07 03:59:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-07 03:59:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-07 03:59:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-07 03:59:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-07 03:59:01,821 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 26 [2019-11-07 03:59:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:01,822 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-07 03:59:01,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-07 03:59:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-07 03:59:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 03:59:01,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:01,824 INFO L410 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:02,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:59:02,028 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:02,028 INFO L82 PathProgramCache]: Analyzing trace with hash -690259521, now seen corresponding path program 3 times [2019-11-07 03:59:02,028 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:02,029 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588560348] [2019-11-07 03:59:02,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-07 03:59:02,191 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588560348] [2019-11-07 03:59:02,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96081905] [2019-11-07 03:59:02,192 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 03:59:02,249 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 03:59:02,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:59:02,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-07 03:59:02,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:59:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-07 03:59:02,395 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:59:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 10 proven. 314 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-07 03:59:02,729 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306791294] [2019-11-07 03:59:02,730 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 03:59:02,730 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:59:02,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:59:02,731 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:59:02,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:59:02,740 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 03:59:02,871 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 58 for LOIs [2019-11-07 03:59:02,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 03:59:02,885 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:59:03,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:59:03,363 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12, 7] total 35 [2019-11-07 03:59:03,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833067434] [2019-11-07 03:59:03,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 03:59:03,366 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:03,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 03:59:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 03:59:03,367 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 35 states. [2019-11-07 03:59:05,129 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2019-11-07 03:59:05,261 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 15 [2019-11-07 03:59:05,429 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-11-07 03:59:05,616 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-11-07 03:59:08,043 WARN L191 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-11-07 03:59:10,171 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2019-11-07 03:59:10,370 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2019-11-07 03:59:24,911 WARN L191 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-11-07 03:59:25,332 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2019-11-07 03:59:27,953 WARN L191 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2019-11-07 03:59:28,223 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2019-11-07 03:59:34,196 WARN L191 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2019-11-07 03:59:40,670 WARN L191 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2019-11-07 03:59:42,978 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 26 [2019-11-07 03:59:47,017 WARN L191 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 39 DAG size of output: 28