java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:36:29,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:36:29,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:36:29,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:36:29,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:36:29,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:36:29,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:36:29,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:36:29,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:36:29,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:36:29,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:36:29,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:36:29,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:36:29,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:36:29,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:36:29,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:36:29,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:36:29,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:36:29,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:36:29,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:36:29,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:36:29,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:36:29,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:36:29,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:36:29,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:36:29,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:36:29,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:36:29,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:36:29,332 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 01:36:29,347 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:36:29,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:36:29,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:36:29,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:36:29,349 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:36:29,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:36:29,349 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:36:29,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:36:29,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:36:29,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:36:29,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:36:29,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:36:29,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:36:29,350 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:36:29,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:36:29,351 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:36:29,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:36:29,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:36:29,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:36:29,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:36:29,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:36:29,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:29,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:36:29,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:36:29,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:36:29,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:36:29,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:36:29,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:36:29,354 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 01:36:29,669 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:36:29,690 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:36:29,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:36:29,694 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:36:29,695 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:36:29,695 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2019-10-15 01:36:29,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa03d5ca5/35e8dd93472d41d597cb394118eace0e/FLAG12f6111e1 [2019-10-15 01:36:30,205 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:36:30,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2019-10-15 01:36:30,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa03d5ca5/35e8dd93472d41d597cb394118eace0e/FLAG12f6111e1 [2019-10-15 01:36:30,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa03d5ca5/35e8dd93472d41d597cb394118eace0e [2019-10-15 01:36:30,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:36:30,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:36:30,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:30,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:36:30,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:36:30,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac730e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30, skipping insertion in model container [2019-10-15 01:36:30,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,621 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:36:30,641 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:36:30,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:30,914 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:36:30,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:31,145 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:36:31,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31 WrapperNode [2019-10-15 01:36:31,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:31,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:36:31,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:36:31,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:36:31,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:36:31,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:36:31,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:36:31,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:36:31,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31" (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 01:36:31,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:36:31,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:36:31,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:36:31,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:36:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:36:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:36:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:36:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:36:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:36:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:36:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:36:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:36:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:36:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:36:31,816 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:36:31,817 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:36:31,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:31 BoogieIcfgContainer [2019-10-15 01:36:31,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:36:31,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:36:31,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:36:31,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:36:31,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:36:30" (1/3) ... [2019-10-15 01:36:31,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3affce2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:31, skipping insertion in model container [2019-10-15 01:36:31,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31" (2/3) ... [2019-10-15 01:36:31,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3affce2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:31, skipping insertion in model container [2019-10-15 01:36:31,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:31" (3/3) ... [2019-10-15 01:36:31,828 INFO L109 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2019-10-15 01:36:31,837 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:36:31,845 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:36:31,857 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:36:31,879 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:36:31,879 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:36:31,880 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:36:31,880 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:36:31,881 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:36:31,881 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:36:31,881 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:36:31,881 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:36:31,897 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:36:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:36:31,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:31,903 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:31,905 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:31,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1264123479, now seen corresponding path program 1 times [2019-10-15 01:36:31,918 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:31,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162334631] [2019-10-15 01:36:31,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:31,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:31,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:32,097 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 01:36:32,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162334631] [2019-10-15 01:36:32,099 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:32,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:36:32,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267970811] [2019-10-15 01:36:32,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:36:32,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:32,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:36:32,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:36:32,119 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:36:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:32,203 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-10-15 01:36:32,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:36:32,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:36:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:32,215 INFO L225 Difference]: With dead ends: 38 [2019-10-15 01:36:32,216 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:36:32,221 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 01:36:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:36:32,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-15 01:36:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:36:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-15 01:36:32,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2019-10-15 01:36:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:32,258 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-15 01:36:32,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:36:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-15 01:36:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:36:32,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:32,259 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:32,260 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:32,260 INFO L82 PathProgramCache]: Analyzing trace with hash -392956526, now seen corresponding path program 1 times [2019-10-15 01:36:32,261 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:32,261 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054461338] [2019-10-15 01:36:32,261 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:32,261 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:32,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:36:32,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054461338] [2019-10-15 01:36:32,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296442327] [2019-10-15 01:36:32,362 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 01:36:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:32,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:32,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:36:32,460 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:36:32,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237153637] [2019-10-15 01:36:32,533 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:36:32,533 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:32,554 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:32,569 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:32,570 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:32,762 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:33,322 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 201 [2019-10-15 01:36:33,425 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,539 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,661 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-10-15 01:36:33,712 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,835 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2019-10-15 01:36:34,574 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:34,604 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:34,751 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2019-10-15 01:36:34,786 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:35,214 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:35,227 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:35,233 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:35,919 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:35,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:36:35,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119638238] [2019-10-15 01:36:35,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:36:35,923 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:35,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:36:35,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:36:35,927 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 18 states. [2019-10-15 01:36:36,608 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-10-15 01:36:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:37,073 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-15 01:36:37,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:36:37,075 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-10-15 01:36:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:37,077 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:36:37,077 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:36:37,082 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:36:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:36:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-10-15 01:36:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:36:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-15 01:36:37,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2019-10-15 01:36:37,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:37,099 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-15 01:36:37,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:36:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-15 01:36:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:36:37,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:37,101 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:37,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:37,305 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:37,305 INFO L82 PathProgramCache]: Analyzing trace with hash -127994615, now seen corresponding path program 2 times [2019-10-15 01:36:37,306 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:37,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673558355] [2019-10-15 01:36:37,306 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:37,306 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:37,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:36:37,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673558355] [2019-10-15 01:36:37,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862561601] [2019-10-15 01:36:37,456 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 01:36:37,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:36:37,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:37,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:36:37,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:36:37,565 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:36:37,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601110392] [2019-10-15 01:36:37,631 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:36:37,631 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:37,631 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:37,632 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:37,632 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:37,675 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:38,012 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 225 [2019-10-15 01:36:38,036 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:38,154 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2019-10-15 01:36:38,199 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:38,377 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:38,829 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:39,059 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:39,200 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2019-10-15 01:36:39,619 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:39,629 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:39,632 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:39,999 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2019-10-15 01:36:40,368 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:40,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7, 11] total 24 [2019-10-15 01:36:40,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152325328] [2019-10-15 01:36:40,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:36:40,370 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:40,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:36:40,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:36:40,373 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 24 states. [2019-10-15 01:36:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:42,064 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2019-10-15 01:36:42,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:36:42,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2019-10-15 01:36:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:42,068 INFO L225 Difference]: With dead ends: 71 [2019-10-15 01:36:42,068 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:36:42,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=364, Invalid=1276, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:36:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:36:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2019-10-15 01:36:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-15 01:36:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-15 01:36:42,080 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2019-10-15 01:36:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:42,080 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-15 01:36:42,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:36:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-15 01:36:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:36:42,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:42,082 INFO L380 BasicCegarLoop]: trace histogram [10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:42,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:42,286 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash 701320466, now seen corresponding path program 3 times [2019-10-15 01:36:42,287 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:42,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455666075] [2019-10-15 01:36:42,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:42,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:42,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:36:42,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455666075] [2019-10-15 01:36:42,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166275159] [2019-10-15 01:36:42,498 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 01:36:42,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:42,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:42,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:36:42,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:36:42,605 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:36:42,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555919502] [2019-10-15 01:36:42,693 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:36:42,693 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:42,694 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:42,694 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:42,695 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:42,715 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:42,913 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,991 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:43,268 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:43,587 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:43,625 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:43,830 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:44,063 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:44,071 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:44,078 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:44,728 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:44,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 26 [2019-10-15 01:36:44,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353552892] [2019-10-15 01:36:44,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:36:44,731 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:36:44,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:36:44,733 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 26 states. [2019-10-15 01:36:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:46,855 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2019-10-15 01:36:46,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:36:46,856 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2019-10-15 01:36:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:46,858 INFO L225 Difference]: With dead ends: 91 [2019-10-15 01:36:46,858 INFO L226 Difference]: Without dead ends: 66 [2019-10-15 01:36:46,861 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=455, Invalid=1615, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:36:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-15 01:36:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-10-15 01:36:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-15 01:36:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-10-15 01:36:46,873 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 37 [2019-10-15 01:36:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:46,874 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-10-15 01:36:46,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:36:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-10-15 01:36:46,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 01:36:46,876 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:46,876 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:47,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:47,083 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1575063017, now seen corresponding path program 4 times [2019-10-15 01:36:47,084 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:47,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072773672] [2019-10-15 01:36:47,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:47,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:47,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:36:47,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072773672] [2019-10-15 01:36:47,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956368379] [2019-10-15 01:36:47,286 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 01:36:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:47,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:36:47,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-15 01:36:47,419 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-15 01:36:47,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092174897] [2019-10-15 01:36:47,657 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:36:47,657 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:47,657 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:47,658 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:47,658 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:47,676 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:47,887 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:48,031 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:48,075 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:48,416 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:48,556 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:48,944 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:48,959 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:48,961 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:49,796 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:49,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 40 [2019-10-15 01:36:49,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80219578] [2019-10-15 01:36:49,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:36:49,798 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:36:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1108, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:36:49,800 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 40 states. [2019-10-15 01:36:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:53,689 INFO L93 Difference]: Finished difference Result 165 states and 195 transitions. [2019-10-15 01:36:53,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:36:53,690 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 60 [2019-10-15 01:36:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:53,692 INFO L225 Difference]: With dead ends: 165 [2019-10-15 01:36:53,692 INFO L226 Difference]: Without dead ends: 119 [2019-10-15 01:36:53,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 170 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1420, Invalid=3836, Unknown=0, NotChecked=0, Total=5256 [2019-10-15 01:36:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-15 01:36:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 81. [2019-10-15 01:36:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-15 01:36:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2019-10-15 01:36:53,726 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 60 [2019-10-15 01:36:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:53,726 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2019-10-15 01:36:53,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:36:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2019-10-15 01:36:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:36:53,731 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:53,731 INFO L380 BasicCegarLoop]: trace histogram [26, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:53,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:53,946 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:53,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1748959122, now seen corresponding path program 5 times [2019-10-15 01:36:53,947 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:53,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818281752] [2019-10-15 01:36:53,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:53,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:53,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:36:54,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818281752] [2019-10-15 01:36:54,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180153197] [2019-10-15 01:36:54,241 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