java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:51,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:51,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:51,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:51,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:51,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:51,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:51,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:51,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:51,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:51,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:51,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:51,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:51,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:51,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:51,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:51,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:51,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:51,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:51,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:51,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:51,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:51,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:51,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:51,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:51,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:51,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:51,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:51,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:35:51,373 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:51,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:51,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:51,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:51,375 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:51,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:51,376 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:51,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:51,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:51,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:51,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:51,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:51,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:51,378 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:51,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:51,379 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:51,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:51,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:51,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:51,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:51,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:51,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:51,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:51,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:51,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:51,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:51,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:51,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:51,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:35:51,657 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:51,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:51,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:51,679 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:51,679 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:51,680 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-10-15 01:35:51,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebe30666f/dcc8c3bcd4d44758a32144b459205418/FLAG3f9bd8b77 [2019-10-15 01:35:52,264 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:52,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-10-15 01:35:52,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebe30666f/dcc8c3bcd4d44758a32144b459205418/FLAG3f9bd8b77 [2019-10-15 01:35:52,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebe30666f/dcc8c3bcd4d44758a32144b459205418 [2019-10-15 01:35:52,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:52,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:52,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:52,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:52,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:52,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:52" (1/1) ... [2019-10-15 01:35:52,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c306fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:52, skipping insertion in model container [2019-10-15 01:35:52,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:52" (1/1) ... [2019-10-15 01:35:52,737 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:52,755 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:53,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:53,014 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:53,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:53,065 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:53,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53 WrapperNode [2019-10-15 01:35:53,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:53,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:53,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:53,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:53,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53" (1/1) ... [2019-10-15 01:35:53,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53" (1/1) ... [2019-10-15 01:35:53,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53" (1/1) ... [2019-10-15 01:35:53,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53" (1/1) ... [2019-10-15 01:35:53,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53" (1/1) ... [2019-10-15 01:35:53,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53" (1/1) ... [2019-10-15 01:35:53,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53" (1/1) ... [2019-10-15 01:35:53,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:53,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:53,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:53,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:53,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:53,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:53,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:53,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:53,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:53,640 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:53,640 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:35:53,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:53 BoogieIcfgContainer [2019-10-15 01:35:53,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:53,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:53,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:53,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:53,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:52" (1/3) ... [2019-10-15 01:35:53,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cc1c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:53, skipping insertion in model container [2019-10-15 01:35:53,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:53" (2/3) ... [2019-10-15 01:35:53,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cc1c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:53, skipping insertion in model container [2019-10-15 01:35:53,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:53" (3/3) ... [2019-10-15 01:35:53,660 INFO L109 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2019-10-15 01:35:53,669 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:53,676 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:53,687 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:53,712 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:53,712 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:53,712 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:53,713 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:53,713 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:53,713 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:53,713 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:53,713 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:35:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:53,734 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:53,735 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:53,737 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:53,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:53,742 INFO L82 PathProgramCache]: Analyzing trace with hash 187881276, now seen corresponding path program 1 times [2019-10-15 01:35:53,749 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:53,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547865224] [2019-10-15 01:35:53,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:53,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:53,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:53,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547865224] [2019-10-15 01:35:53,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:53,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:53,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739860620] [2019-10-15 01:35:53,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:53,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:53,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:53,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:53,944 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:35:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:54,006 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2019-10-15 01:35:54,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:54,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:35:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:54,021 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:35:54,021 INFO L226 Difference]: Without dead ends: 23 [2019-10-15 01:35:54,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-15 01:35:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-10-15 01:35:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:35:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:35:54,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-10-15 01:35:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:54,075 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:35:54,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:35:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:35:54,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:54,076 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:54,077 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1754018738, now seen corresponding path program 1 times [2019-10-15 01:35:54,078 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:54,078 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658959811] [2019-10-15 01:35:54,078 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:54,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:54,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:54,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658959811] [2019-10-15 01:35:54,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012272405] [2019-10-15 01:35:54,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:54,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:54,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:54,253 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:54,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255357092] [2019-10-15 01:35:54,324 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:54,325 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:54,331 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:54,339 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:54,340 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:54,514 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:54,893 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:35:54,922 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:54,936 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:55,243 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:55,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 16 [2019-10-15 01:35:55,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666405419] [2019-10-15 01:35:55,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 01:35:55,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:55,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 01:35:55,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:35:55,248 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2019-10-15 01:35:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:55,824 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-10-15 01:35:55,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:35:55,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-10-15 01:35:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:55,827 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:35:55,827 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:35:55,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:35:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:35:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 21. [2019-10-15 01:35:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:35:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-15 01:35:55,838 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2019-10-15 01:35:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:55,838 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-15 01:35:55,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 01:35:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-15 01:35:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:35:55,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:55,840 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:56,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:56,044 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:56,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1907323972, now seen corresponding path program 2 times [2019-10-15 01:35:56,045 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:56,046 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624595368] [2019-10-15 01:35:56,046 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,046 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:56,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624595368] [2019-10-15 01:35:56,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232445030] [2019-10-15 01:35:56,149 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:56,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:56,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:56,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:35:56,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:56,224 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:56,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151161535] [2019-10-15 01:35:56,288 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:56,288 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:56,289 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:56,289 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:56,289 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:56,332 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:56,527 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:35:56,539 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:56,545 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:56,805 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:56,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 22 [2019-10-15 01:35:56,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844485706] [2019-10-15 01:35:56,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:35:56,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:56,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:35:56,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:35:56,807 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 22 states. [2019-10-15 01:35:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:57,639 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2019-10-15 01:35:57,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:35:57,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 16 [2019-10-15 01:35:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:57,642 INFO L225 Difference]: With dead ends: 90 [2019-10-15 01:35:57,642 INFO L226 Difference]: Without dead ends: 79 [2019-10-15 01:35:57,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:35:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-15 01:35:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 27. [2019-10-15 01:35:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:35:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-15 01:35:57,664 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2019-10-15 01:35:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:57,665 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-15 01:35:57,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:35:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-15 01:35:57,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:35:57,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:57,666 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:57,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:57,867 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash 335045244, now seen corresponding path program 3 times [2019-10-15 01:35:57,868 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:57,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932017991] [2019-10-15 01:35:57,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:57,870 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:57,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:58,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932017991] [2019-10-15 01:35:58,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089795315] [2019-10-15 01:35:58,087 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:58,145 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:58,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:58,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:35:58,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:58,163 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:58,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409611174] [2019-10-15 01:35:58,388 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:58,389 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:58,389 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:58,390 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:58,391 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:58,424 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:58,569 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:35:58,590 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:58,595 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:58,869 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:58,870 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 34 [2019-10-15 01:35:58,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907338983] [2019-10-15 01:35:58,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 01:35:58,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:58,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 01:35:58,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:35:58,873 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 34 states. [2019-10-15 01:36:00,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:00,523 INFO L93 Difference]: Finished difference Result 162 states and 218 transitions. [2019-10-15 01:36:00,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 01:36:00,523 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 22 [2019-10-15 01:36:00,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:00,525 INFO L225 Difference]: With dead ends: 162 [2019-10-15 01:36:00,525 INFO L226 Difference]: Without dead ends: 151 [2019-10-15 01:36:00,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1055, Invalid=2727, Unknown=0, NotChecked=0, Total=3782 [2019-10-15 01:36:00,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-15 01:36:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 39. [2019-10-15 01:36:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:36:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-10-15 01:36:00,544 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2019-10-15 01:36:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:00,544 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-10-15 01:36:00,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-15 01:36:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-10-15 01:36:00,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:36:00,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:00,545 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:00,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:00,752 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1332731900, now seen corresponding path program 4 times [2019-10-15 01:36:00,753 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:00,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297407880] [2019-10-15 01:36:00,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:00,755 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:00,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:01,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297407880] [2019-10-15 01:36:01,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588584406] [2019-10-15 01:36:01,250 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:01,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:36:01,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:01,367 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:02,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132803529] [2019-10-15 01:36:02,076 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:02,076 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:02,076 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:02,077 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:02,077 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:02,110 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:02,237 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:02,249 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:02,253 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:02,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:02,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 58 [2019-10-15 01:36:02,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177274883] [2019-10-15 01:36:02,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-15 01:36:02,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:02,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-15 01:36:02,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1294, Invalid=2012, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 01:36:02,613 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 58 states. [2019-10-15 01:36:06,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:06,699 INFO L93 Difference]: Finished difference Result 306 states and 422 transitions. [2019-10-15 01:36:06,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-15 01:36:06,700 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 34 [2019-10-15 01:36:06,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:06,703 INFO L225 Difference]: With dead ends: 306 [2019-10-15 01:36:06,703 INFO L226 Difference]: Without dead ends: 295 [2019-10-15 01:36:06,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3779, Invalid=8211, Unknown=0, NotChecked=0, Total=11990 [2019-10-15 01:36:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2019-10-15 01:36:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 63. [2019-10-15 01:36:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-15 01:36:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2019-10-15 01:36:06,738 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 34 [2019-10-15 01:36:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:06,738 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2019-10-15 01:36:06,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-15 01:36:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2019-10-15 01:36:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-15 01:36:06,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:06,740 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:06,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:06,962 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash 5118716, now seen corresponding path program 5 times [2019-10-15 01:36:06,963 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:06,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996406478] [2019-10-15 01:36:06,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:06,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:06,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:08,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996406478] [2019-10-15 01:36:08,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843750922] [2019-10-15 01:36:08,224 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