java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_init7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:06,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:06,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:06,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:06,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:06,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:06,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:06,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:06,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:06,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:06,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:06,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:06,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:06,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:06,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:06,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:06,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:06,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:06,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:06,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:06,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:06,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:06,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:06,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:06,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:06,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:06,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:06,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:06,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:34:06,912 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:06,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:06,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:06,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:06,918 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:06,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:06,918 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:06,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:06,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:06,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:06,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:06,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:06,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:06,922 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:06,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:06,922 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:06,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:06,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:06,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:06,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:06,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:06,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:06,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:06,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:06,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:06,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:06,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:06,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:06,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:34:07,204 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:07,217 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:07,221 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:07,223 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:07,223 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:07,224 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2019-10-15 01:34:07,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423fb43ed/853c6a9ddb15424c8c3b80587b42ca19/FLAGb8f02b8f6 [2019-10-15 01:34:07,748 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:07,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2019-10-15 01:34:07,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423fb43ed/853c6a9ddb15424c8c3b80587b42ca19/FLAGb8f02b8f6 [2019-10-15 01:34:08,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423fb43ed/853c6a9ddb15424c8c3b80587b42ca19 [2019-10-15 01:34:08,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:08,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:08,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:08,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:08,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:08,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:08" (1/1) ... [2019-10-15 01:34:08,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9b8ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08, skipping insertion in model container [2019-10-15 01:34:08,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:08" (1/1) ... [2019-10-15 01:34:08,157 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:08,176 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:08,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:08,358 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:08,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:08,483 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:08,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08 WrapperNode [2019-10-15 01:34:08,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:08,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:08,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:08,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:08,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08" (1/1) ... [2019-10-15 01:34:08,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08" (1/1) ... [2019-10-15 01:34:08,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08" (1/1) ... [2019-10-15 01:34:08,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08" (1/1) ... [2019-10-15 01:34:08,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08" (1/1) ... [2019-10-15 01:34:08,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08" (1/1) ... [2019-10-15 01:34:08,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08" (1/1) ... [2019-10-15 01:34:08,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:08,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:08,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:08,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:08,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:08,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:08,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:08,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:08,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:09,043 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:09,043 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-15 01:34:09,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:09 BoogieIcfgContainer [2019-10-15 01:34:09,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:09,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:09,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:09,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:09,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:08" (1/3) ... [2019-10-15 01:34:09,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fd7ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:09, skipping insertion in model container [2019-10-15 01:34:09,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:08" (2/3) ... [2019-10-15 01:34:09,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fd7ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:09, skipping insertion in model container [2019-10-15 01:34:09,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:09" (3/3) ... [2019-10-15 01:34:09,054 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-1.i [2019-10-15 01:34:09,062 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:09,070 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:09,081 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:09,104 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:09,105 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:09,105 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:09,105 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:09,105 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:09,105 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:09,105 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:09,105 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 01:34:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:34:09,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:09,127 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:09,129 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1872680520, now seen corresponding path program 1 times [2019-10-15 01:34:09,142 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:09,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610349226] [2019-10-15 01:34:09,142 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:09,143 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:09,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:34:09,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610349226] [2019-10-15 01:34:09,320 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:09,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:09,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498194893] [2019-10-15 01:34:09,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:09,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:09,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:09,350 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-15 01:34:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:09,452 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2019-10-15 01:34:09,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:09,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-15 01:34:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:09,466 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:34:09,467 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:34:09,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:34:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-15 01:34:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:34:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-10-15 01:34:09,520 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2019-10-15 01:34:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:09,521 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-10-15 01:34:09,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-10-15 01:34:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:34:09,523 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:09,523 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:09,523 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash 802380745, now seen corresponding path program 1 times [2019-10-15 01:34:09,525 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:09,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433843036] [2019-10-15 01:34:09,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:09,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:09,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:34:09,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433843036] [2019-10-15 01:34:09,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914758100] [2019-10-15 01:34:09,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:09,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:09,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:34:09,729 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:34:09,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508482817] [2019-10-15 01:34:09,792 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:34:09,792 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:09,800 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:09,808 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:09,809 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:10,067 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:11,281 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:11,294 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:11,299 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:11,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:11,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:11,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29237362] [2019-10-15 01:34:11,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:11,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:11,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:11,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:11,973 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 17 states. [2019-10-15 01:34:12,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:12,816 INFO L93 Difference]: Finished difference Result 79 states and 113 transitions. [2019-10-15 01:34:12,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:12,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-15 01:34:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:12,819 INFO L225 Difference]: With dead ends: 79 [2019-10-15 01:34:12,820 INFO L226 Difference]: Without dead ends: 58 [2019-10-15 01:34:12,822 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-15 01:34:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2019-10-15 01:34:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-15 01:34:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-10-15 01:34:12,846 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2019-10-15 01:34:12,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:12,847 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-10-15 01:34:12,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:12,847 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-10-15 01:34:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:34:12,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:12,851 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:13,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:13,053 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:13,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash -968414200, now seen corresponding path program 2 times [2019-10-15 01:34:13,054 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:13,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856461093] [2019-10-15 01:34:13,054 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:13,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:13,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:34:13,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856461093] [2019-10-15 01:34:13,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949797690] [2019-10-15 01:34:13,233 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:13,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:13,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:13,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:13,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:34:13,379 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:34:13,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1404714727] [2019-10-15 01:34:13,449 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:34:13,449 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:13,450 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:13,451 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:13,451 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:13,484 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:14,312 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:14,321 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:14,324 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:15,164 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:15,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:15,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533245498] [2019-10-15 01:34:15,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:15,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:15,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:15,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:15,167 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 23 states. [2019-10-15 01:34:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:16,423 INFO L93 Difference]: Finished difference Result 139 states and 194 transitions. [2019-10-15 01:34:16,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:16,424 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2019-10-15 01:34:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:16,427 INFO L225 Difference]: With dead ends: 139 [2019-10-15 01:34:16,427 INFO L226 Difference]: Without dead ends: 100 [2019-10-15 01:34:16,428 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 102 SyntacticMatches, 30 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-15 01:34:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2019-10-15 01:34:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-15 01:34:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2019-10-15 01:34:16,446 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 45 [2019-10-15 01:34:16,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:16,447 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2019-10-15 01:34:16,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2019-10-15 01:34:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-15 01:34:16,450 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:16,450 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:16,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:16,655 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1028419416, now seen corresponding path program 3 times [2019-10-15 01:34:16,656 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:16,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273895387] [2019-10-15 01:34:16,656 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:16,656 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:16,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-15 01:34:16,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273895387] [2019-10-15 01:34:16,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322431447] [2019-10-15 01:34:16,907 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:17,013 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:17,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:17,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:17,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-15 01:34:17,047 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-15 01:34:17,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1177027314] [2019-10-15 01:34:17,233 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:34:17,233 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:17,234 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:17,234 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:17,234 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:17,268 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:17,847 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:17,853 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:17,856 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:19,309 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:19,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:19,310 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814892302] [2019-10-15 01:34:19,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:19,312 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:19,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:19,313 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 35 states. [2019-10-15 01:34:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:21,420 INFO L93 Difference]: Finished difference Result 259 states and 356 transitions. [2019-10-15 01:34:21,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:21,420 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2019-10-15 01:34:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:21,423 INFO L225 Difference]: With dead ends: 259 [2019-10-15 01:34:21,423 INFO L226 Difference]: Without dead ends: 184 [2019-10-15 01:34:21,425 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 175 SyntacticMatches, 66 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-10-15 01:34:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2019-10-15 01:34:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:34:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 182 transitions. [2019-10-15 01:34:21,452 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 182 transitions. Word has length 87 [2019-10-15 01:34:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:21,452 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 182 transitions. [2019-10-15 01:34:21,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 182 transitions. [2019-10-15 01:34:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:34:21,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:21,458 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:21,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:21,672 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:21,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:21,672 INFO L82 PathProgramCache]: Analyzing trace with hash 521847272, now seen corresponding path program 4 times [2019-10-15 01:34:21,672 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:21,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722238336] [2019-10-15 01:34:21,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:21,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:21,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-10-15 01:34:22,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722238336] [2019-10-15 01:34:22,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501463170] [2019-10-15 01:34:22,280 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:22,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:22,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-10-15 01:34:22,520 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-10-15 01:34:23,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946305704] [2019-10-15 01:34:23,356 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:34:23,356 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:23,357 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:23,357 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:23,357 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:23,381 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:24,047 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:24,056 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:24,060 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:28,016 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:28,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:28,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44028575] [2019-10-15 01:34:28,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:28,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:28,021 INFO L87 Difference]: Start difference. First operand 175 states and 182 transitions. Second operand 59 states. [2019-10-15 01:34:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:32,743 INFO L93 Difference]: Finished difference Result 499 states and 680 transitions. [2019-10-15 01:34:32,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:32,744 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 171 [2019-10-15 01:34:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:32,748 INFO L225 Difference]: With dead ends: 499 [2019-10-15 01:34:32,748 INFO L226 Difference]: Without dead ends: 352 [2019-10-15 01:34:32,752 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 343 SyntacticMatches, 138 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12551 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-10-15 01:34:32,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 343. [2019-10-15 01:34:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:34:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 350 transitions. [2019-10-15 01:34:32,799 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 350 transitions. Word has length 171 [2019-10-15 01:34:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:32,800 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 350 transitions. [2019-10-15 01:34:32,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 350 transitions. [2019-10-15 01:34:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2019-10-15 01:34:32,807 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:32,808 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:33,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:33,015 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:33,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:33,016 INFO L82 PathProgramCache]: Analyzing trace with hash -769997720, now seen corresponding path program 5 times [2019-10-15 01:34:33,016 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:33,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672264487] [2019-10-15 01:34:33,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:33,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:33,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7567 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 6486 trivial. 0 not checked. [2019-10-15 01:34:34,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672264487] [2019-10-15 01:34:34,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125739970] [2019-10-15 01:34:34,402 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true