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-crafted/zero_sum_const_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:02,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:02,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:02,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:02,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:02,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:02,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:02,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:02,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:02,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:02,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:02,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:02,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:02,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:02,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:02,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:02,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:02,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:02,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:02,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:02,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:02,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:02,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:02,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:02,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:02,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:02,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:02,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:02,357 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 01:31:02,378 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:02,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:02,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:02,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:02,380 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:02,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:02,381 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:02,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:02,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:02,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:02,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:02,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:02,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:02,382 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:02,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:02,383 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:02,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:02,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:02,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:02,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:02,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:02,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:02,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:02,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:02,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:02,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:02,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:02,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:02,385 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 01:31:02,699 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:02,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:02,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:02,721 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:02,722 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:02,722 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2019-10-15 01:31:02,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/445293125/155edc41db4546a2a37ab569a226c471/FLAGb3eb0c413 [2019-10-15 01:31:03,256 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:03,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2019-10-15 01:31:03,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/445293125/155edc41db4546a2a37ab569a226c471/FLAGb3eb0c413 [2019-10-15 01:31:03,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/445293125/155edc41db4546a2a37ab569a226c471 [2019-10-15 01:31:03,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:03,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:03,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:03,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:03,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:03,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:03" (1/1) ... [2019-10-15 01:31:03,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15161af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:03, skipping insertion in model container [2019-10-15 01:31:03,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:03" (1/1) ... [2019-10-15 01:31:03,666 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:03,684 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:03,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:03,972 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:04,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:04,167 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:04,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04 WrapperNode [2019-10-15 01:31:04,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:04,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:04,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:04,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:04,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ... [2019-10-15 01:31:04,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ... [2019-10-15 01:31:04,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ... [2019-10-15 01:31:04,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ... [2019-10-15 01:31:04,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ... [2019-10-15 01:31:04,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ... [2019-10-15 01:31:04,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ... [2019-10-15 01:31:04,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:04,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:04,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:04,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:04,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (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 01:31:04,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:04,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:04,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:04,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:04,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:04,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:31:04,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:04,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-15 01:31:04,320 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:31:04,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:04,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:31:04,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:04,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:04,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:04,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:04,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:04,783 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:04,784 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-15 01:31:04,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:04 BoogieIcfgContainer [2019-10-15 01:31:04,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:04,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:04,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:04,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:04,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:03" (1/3) ... [2019-10-15 01:31:04,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733966d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:04, skipping insertion in model container [2019-10-15 01:31:04,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (2/3) ... [2019-10-15 01:31:04,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733966d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:04, skipping insertion in model container [2019-10-15 01:31:04,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:04" (3/3) ... [2019-10-15 01:31:04,794 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2019-10-15 01:31:04,803 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:04,811 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:04,823 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:04,853 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:04,853 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:04,853 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:04,854 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:04,854 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:04,854 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:04,854 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:04,854 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 01:31:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:31:04,877 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:04,878 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 01:31:04,880 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:04,886 INFO L82 PathProgramCache]: Analyzing trace with hash -68481076, now seen corresponding path program 1 times [2019-10-15 01:31:04,896 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:04,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294049441] [2019-10-15 01:31:04,896 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:04,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:04,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:05,124 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 01:31:05,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294049441] [2019-10-15 01:31:05,128 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:05,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:31:05,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152159254] [2019-10-15 01:31:05,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:31:05,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:31:05,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:31:05,157 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2019-10-15 01:31:05,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:05,271 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2019-10-15 01:31:05,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:31:05,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-15 01:31:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:05,284 INFO L225 Difference]: With dead ends: 45 [2019-10-15 01:31:05,285 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:31:05,288 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:31:05,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:31:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:31:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:31:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2019-10-15 01:31:05,324 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 17 [2019-10-15 01:31:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:05,325 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2019-10-15 01:31:05,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:31:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2019-10-15 01:31:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:31:05,326 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:05,327 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:05,327 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1579005837, now seen corresponding path program 1 times [2019-10-15 01:31:05,328 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:05,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532942296] [2019-10-15 01:31:05,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:05,419 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 01:31:05,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532942296] [2019-10-15 01:31:05,420 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:05,420 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:05,421 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745701687] [2019-10-15 01:31:05,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:05,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:05,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:05,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:05,424 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand 3 states. [2019-10-15 01:31:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:05,467 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2019-10-15 01:31:05,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:05,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-15 01:31:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:05,469 INFO L225 Difference]: With dead ends: 42 [2019-10-15 01:31:05,469 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:31:05,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:05,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:31:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:31:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:31:05,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2019-10-15 01:31:05,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 18 [2019-10-15 01:31:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:05,478 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2019-10-15 01:31:05,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2019-10-15 01:31:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:31:05,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:05,480 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:05,480 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:05,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1817549222, now seen corresponding path program 1 times [2019-10-15 01:31:05,481 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:05,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983364408] [2019-10-15 01:31:05,481 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,482 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:05,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983364408] [2019-10-15 01:31:05,577 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:05,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:31:05,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081327023] [2019-10-15 01:31:05,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:31:05,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:05,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:31:05,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:05,584 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand 4 states. [2019-10-15 01:31:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:05,668 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2019-10-15 01:31:05,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:05,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-15 01:31:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:05,670 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:31:05,670 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:31:05,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:31:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:31:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:31:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2019-10-15 01:31:05,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 19 [2019-10-15 01:31:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:05,679 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2019-10-15 01:31:05,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:31:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2019-10-15 01:31:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:31:05,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:05,680 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:05,681 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2017864887, now seen corresponding path program 1 times [2019-10-15 01:31:05,682 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:05,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957695392] [2019-10-15 01:31:05,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:05,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957695392] [2019-10-15 01:31:05,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387672032] [2019-10-15 01:31:05,766 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 01:31:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:05,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:31:05,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:05,906 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:05,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925654167] [2019-10-15 01:31:05,960 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:31:05,960 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:05,967 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:05,974 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:05,974 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:06,155 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:07,806 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:07,868 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:07,874 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:08,350 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2019-10-15 01:31:08,755 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:08,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:31:08,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632004398] [2019-10-15 01:31:08,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:31:08,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:08,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:31:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:31:08,760 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 18 states. [2019-10-15 01:31:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:09,442 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-10-15 01:31:09,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:31:09,442 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-10-15 01:31:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:09,443 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:31:09,443 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:31:09,444 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:31:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:31:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:31:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:31:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-10-15 01:31:09,452 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 24 [2019-10-15 01:31:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:09,453 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-10-15 01:31:09,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:31:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-10-15 01:31:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:31:09,454 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:09,454 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:09,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:09,657 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash -997981858, now seen corresponding path program 2 times [2019-10-15 01:31:09,658 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:09,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818569851] [2019-10-15 01:31:09,659 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:09,659 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:09,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:31:09,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818569851] [2019-10-15 01:31:09,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240270456] [2019-10-15 01:31:09,802 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 01:31:09,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:31:09,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:09,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:31:09,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:31:09,966 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:31:10,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223482413] [2019-10-15 01:31:10,002 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:31:10,003 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:10,005 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:10,006 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:10,006 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:10,068 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:11,547 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:11,601 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:11,607 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:12,388 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:12,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 19 [2019-10-15 01:31:12,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926815624] [2019-10-15 01:31:12,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:31:12,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:12,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:31:12,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:31:12,391 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 19 states. [2019-10-15 01:31:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:13,303 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2019-10-15 01:31:13,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:31:13,304 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2019-10-15 01:31:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:13,305 INFO L225 Difference]: With dead ends: 47 [2019-10-15 01:31:13,306 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:31:13,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:31:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:31:13,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 01:31:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:31:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-15 01:31:13,318 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 25 [2019-10-15 01:31:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:13,323 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-15 01:31:13,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:31:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-15 01:31:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 01:31:13,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:13,327 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:13,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:13,531 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:13,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash 567715820, now seen corresponding path program 3 times [2019-10-15 01:31:13,532 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:13,532 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125283265] [2019-10-15 01:31:13,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:13,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:13,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:14,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125283265] [2019-10-15 01:31:14,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707305107] [2019-10-15 01:31:14,799 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 01:31:14,888 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:14,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:14,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 61 conjunts are in the unsatisfiable core [2019-10-15 01:31:14,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:15,624 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:16,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151332799] [2019-10-15 01:31:16,500 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:31:16,500 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:16,501 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:16,501 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:16,501 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:16,533 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:17,297 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:17,325 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:17,329 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:18,118 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2019-10-15 01:31:18,679 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:18,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20, 11] total 63 [2019-10-15 01:31:18,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812013869] [2019-10-15 01:31:18,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-10-15 01:31:18,682 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:18,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-10-15 01:31:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3698, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 01:31:18,684 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 63 states. [2019-10-15 01:31:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:21,882 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-10-15 01:31:21,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:31:21,885 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 31 [2019-10-15 01:31:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:21,886 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:31:21,886 INFO L226 Difference]: Without dead ends: 48 [2019-10-15 01:31:21,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=372, Invalid=6434, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:31:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-15 01:31:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-10-15 01:31:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-15 01:31:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-10-15 01:31:21,899 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 31 [2019-10-15 01:31:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:21,900 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-10-15 01:31:21,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-10-15 01:31:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-10-15 01:31:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:31:21,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:21,901 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:22,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:22,107 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:22,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1042486227, now seen corresponding path program 4 times [2019-10-15 01:31:22,108 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:22,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913285737] [2019-10-15 01:31:22,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:22,110 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:22,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:31:22,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913285737] [2019-10-15 01:31:22,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062722514] [2019-10-15 01:31:22,185 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 01:31:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:22,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:31:22,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:31:22,339 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:31:22,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651992170] [2019-10-15 01:31:22,374 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:31:22,374 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:22,375 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:22,375 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:22,375 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:22,404 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2019-10-15 01:31:23,076 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:23,113 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:23,118 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:23,553 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2019-10-15 01:31:23,908 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:23,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 24 [2019-10-15 01:31:23,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340642640] [2019-10-15 01:31:23,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:31:23,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:31:23,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:31:23,911 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 24 states. [2019-10-15 01:31:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:25,085 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2019-10-15 01:31:25,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:31:25,089 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2019-10-15 01:31:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:25,092 INFO L225 Difference]: With dead ends: 92 [2019-10-15 01:31:25,092 INFO L226 Difference]: Without dead ends: 53 [2019-10-15 01:31:25,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:31:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-15 01:31:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-10-15 01:31:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:31:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-10-15 01:31:25,102 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 32 [2019-10-15 01:31:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:25,103 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-10-15 01:31:25,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:31:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-10-15 01:31:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:31:25,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:25,104 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:25,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:25,317 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:25,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1643204986, now seen corresponding path program 5 times [2019-10-15 01:31:25,319 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:25,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941894671] [2019-10-15 01:31:25,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:25,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:25,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:31:25,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941894671] [2019-10-15 01:31:25,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109776153] [2019-10-15 01:31:25,420 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 01:31:25,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:25,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:25,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:31:25,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:31:25,584 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:31:25,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723175473] [2019-10-15 01:31:25,638 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:31:25,638 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:25,638 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:25,639 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:25,639 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:25,668 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:26,199 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:26,222 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:26,225 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:27,022 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:27,022 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 25 [2019-10-15 01:31:27,022 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604199731] [2019-10-15 01:31:27,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:31:27,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:27,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:31:27,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:31:27,025 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 25 states. [2019-10-15 01:31:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:28,385 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-15 01:31:28,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:31:28,386 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2019-10-15 01:31:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:28,387 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:31:28,387 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:31:28,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:31:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:31:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-15 01:31:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:31:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-15 01:31:28,396 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 33 [2019-10-15 01:31:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:28,397 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-15 01:31:28,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:31:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-15 01:31:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:31:28,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:28,398 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:28,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:28,601 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1638161385, now seen corresponding path program 6 times [2019-10-15 01:31:28,602 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:28,603 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524057700] [2019-10-15 01:31:28,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:28,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:28,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:29,233 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2019-10-15 01:31:29,355 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 01:31:29,588 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2019-10-15 01:31:29,738 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-10-15 01:31:29,901 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2019-10-15 01:31:30,026 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2019-10-15 01:31:30,193 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2019-10-15 01:31:30,374 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2019-10-15 01:31:30,539 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2019-10-15 01:31:30,806 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2019-10-15 01:31:30,958 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2019-10-15 01:31:31,393 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-10-15 01:31:31,557 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2019-10-15 01:31:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:32,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524057700] [2019-10-15 01:31:32,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969339489] [2019-10-15 01:31:32,164 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 01:31:32,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:32,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:32,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-15 01:31:32,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:33,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:35,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1029876322] [2019-10-15 01:31:35,160 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:31:35,160 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:35,161 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:35,161 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:35,161 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:35,190 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2019-10-15 01:31:35,896 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:35,924 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:35,928 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:37,616 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:37,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28, 26, 11] total 90 [2019-10-15 01:31:37,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665741228] [2019-10-15 01:31:37,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-10-15 01:31:37,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:37,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-10-15 01:31:37,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=7626, Unknown=0, NotChecked=0, Total=8010 [2019-10-15 01:31:37,621 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 90 states. [2019-10-15 01:31:38,802 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2019-10-15 01:31:39,396 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2019-10-15 01:31:39,706 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2019-10-15 01:31:39,966 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2019-10-15 01:31:40,214 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2019-10-15 01:31:41,512 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2019-10-15 01:31:41,919 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 65 [2019-10-15 01:31:42,219 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2019-10-15 01:31:42,534 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2019-10-15 01:31:42,760 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51