java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:46,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:46,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:47,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:47,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:47,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:47,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:47,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:47,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:47,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:47,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:47,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:47,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:47,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:47,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:47,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:47,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:47,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:47,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:47,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:47,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:47,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:47,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:47,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:47,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:31:47,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:31:47,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:31:47,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:31:47,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:31:47,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:31:47,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:31:47,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:31:47,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:31:47,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:31:47,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:31:47,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:31:47,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:31:47,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:31:47,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:47,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:47,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:47,079 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 01:31:47,114 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:47,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:47,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:47,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:47,119 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:47,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:47,119 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:47,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:47,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:47,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:47,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:47,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:47,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:47,121 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:47,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:47,121 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:47,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:47,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:47,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:47,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:47,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:47,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:47,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:47,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:47,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:47,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:47,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:47,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:47,124 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 01:31:47,433 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:47,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:47,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:47,459 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:47,459 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:47,460 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2019-10-15 01:31:47,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87431a61a/f5cd9987afa649eaaf9c210789b9122a/FLAGac9c46ee3 [2019-10-15 01:31:47,961 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:47,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2019-10-15 01:31:47,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87431a61a/f5cd9987afa649eaaf9c210789b9122a/FLAGac9c46ee3 [2019-10-15 01:31:48,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87431a61a/f5cd9987afa649eaaf9c210789b9122a [2019-10-15 01:31:48,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:48,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:48,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:48,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:48,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:48,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:48" (1/1) ... [2019-10-15 01:31:48,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ea241b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48, skipping insertion in model container [2019-10-15 01:31:48,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:48" (1/1) ... [2019-10-15 01:31:48,405 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:48,427 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:48,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:48,635 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:48,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:48,768 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:48,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48 WrapperNode [2019-10-15 01:31:48,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:48,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:48,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:48,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:48,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48" (1/1) ... [2019-10-15 01:31:48,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48" (1/1) ... [2019-10-15 01:31:48,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48" (1/1) ... [2019-10-15 01:31:48,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48" (1/1) ... [2019-10-15 01:31:48,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48" (1/1) ... [2019-10-15 01:31:48,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48" (1/1) ... [2019-10-15 01:31:48,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48" (1/1) ... [2019-10-15 01:31:48,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:48,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:48,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:48,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:48,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48" (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 01:31:48,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:48,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:48,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:48,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:49,279 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:49,279 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 01:31:49,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:49 BoogieIcfgContainer [2019-10-15 01:31:49,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:49,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:49,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:49,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:49,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:48" (1/3) ... [2019-10-15 01:31:49,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7752e33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:49, skipping insertion in model container [2019-10-15 01:31:49,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:48" (2/3) ... [2019-10-15 01:31:49,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7752e33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:49, skipping insertion in model container [2019-10-15 01:31:49,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:49" (3/3) ... [2019-10-15 01:31:49,291 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2019-10-15 01:31:49,301 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:49,309 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:49,319 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:49,340 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:49,340 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:49,340 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:49,340 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:49,340 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:49,341 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:49,341 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:49,341 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:31:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:49,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:49,361 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:49,363 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:49,367 INFO L82 PathProgramCache]: Analyzing trace with hash -573825775, now seen corresponding path program 1 times [2019-10-15 01:31:49,374 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:49,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951876458] [2019-10-15 01:31:49,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:49,530 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 01:31:49,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951876458] [2019-10-15 01:31:49,531 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:49,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:49,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357064444] [2019-10-15 01:31:49,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:49,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:49,550 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-15 01:31:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:49,587 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-10-15 01:31:49,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:49,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:31:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:49,598 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:31:49,598 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 01:31:49,602 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 01:31:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 01:31:49,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-15 01:31:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:31:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-10-15 01:31:49,643 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2019-10-15 01:31:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:49,644 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-10-15 01:31:49,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-10-15 01:31:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:31:49,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:49,645 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:49,645 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:49,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1140036509, now seen corresponding path program 1 times [2019-10-15 01:31:49,646 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:49,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369520512] [2019-10-15 01:31:49,647 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,647 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:49,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369520512] [2019-10-15 01:31:49,700 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:49,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:49,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134641682] [2019-10-15 01:31:49,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:49,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:49,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:49,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:49,703 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2019-10-15 01:31:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:49,726 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-10-15 01:31:49,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:49,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:31:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:49,729 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:31:49,729 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:31:49,730 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 01:31:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:31:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:31:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:31:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:31:49,738 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2019-10-15 01:31:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:49,739 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:31:49,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:31:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:31:49,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:49,740 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:49,741 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1123124524, now seen corresponding path program 1 times [2019-10-15 01:31:49,742 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:49,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767891567] [2019-10-15 01:31:49,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:49,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767891567] [2019-10-15 01:31:49,798 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:49,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:49,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410376764] [2019-10-15 01:31:49,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:49,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:49,800 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:31:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:49,811 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-10-15 01:31:49,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:49,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-15 01:31:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:49,813 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:31:49,813 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:31:49,814 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 01:31:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:31:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:31:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:31:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:31:49,820 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2019-10-15 01:31:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:49,820 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:31:49,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:49,821 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:31:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:31:49,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:49,822 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:49,822 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:49,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:49,822 INFO L82 PathProgramCache]: Analyzing trace with hash -685002894, now seen corresponding path program 1 times [2019-10-15 01:31:49,823 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:49,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131958382] [2019-10-15 01:31:49,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:49,909 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 01:31:49,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131958382] [2019-10-15 01:31:49,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063957786] [2019-10-15 01:31:49,910 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 01:31:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:49,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:49,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:50,003 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 01:31:50,003 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:50,048 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 01:31:50,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852388875] [2019-10-15 01:31:50,075 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:50,076 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:50,082 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:50,094 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:50,094 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:50,262 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:50,804 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:50,819 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:50,825 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:51,318 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:51,318 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 13] total 19 [2019-10-15 01:31:51,319 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919586242] [2019-10-15 01:31:51,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:31:51,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:31:51,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:31:51,322 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 19 states. [2019-10-15 01:31:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:52,223 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2019-10-15 01:31:52,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:31:52,223 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 17 [2019-10-15 01:31:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:52,228 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:31:52,228 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 01:31:52,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:31:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 01:31:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-10-15 01:31:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:31:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-15 01:31:52,240 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2019-10-15 01:31:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:52,240 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-15 01:31:52,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:31:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-15 01:31:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:31:52,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:52,242 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:52,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:52,447 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash -143319426, now seen corresponding path program 2 times [2019-10-15 01:31:52,448 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:52,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386448283] [2019-10-15 01:31:52,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:52,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386448283] [2019-10-15 01:31:52,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945753684] [2019-10-15 01:31:52,538 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 01:31:52,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:52,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:52,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:31:52,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:52,631 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:52,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662087599] [2019-10-15 01:31:52,686 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:52,686 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:52,687 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:52,687 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:52,687 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:52,722 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:53,094 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:53,111 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:53,118 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:53,588 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:53,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 13] total 25 [2019-10-15 01:31:53,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850728344] [2019-10-15 01:31:53,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:31:53,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:31:53,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:31:53,592 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 25 states. [2019-10-15 01:31:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:54,561 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2019-10-15 01:31:54,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:31:54,565 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 20 [2019-10-15 01:31:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:54,566 INFO L225 Difference]: With dead ends: 59 [2019-10-15 01:31:54,566 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:31:54,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2019-10-15 01:31:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:31:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-10-15 01:31:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:31:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-15 01:31:54,582 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 20 [2019-10-15 01:31:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:54,583 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-15 01:31:54,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:31:54,583 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-15 01:31:54,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:31:54,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:54,584 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:54,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:54,795 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:54,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1928611330, now seen corresponding path program 3 times [2019-10-15 01:31:54,795 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:54,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324416638] [2019-10-15 01:31:54,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:54,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:54,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:54,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324416638] [2019-10-15 01:31:54,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465420142] [2019-10-15 01:31:54,978 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 01:31:55,056 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:55,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:55,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:31:55,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:55,075 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:55,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [359503857] [2019-10-15 01:31:55,295 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:55,295 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:55,295 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:55,296 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:55,296 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:55,330 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:55,549 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:55,564 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:55,568 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:56,068 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:56,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13] total 37 [2019-10-15 01:31:56,069 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562346748] [2019-10-15 01:31:56,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-15 01:31:56,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-15 01:31:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:31:56,072 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 37 states. [2019-10-15 01:31:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:57,557 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2019-10-15 01:31:57,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-15 01:31:57,558 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 26 [2019-10-15 01:31:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:57,560 INFO L225 Difference]: With dead ends: 71 [2019-10-15 01:31:57,560 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:31:57,563 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=974, Invalid=3718, Unknown=0, NotChecked=0, Total=4692 [2019-10-15 01:31:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:31:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2019-10-15 01:31:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:31:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-15 01:31:57,573 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2019-10-15 01:31:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:57,574 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-15 01:31:57,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-15 01:31:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-15 01:31:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:31:57,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:57,575 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:57,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:57,779 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:57,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1848185086, now seen corresponding path program 4 times [2019-10-15 01:31:57,780 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:57,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682629122] [2019-10-15 01:31:57,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:57,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:57,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:58,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682629122] [2019-10-15 01:31:58,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827036940] [2019-10-15 01:31:58,196 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 01:31:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:58,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:31:58,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:58,324 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:59,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574171910] [2019-10-15 01:31:59,040 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:59,041 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:59,041 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:59,041 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:59,041 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:59,064 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:59,264 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:59,270 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:59,273 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:59,825 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:59,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 13] total 61 [2019-10-15 01:31:59,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413618445] [2019-10-15 01:31:59,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 01:31:59,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:59,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 01:31:59,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1215, Invalid=2445, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 01:31:59,830 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 61 states. [2019-10-15 01:32:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:02,832 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2019-10-15 01:32:02,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-10-15 01:32:02,832 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 38 [2019-10-15 01:32:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:02,834 INFO L225 Difference]: With dead ends: 95 [2019-10-15 01:32:02,834 INFO L226 Difference]: Without dead ends: 79 [2019-10-15 01:32:02,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3227 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3554, Invalid=10018, Unknown=0, NotChecked=0, Total=13572 [2019-10-15 01:32:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-15 01:32:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2019-10-15 01:32:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-15 01:32:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-10-15 01:32:02,850 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 38 [2019-10-15 01:32:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:02,850 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-10-15 01:32:02,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-15 01:32:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-10-15 01:32:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-15 01:32:02,852 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:02,852 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:03,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:03,060 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:03,061 INFO L82 PathProgramCache]: Analyzing trace with hash 390348542, now seen corresponding path program 5 times [2019-10-15 01:32:03,061 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:03,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516463309] [2019-10-15 01:32:03,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:03,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:03,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:32:04,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516463309] [2019-10-15 01:32:04,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747272986] [2019-10-15 01:32:04,204 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 [2019-10-15 01:32:04,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:32:04,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:04,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:04,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:32:04,343 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:32:04,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424143939] [2019-10-15 01:32:04,415 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:04,415 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:04,415 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:04,416 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:04,416 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:04,439 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:04,634 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:32:04,642 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:04,645 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:05,390 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:05,390 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4, 13] total 65 [2019-10-15 01:32:05,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621899694] [2019-10-15 01:32:05,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-10-15 01:32:05,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:05,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-10-15 01:32:05,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=2931, Unknown=0, NotChecked=0, Total=4160 [2019-10-15 01:32:05,395 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 65 states. [2019-10-15 01:32:09,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:09,281 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2019-10-15 01:32:09,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-10-15 01:32:09,282 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 62 [2019-10-15 01:32:09,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:09,284 INFO L225 Difference]: With dead ends: 99 [2019-10-15 01:32:09,284 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:32:09,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3699, Invalid=12051, Unknown=0, NotChecked=0, Total=15750 [2019-10-15 01:32:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:32:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-10-15 01:32:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-15 01:32:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-10-15 01:32:09,300 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2019-10-15 01:32:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:09,301 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-10-15 01:32:09,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-10-15 01:32:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-10-15 01:32:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:32:09,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:09,304 INFO L380 BasicCegarLoop]: trace histogram [47, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:09,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:09,510 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash 973546540, now seen corresponding path program 6 times [2019-10-15 01:32:09,511 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:09,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506621323] [2019-10-15 01:32:09,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:09,512 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:09,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:10,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506621323] [2019-10-15 01:32:10,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768363407] [2019-10-15 01:32:10,616 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:10,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:10,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:10,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-15 01:32:10,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:10,800 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:13,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011490956] [2019-10-15 01:32:13,371 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:13,371 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:13,372 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:13,372 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:13,372 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:13,388 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:13,529 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:32:13,535 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:13,537 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:14,208 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:14,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50, 13] total 111 [2019-10-15 01:32:14,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902515452] [2019-10-15 01:32:14,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-15 01:32:14,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:14,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-15 01:32:14,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4890, Invalid=7320, Unknown=0, NotChecked=0, Total=12210 [2019-10-15 01:32:14,215 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 111 states. [2019-10-15 01:32:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:21,659 INFO L93 Difference]: Finished difference Result 151 states and 209 transitions. [2019-10-15 01:32:21,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-10-15 01:32:21,660 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 66 [2019-10-15 01:32:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:21,661 INFO L225 Difference]: With dead ends: 151 [2019-10-15 01:32:21,662 INFO L226 Difference]: Without dead ends: 132 [2019-10-15 01:32:21,667 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9652 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=14479, Invalid=32393, Unknown=0, NotChecked=0, Total=46872 [2019-10-15 01:32:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-15 01:32:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2019-10-15 01:32:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-15 01:32:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2019-10-15 01:32:21,682 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 66 [2019-10-15 01:32:21,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:21,683 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2019-10-15 01:32:21,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-10-15 01:32:21,683 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2019-10-15 01:32:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:32:21,685 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:21,685 INFO L380 BasicCegarLoop]: trace histogram [96, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:21,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:21,888 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash 734515488, now seen corresponding path program 7 times [2019-10-15 01:32:21,889 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:21,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87335745] [2019-10-15 01:32:21,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:21,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:21,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4667 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:25,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87335745] [2019-10-15 01:32:25,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823181663] [2019-10-15 01:32:25,437 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:25,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 98 conjunts are in the unsatisfiable core [2019-10-15 01:32:25,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4667 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:25,692 INFO L321 TraceCheckSpWp]: Computing backward predicates...