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_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:48,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:48,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:48,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:48,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:48,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:48,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:48,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:48,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:48,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:48,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:48,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:48,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:48,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:48,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:48,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:48,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:48,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:48,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:48,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:48,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:48,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:48,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:48,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:48,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:35:48,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:35:48,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:35:48,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:35:48,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:35:48,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:35:48,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:35:48,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:35:48,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:35:48,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:35:49,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:35:49,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:35:49,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:35:49,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:35:49,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:49,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:49,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:49,008 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 01:35:49,037 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:49,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:49,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:49,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:49,042 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:49,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:49,042 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:49,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:49,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:49,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:49,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:49,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:49,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:49,045 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:49,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:49,046 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:49,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:49,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:49,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:49,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:49,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:49,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:49,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:49,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:49,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:49,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:49,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:49,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:49,051 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 01:35:49,331 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:49,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:49,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:49,353 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:49,353 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:49,354 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-10-15 01:35:49,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6d0c496e/572ae1fbab444dd8a2542da0dfa37c73/FLAGfd64e176f [2019-10-15 01:35:49,769 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:49,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-10-15 01:35:49,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6d0c496e/572ae1fbab444dd8a2542da0dfa37c73/FLAGfd64e176f [2019-10-15 01:35:50,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6d0c496e/572ae1fbab444dd8a2542da0dfa37c73 [2019-10-15 01:35:50,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:50,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:50,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:50,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:50,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:50,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:50" (1/1) ... [2019-10-15 01:35:50,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56714b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50, skipping insertion in model container [2019-10-15 01:35:50,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:50" (1/1) ... [2019-10-15 01:35:50,182 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:50,199 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:50,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:50,347 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:50,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:50,384 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:50,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50 WrapperNode [2019-10-15 01:35:50,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:50,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:50,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:50,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:50,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50" (1/1) ... [2019-10-15 01:35:50,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50" (1/1) ... [2019-10-15 01:35:50,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50" (1/1) ... [2019-10-15 01:35:50,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50" (1/1) ... [2019-10-15 01:35:50,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50" (1/1) ... [2019-10-15 01:35:50,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50" (1/1) ... [2019-10-15 01:35:50,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50" (1/1) ... [2019-10-15 01:35:50,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:50,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:50,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:50,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:50,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50" (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 01:35:50,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:50,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:50,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:50,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:50,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:50,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:50,933 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:50,933 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:35:50,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:50 BoogieIcfgContainer [2019-10-15 01:35:50,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:50,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:50,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:50,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:50,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:50" (1/3) ... [2019-10-15 01:35:50,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c03629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:50, skipping insertion in model container [2019-10-15 01:35:50,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:50" (2/3) ... [2019-10-15 01:35:50,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c03629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:50, skipping insertion in model container [2019-10-15 01:35:50,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:50" (3/3) ... [2019-10-15 01:35:50,943 INFO L109 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2019-10-15 01:35:50,953 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:50,961 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:50,973 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:50,998 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:50,998 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:50,998 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:50,998 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:50,998 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:50,999 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:50,999 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:50,999 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-15 01:35:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:35:51,023 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:51,024 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:51,026 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:51,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1038582055, now seen corresponding path program 1 times [2019-10-15 01:35:51,042 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:51,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876012973] [2019-10-15 01:35:51,042 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,043 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:51,213 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 01:35:51,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876012973] [2019-10-15 01:35:51,215 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:51,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:51,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860479146] [2019-10-15 01:35:51,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:51,222 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:51,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:51,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:51,239 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-10-15 01:35:51,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:51,306 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-10-15 01:35:51,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:51,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:35:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:51,321 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:35:51,321 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 01:35:51,329 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 01:35:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 01:35:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2019-10-15 01:35:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 01:35:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 01:35:51,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-10-15 01:35:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:51,375 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 01:35:51,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 01:35:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:51,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:51,376 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:51,376 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1360247690, now seen corresponding path program 1 times [2019-10-15 01:35:51,377 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:51,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203108840] [2019-10-15 01:35:51,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:51,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203108840] [2019-10-15 01:35:51,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608404305] [2019-10-15 01:35:51,467 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 01:35:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:51,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:51,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:51,555 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:51,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982062341] [2019-10-15 01:35:51,622 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:35:51,623 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:51,630 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:51,637 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:51,637 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:51,796 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:52,191 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:35:52,213 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:52,223 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:52,697 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:52,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:35:52,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234921725] [2019-10-15 01:35:52,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:35:52,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:52,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:35:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:35:52,704 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 17 states. [2019-10-15 01:35:53,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:53,339 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-15 01:35:53,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:35:53,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 12 [2019-10-15 01:35:53,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:53,341 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:35:53,342 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:35:53,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:35:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:35:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2019-10-15 01:35:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:35:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-15 01:35:53,351 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2019-10-15 01:35:53,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:53,351 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-15 01:35:53,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:35:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-15 01:35:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:35:53,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:53,353 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:53,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:53,556 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1001094681, now seen corresponding path program 2 times [2019-10-15 01:35:53,557 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:53,558 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331055713] [2019-10-15 01:35:53,558 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:53,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:53,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:53,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331055713] [2019-10-15 01:35:53,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643151480] [2019-10-15 01:35:53,640 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 01:35:53,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:53,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:53,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:35:53,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:53,697 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:53,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113174064] [2019-10-15 01:35:53,847 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:35:53,847 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:53,847 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:53,848 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:53,848 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:53,898 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:54,118 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:35:54,136 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:54,143 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:54,541 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:54,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:35:54,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643401317] [2019-10-15 01:35:54,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:35:54,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:35:54,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:35:54,545 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 23 states. [2019-10-15 01:35:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:55,389 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2019-10-15 01:35:55,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:35:55,390 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 15 [2019-10-15 01:35:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:55,391 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:35:55,391 INFO L226 Difference]: Without dead ends: 59 [2019-10-15 01:35:55,394 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:35:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-15 01:35:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 25. [2019-10-15 01:35:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:35:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-15 01:35:55,409 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-10-15 01:35:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:55,409 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-15 01:35:55,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:35:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-15 01:35:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:35:55,410 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:55,410 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:55,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:55,621 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:55,622 INFO L82 PathProgramCache]: Analyzing trace with hash 804785927, now seen corresponding path program 3 times [2019-10-15 01:35:55,622 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:55,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149171743] [2019-10-15 01:35:55,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:55,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:55,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:55,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149171743] [2019-10-15 01:35:55,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765979116] [2019-10-15 01:35:55,808 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 01:35:55,853 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:55,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:55,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:35:55,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:55,869 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:56,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214387588] [2019-10-15 01:35:56,084 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:35:56,084 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:56,085 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:56,085 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:56,085 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:56,129 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:56,279 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:35:56,305 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:56,309 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:56,698 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:56,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:35:56,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919273855] [2019-10-15 01:35:56,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:35:56,700 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:56,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:35:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:35:56,701 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 35 states. [2019-10-15 01:35:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:58,580 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2019-10-15 01:35:58,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 01:35:58,580 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 21 [2019-10-15 01:35:58,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:58,585 INFO L225 Difference]: With dead ends: 116 [2019-10-15 01:35:58,585 INFO L226 Difference]: Without dead ends: 107 [2019-10-15 01:35:58,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1063, Invalid=2843, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 01:35:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-15 01:35:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 37. [2019-10-15 01:35:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:35:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-15 01:35:58,611 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 21 [2019-10-15 01:35:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:58,611 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-15 01:35:58,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:35:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-15 01:35:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:35:58,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:58,613 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:58,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:58,825 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:58,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1965153977, now seen corresponding path program 4 times [2019-10-15 01:35:58,826 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:58,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482761827] [2019-10-15 01:35:58,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:58,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:58,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:59,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482761827] [2019-10-15 01:35:59,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361641615] [2019-10-15 01:35:59,143 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 01:35:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:59,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:35:59,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:59,243 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:59,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903159130] [2019-10-15 01:35:59,906 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:35:59,906 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:59,906 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:59,906 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:59,906 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:59,937 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:00,063 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:00,074 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:00,078 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:00,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:00,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:36:00,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429354954] [2019-10-15 01:36:00,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:36:00,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:00,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:36:00,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=2123, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:36:00,503 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 59 states. [2019-10-15 01:36:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:04,694 INFO L93 Difference]: Finished difference Result 212 states and 281 transitions. [2019-10-15 01:36:04,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-15 01:36:04,694 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 33 [2019-10-15 01:36:04,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:04,697 INFO L225 Difference]: With dead ends: 212 [2019-10-15 01:36:04,697 INFO L226 Difference]: Without dead ends: 203 [2019-10-15 01:36:04,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3787, Invalid=8423, Unknown=0, NotChecked=0, Total=12210 [2019-10-15 01:36:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-10-15 01:36:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 61. [2019-10-15 01:36:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:36:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2019-10-15 01:36:04,747 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 33 [2019-10-15 01:36:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:04,748 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2019-10-15 01:36:04,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:36:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2019-10-15 01:36:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:36:04,752 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:04,752 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:04,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:04,958 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:04,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1906432569, now seen corresponding path program 5 times [2019-10-15 01:36:04,959 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:04,960 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949797690] [2019-10-15 01:36:04,960 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:04,960 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:04,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:05,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949797690] [2019-10-15 01:36:05,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198786039] [2019-10-15 01:36:05,942 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