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_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:02,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:02,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:02,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:02,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:02,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:02,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:02,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:02,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:02,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:02,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:02,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:02,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:02,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:02,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:02,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:02,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:02,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:02,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:02,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:02,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:02,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:02,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:02,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:02,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:02,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:02,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:02,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:02,631 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 01:31:02,653 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:02,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:02,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:02,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:02,657 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:02,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:02,657 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:02,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:02,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:02,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:02,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:02,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:02,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:02,660 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:02,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:02,660 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:02,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:02,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:02,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:02,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:02,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:02,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:02,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:02,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:02,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:02,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:02,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:02,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:02,663 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 01:31:02,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:02,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:02,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:02,997 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:02,998 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:02,998 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-10-15 01:31:03,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b911bb3e/5f1486a163474b38896c0e8cf64225a6/FLAG94bb1c29e [2019-10-15 01:31:03,542 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:03,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-10-15 01:31:03,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b911bb3e/5f1486a163474b38896c0e8cf64225a6/FLAG94bb1c29e [2019-10-15 01:31:03,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b911bb3e/5f1486a163474b38896c0e8cf64225a6 [2019-10-15 01:31:03,892 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:03,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:03,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:03,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:03,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:03,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:03" (1/1) ... [2019-10-15 01:31:03,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3d015c 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 01:31:03,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:03" (1/1) ... [2019-10-15 01:31:03,910 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:03,930 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:04,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:04,141 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:04,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:04,274 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:04,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04 WrapperNode [2019-10-15 01:31:04,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:04,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:04,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:04,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:04,292 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 01:31:04,292 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 01:31:04,315 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 01:31:04,315 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 01:31:04,325 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 01:31:04,333 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 01:31:04,335 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 01:31:04,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:04,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:04,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:04,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:04,339 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 01:31:04,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:04,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:04,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:04,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:31:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-15 01:31:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:31:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:31:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:04,933 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:04,934 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 01:31:04,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:04 BoogieIcfgContainer [2019-10-15 01:31:04,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:04,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:04,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:04,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:04,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:03" (1/3) ... [2019-10-15 01:31:04,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ddd78d 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 01:31:04,944 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 01:31:04,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ddd78d 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 01:31:04,944 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 01:31:04,946 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2019-10-15 01:31:04,957 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:04,969 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:04,982 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:05,021 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:05,021 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:05,022 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:05,022 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:05,022 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:05,022 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:05,022 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:05,022 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:05,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-15 01:31:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:31:05,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:05,044 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 01:31:05,046 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1007897624, now seen corresponding path program 1 times [2019-10-15 01:31:05,058 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:05,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044951336] [2019-10-15 01:31:05,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:05,276 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 01:31:05,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044951336] [2019-10-15 01:31:05,278 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:05,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:31:05,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676432753] [2019-10-15 01:31:05,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:31:05,287 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:05,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:31:05,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:31:05,309 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2019-10-15 01:31:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:05,436 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2019-10-15 01:31:05,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:31:05,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-15 01:31:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:05,450 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:31:05,451 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:31:05,455 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 01:31:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:31:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-15 01:31:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:31:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 43 transitions. [2019-10-15 01:31:05,501 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 43 transitions. Word has length 19 [2019-10-15 01:31:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:05,502 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 43 transitions. [2019-10-15 01:31:05,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:31:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 43 transitions. [2019-10-15 01:31:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:31:05,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:05,503 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] [2019-10-15 01:31:05,504 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash 229580911, now seen corresponding path program 1 times [2019-10-15 01:31:05,505 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:05,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454118767] [2019-10-15 01:31:05,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:05,574 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 01:31:05,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454118767] [2019-10-15 01:31:05,578 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:05,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:05,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63371726] [2019-10-15 01:31:05,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 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 3 interpolants. [2019-10-15 01:31:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:05,582 INFO L87 Difference]: Start difference. First operand 28 states and 43 transitions. Second operand 3 states. [2019-10-15 01:31:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:05,637 INFO L93 Difference]: Finished difference Result 50 states and 80 transitions. [2019-10-15 01:31:05,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:05,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-15 01:31:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:05,639 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:31:05,640 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:31:05,641 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 01:31:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:31:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 01:31:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:31:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 44 transitions. [2019-10-15 01:31:05,649 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 44 transitions. Word has length 20 [2019-10-15 01:31:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:05,650 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 44 transitions. [2019-10-15 01:31:05,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:05,651 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 44 transitions. [2019-10-15 01:31:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:31:05,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:05,655 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] [2019-10-15 01:31:05,655 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash 269324722, now seen corresponding path program 1 times [2019-10-15 01:31:05,658 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:05,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146518229] [2019-10-15 01:31:05,659 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,659 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:05,788 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 01:31:05,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146518229] [2019-10-15 01:31:05,789 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:05,789 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:31:05,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815447749] [2019-10-15 01:31:05,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:31:05,791 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:05,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:31:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:05,794 INFO L87 Difference]: Start difference. First operand 29 states and 44 transitions. Second operand 4 states. [2019-10-15 01:31:05,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:05,883 INFO L93 Difference]: Finished difference Result 48 states and 76 transitions. [2019-10-15 01:31:05,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:05,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-15 01:31:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:05,885 INFO L225 Difference]: With dead ends: 48 [2019-10-15 01:31:05,885 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:31:05,886 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 01:31:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:31:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 01:31:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:31:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2019-10-15 01:31:05,894 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 21 [2019-10-15 01:31:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:05,894 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2019-10-15 01:31:05,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:31:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2019-10-15 01:31:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:31:05,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:05,896 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, 1, 1, 1, 1] [2019-10-15 01:31:05,896 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:05,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2044994938, now seen corresponding path program 1 times [2019-10-15 01:31:05,897 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:05,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104270091] [2019-10-15 01:31:05,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:05,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:06,017 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 01:31:06,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104270091] [2019-10-15 01:31:06,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117587474] [2019-10-15 01:31:06,019 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 01:31:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:06,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:31:06,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:06,153 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 01:31:06,154 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:06,188 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 01:31:06,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180070679] [2019-10-15 01:31:06,216 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:31:06,217 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:06,223 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:06,232 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:06,232 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:06,421 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:08,253 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:08,308 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:08,314 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:08,771 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2019-10-15 01:31:09,159 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:09,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:31:09,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556637941] [2019-10-15 01:31:09,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:31:09,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:09,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:31:09,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:31:09,163 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 18 states. [2019-10-15 01:31:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:09,965 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2019-10-15 01:31:09,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:31:09,965 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2019-10-15 01:31:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:09,967 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:31:09,967 INFO L226 Difference]: Without dead ends: 30 [2019-10-15 01:31:09,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 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 01:31:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-15 01:31:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-15 01:31:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:31:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-10-15 01:31:09,979 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 28 [2019-10-15 01:31:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:09,983 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-10-15 01:31:09,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:31:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-10-15 01:31:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:31:09,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:09,984 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, 1, 1, 1, 1] [2019-10-15 01:31:10,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:10,187 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1298290889, now seen corresponding path program 2 times [2019-10-15 01:31:10,188 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:10,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574764767] [2019-10-15 01:31:10,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:10,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:10,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:10,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574764767] [2019-10-15 01:31:10,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285319033] [2019-10-15 01:31:10,317 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 01:31:10,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:31:10,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:10,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:31:10,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:10,463 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:10,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2146846508] [2019-10-15 01:31:10,505 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:31:10,506 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:10,506 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:10,507 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:10,507 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:10,568 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:12,067 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:12,109 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:12,114 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:12,903 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21 [2019-10-15 01:31:12,904 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:12,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 19 [2019-10-15 01:31:12,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760703875] [2019-10-15 01:31:12,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:31:12,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:31:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:31:12,907 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 19 states. [2019-10-15 01:31:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:13,886 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2019-10-15 01:31:13,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:31:13,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2019-10-15 01:31:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:13,888 INFO L225 Difference]: With dead ends: 57 [2019-10-15 01:31:13,888 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:31:13,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 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 01:31:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:31:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-15 01:31:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-15 01:31:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-15 01:31:13,899 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 29 [2019-10-15 01:31:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:13,899 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-15 01:31:13,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:31:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-15 01:31:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:31:13,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:13,900 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:14,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:14,105 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1705994344, now seen corresponding path program 3 times [2019-10-15 01:31:14,107 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:14,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516000056] [2019-10-15 01:31:14,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:14,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:14,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:15,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516000056] [2019-10-15 01:31:15,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469655084] [2019-10-15 01:31:15,674 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 01:31:15,769 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:15,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:15,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 77 conjunts are in the unsatisfiable core [2019-10-15 01:31:15,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:16,866 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:18,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928212566] [2019-10-15 01:31:18,339 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:31:18,339 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:18,340 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:18,340 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:18,340 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:18,376 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:19,379 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:19,409 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:19,413 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:20,306 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2019-10-15 01:31:20,922 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:20,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 78 [2019-10-15 01:31:20,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042484026] [2019-10-15 01:31:20,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-10-15 01:31:20,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:20,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-10-15 01:31:20,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5738, Unknown=0, NotChecked=0, Total=6006 [2019-10-15 01:31:20,928 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 78 states. [2019-10-15 01:31:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:25,425 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2019-10-15 01:31:25,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 01:31:25,426 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 37 [2019-10-15 01:31:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:25,427 INFO L225 Difference]: With dead ends: 65 [2019-10-15 01:31:25,427 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:31:25,432 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 53 SyntacticMatches, 12 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=461, Invalid=9639, Unknown=0, NotChecked=0, Total=10100 [2019-10-15 01:31:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:31:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-10-15 01:31:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-15 01:31:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2019-10-15 01:31:25,442 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 37 [2019-10-15 01:31:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:25,443 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2019-10-15 01:31:25,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-10-15 01:31:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2019-10-15 01:31:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:31:25,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:25,444 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:25,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:25,650 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:25,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:25,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1727052881, now seen corresponding path program 4 times [2019-10-15 01:31:25,651 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:25,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906643192] [2019-10-15 01:31:25,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:25,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:25,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:25,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906643192] [2019-10-15 01:31:25,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170735919] [2019-10-15 01:31:25,721 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 01:31:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:25,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:31:25,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:25,859 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:25,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710644335] [2019-10-15 01:31:25,892 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:31:25,892 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:25,893 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:25,893 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:25,893 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:25,926 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2019-10-15 01:31:26,721 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:26,748 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:26,752 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:27,558 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:27,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 24 [2019-10-15 01:31:27,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426825390] [2019-10-15 01:31:27,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:31:27,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:27,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:31:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:31:27,561 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 24 states. [2019-10-15 01:31:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:28,818 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2019-10-15 01:31:28,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:31:28,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2019-10-15 01:31:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:28,825 INFO L225 Difference]: With dead ends: 118 [2019-10-15 01:31:28,826 INFO L226 Difference]: Without dead ends: 67 [2019-10-15 01:31:28,827 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 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 01:31:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-15 01:31:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-10-15 01:31:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-15 01:31:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2019-10-15 01:31:28,839 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 38 [2019-10-15 01:31:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:28,840 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2019-10-15 01:31:28,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:31:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2019-10-15 01:31:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-15 01:31:28,841 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:28,841 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:29,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:29,053 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:29,054 INFO L82 PathProgramCache]: Analyzing trace with hash 145426994, now seen corresponding path program 5 times [2019-10-15 01:31:29,055 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:29,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603616488] [2019-10-15 01:31:29,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:29,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:29,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:31:29,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603616488] [2019-10-15 01:31:29,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088156160] [2019-10-15 01:31:29,125 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 01:31:29,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:29,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:29,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:31:29,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:31:29,317 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:31:29,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040689691] [2019-10-15 01:31:29,375 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:31:29,376 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:29,376 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:29,376 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:29,377 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:29,404 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:30,120 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:30,153 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:30,157 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:30,921 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:30,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 25 [2019-10-15 01:31:30,922 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769119734] [2019-10-15 01:31:30,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:31:30,923 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:31:30,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:31:30,925 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 25 states. [2019-10-15 01:31:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:32,347 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2019-10-15 01:31:32,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:31:32,347 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 39 [2019-10-15 01:31:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:32,348 INFO L225 Difference]: With dead ends: 70 [2019-10-15 01:31:32,349 INFO L226 Difference]: Without dead ends: 47 [2019-10-15 01:31:32,350 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:31:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-15 01:31:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-15 01:31:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-15 01:31:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-15 01:31:32,359 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 39 [2019-10-15 01:31:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:32,359 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-15 01:31:32,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:31:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-15 01:31:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 01:31:32,361 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:32,361 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:32,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:32,566 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:32,566 INFO L82 PathProgramCache]: Analyzing trace with hash -119252730, now seen corresponding path program 6 times [2019-10-15 01:31:32,567 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:32,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83126068] [2019-10-15 01:31:32,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:32,568 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:32,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:34,704 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2019-10-15 01:31:34,959 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2019-10-15 01:31:35,151 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2019-10-15 01:31:35,312 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-15 01:31:35,460 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2019-10-15 01:31:35,651 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2019-10-15 01:31:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:36,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83126068] [2019-10-15 01:31:36,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123389043] [2019-10-15 01:31:36,699 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 01:31:36,846 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:36,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:36,852 WARN L254 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-15 01:31:36,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:38,632 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:41,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1868599228] [2019-10-15 01:31:41,153 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:31:41,154 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:41,154 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:41,154 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:41,155 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:41,184 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2019-10-15 01:31:42,048 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:42,069 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:42,075 INFO L183 IcfgInterpreter]: Interpretation finished