java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:32:44,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:32:44,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:32:44,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:32:44,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:32:44,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:32:44,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:32:44,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:32:44,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:32:44,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:32:44,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:32:44,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:32:44,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:32:44,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:32:44,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:32:44,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:32:44,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:32:44,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:32:44,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:32:44,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:32:44,766 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 01:32:44,799 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:32:44,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:32:44,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:32:44,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:32:44,802 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:32:44,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:32:44,802 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:32:44,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:32:44,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:32:44,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:32:44,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:32:44,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:32:44,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:32:44,805 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:32:44,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:32:44,805 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:32:44,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:32:44,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:32:44,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:32:44,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:32:44,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:32:44,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:44,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:32:44,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:32:44,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:32:44,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:32:44,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:32:44,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:32:44,807 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 01:32:45,128 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:32:45,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:32:45,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:32:45,152 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:32:45,153 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:32:45,153 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2019-10-15 01:32:45,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64751e82c/db3570c45dd94c5286c78965f762c359/FLAGfb38b588d [2019-10-15 01:32:45,745 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:32:45,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2019-10-15 01:32:45,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64751e82c/db3570c45dd94c5286c78965f762c359/FLAGfb38b588d [2019-10-15 01:32:46,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64751e82c/db3570c45dd94c5286c78965f762c359 [2019-10-15 01:32:46,109 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:32:46,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:32:46,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:46,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:32:46,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:32:46,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:46" (1/1) ... [2019-10-15 01:32:46,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3306400a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46, skipping insertion in model container [2019-10-15 01:32:46,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:46" (1/1) ... [2019-10-15 01:32:46,128 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:32:46,149 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:32:46,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:46,341 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:32:46,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:46,396 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:32:46,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46 WrapperNode [2019-10-15 01:32:46,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:46,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:32:46,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:32:46,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:32:46,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46" (1/1) ... [2019-10-15 01:32:46,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46" (1/1) ... [2019-10-15 01:32:46,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46" (1/1) ... [2019-10-15 01:32:46,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46" (1/1) ... [2019-10-15 01:32:46,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46" (1/1) ... [2019-10-15 01:32:46,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46" (1/1) ... [2019-10-15 01:32:46,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46" (1/1) ... [2019-10-15 01:32:46,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:32:46,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:32:46,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:32:46,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:32:46,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46" (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 01:32:46,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:32:46,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:32:46,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:32:46,604 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:32:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:32:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:32:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:32:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:32:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:32:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:32:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:32:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:32:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:32:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:32:47,222 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:32:47,223 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 01:32:47,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:47 BoogieIcfgContainer [2019-10-15 01:32:47,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:32:47,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:32:47,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:32:47,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:32:47,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:32:46" (1/3) ... [2019-10-15 01:32:47,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78be7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:47, skipping insertion in model container [2019-10-15 01:32:47,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:46" (2/3) ... [2019-10-15 01:32:47,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78be7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:47, skipping insertion in model container [2019-10-15 01:32:47,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:47" (3/3) ... [2019-10-15 01:32:47,234 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2019-10-15 01:32:47,245 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:32:47,255 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:32:47,267 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:32:47,297 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:32:47,298 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:32:47,298 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:32:47,298 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:32:47,298 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:32:47,299 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:32:47,299 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:32:47,299 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:32:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-15 01:32:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:32:47,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:47,330 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:47,332 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:47,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:47,337 INFO L82 PathProgramCache]: Analyzing trace with hash -830930063, now seen corresponding path program 1 times [2019-10-15 01:32:47,345 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:47,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625188720] [2019-10-15 01:32:47,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:47,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:47,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:47,523 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 01:32:47,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625188720] [2019-10-15 01:32:47,525 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:47,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:47,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926277736] [2019-10-15 01:32:47,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:47,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:47,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:47,550 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-10-15 01:32:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:47,598 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2019-10-15 01:32:47,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:47,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-15 01:32:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:47,610 INFO L225 Difference]: With dead ends: 45 [2019-10-15 01:32:47,610 INFO L226 Difference]: Without dead ends: 23 [2019-10-15 01:32:47,614 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 01:32:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-15 01:32:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-15 01:32:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 01:32:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-10-15 01:32:47,660 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 18 [2019-10-15 01:32:47,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:47,661 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-10-15 01:32:47,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-10-15 01:32:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:32:47,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:47,663 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 01:32:47,663 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:47,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:47,664 INFO L82 PathProgramCache]: Analyzing trace with hash 323741192, now seen corresponding path program 1 times [2019-10-15 01:32:47,664 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:47,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133802862] [2019-10-15 01:32:47,665 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:47,665 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:47,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:47,768 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 01:32:47,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133802862] [2019-10-15 01:32:47,769 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:47,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:47,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873740154] [2019-10-15 01:32:47,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:47,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:47,776 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2019-10-15 01:32:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:47,846 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2019-10-15 01:32:47,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:47,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-15 01:32:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:47,848 INFO L225 Difference]: With dead ends: 45 [2019-10-15 01:32:47,848 INFO L226 Difference]: Without dead ends: 30 [2019-10-15 01:32:47,850 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 01:32:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-15 01:32:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-15 01:32:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:32:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-10-15 01:32:47,858 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2019-10-15 01:32:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:47,858 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-10-15 01:32:47,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-10-15 01:32:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:32:47,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:47,860 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] [2019-10-15 01:32:47,860 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash 55637449, now seen corresponding path program 1 times [2019-10-15 01:32:47,861 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:47,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424819423] [2019-10-15 01:32:47,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:47,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:47,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:32:47,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424819423] [2019-10-15 01:32:47,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684744367] [2019-10-15 01:32:47,962 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 01:32:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:48,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:48,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:32:48,142 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:32:48,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405504316] [2019-10-15 01:32:48,245 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:32:48,247 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:48,262 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:48,270 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:48,279 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:48,458 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:50,104 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:50,462 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:50,476 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:50,482 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:50,827 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:50,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:32:50,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872782591] [2019-10-15 01:32:50,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:50,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:50,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:50,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:50,831 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 18 states. [2019-10-15 01:32:51,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:51,689 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2019-10-15 01:32:51,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:51,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2019-10-15 01:32:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:51,691 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:32:51,691 INFO L226 Difference]: Without dead ends: 49 [2019-10-15 01:32:51,692 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-15 01:32:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2019-10-15 01:32:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:32:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-10-15 01:32:51,702 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2019-10-15 01:32:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:51,702 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-10-15 01:32:51,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:32:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-10-15 01:32:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 01:32:51,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:51,704 INFO L380 BasicCegarLoop]: trace histogram [4, 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] [2019-10-15 01:32:51,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:51,909 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:51,910 INFO L82 PathProgramCache]: Analyzing trace with hash -718878255, now seen corresponding path program 2 times [2019-10-15 01:32:51,910 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:51,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915057319] [2019-10-15 01:32:51,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:51,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:51,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:32:52,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915057319] [2019-10-15 01:32:52,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150123407] [2019-10-15 01:32:52,025 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 01:32:52,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:32:52,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:52,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:32:52,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:32:52,148 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:32:52,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377614372] [2019-10-15 01:32:52,188 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:32:52,188 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:52,188 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:52,189 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:52,189 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:52,230 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:53,734 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:53,741 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:53,745 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:54,025 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:54,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 19 [2019-10-15 01:32:54,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720212317] [2019-10-15 01:32:54,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:32:54,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:32:54,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:32:54,031 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 19 states. [2019-10-15 01:32:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:54,826 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2019-10-15 01:32:54,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:54,827 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2019-10-15 01:32:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:54,829 INFO L225 Difference]: With dead ends: 104 [2019-10-15 01:32:54,829 INFO L226 Difference]: Without dead ends: 77 [2019-10-15 01:32:54,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:32:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-15 01:32:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2019-10-15 01:32:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-15 01:32:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-10-15 01:32:54,843 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 36 [2019-10-15 01:32:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:54,843 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-10-15 01:32:54,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:32:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-10-15 01:32:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-15 01:32:54,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:54,845 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:55,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:55,055 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:55,056 INFO L82 PathProgramCache]: Analyzing trace with hash -310643951, now seen corresponding path program 3 times [2019-10-15 01:32:55,056 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:55,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771093143] [2019-10-15 01:32:55,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-15 01:32:55,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771093143] [2019-10-15 01:32:55,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878578740] [2019-10-15 01:32:55,187 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 01:32:55,307 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:55,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:55,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:32:55,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-15 01:32:55,351 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-15 01:32:55,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139971604] [2019-10-15 01:32:55,417 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:32:55,417 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:55,418 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:55,418 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:55,418 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:55,442 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:56,806 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:56,814 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:56,817 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:57,097 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:57,097 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:32:57,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773910206] [2019-10-15 01:32:57,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:32:57,099 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:57,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:32:57,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:32:57,100 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 23 states. [2019-10-15 01:32:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:57,879 INFO L93 Difference]: Finished difference Result 141 states and 162 transitions. [2019-10-15 01:32:57,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:32:57,879 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2019-10-15 01:32:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:57,881 INFO L225 Difference]: With dead ends: 141 [2019-10-15 01:32:57,881 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:32:57,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:32:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:32:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2019-10-15 01:32:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-15 01:32:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2019-10-15 01:32:57,895 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 64 [2019-10-15 01:32:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:57,895 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2019-10-15 01:32:57,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:32:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2019-10-15 01:32:57,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-15 01:32:57,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:57,898 INFO L380 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:58,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:58,111 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:58,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:58,111 INFO L82 PathProgramCache]: Analyzing trace with hash -995152975, now seen corresponding path program 4 times [2019-10-15 01:32:58,111 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:58,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317731094] [2019-10-15 01:32:58,111 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:58,111 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:58,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-15 01:32:58,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317731094] [2019-10-15 01:32:58,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363197345] [2019-10-15 01:32:58,318 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 01:32:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:58,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:32:58,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-15 01:32:58,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-15 01:32:58,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [14620650] [2019-10-15 01:32:58,666 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:32:58,667 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:58,667 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:58,667 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:58,667 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:58,684 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:00,186 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:00,192 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:00,195 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:00,491 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:00,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:33:00,492 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559498495] [2019-10-15 01:33:00,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:00,493 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:00,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:00,494 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 35 states. [2019-10-15 01:33:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:01,713 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2019-10-15 01:33:01,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:01,713 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 70 [2019-10-15 01:33:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:01,715 INFO L225 Difference]: With dead ends: 153 [2019-10-15 01:33:01,715 INFO L226 Difference]: Without dead ends: 95 [2019-10-15 01:33:01,717 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=934, Invalid=3098, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-15 01:33:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2019-10-15 01:33:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-15 01:33:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2019-10-15 01:33:01,730 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 70 [2019-10-15 01:33:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:01,730 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2019-10-15 01:33:01,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2019-10-15 01:33:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-15 01:33:01,732 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:01,732 INFO L380 BasicCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:01,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:01,937 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:01,937 INFO L82 PathProgramCache]: Analyzing trace with hash -192891663, now seen corresponding path program 5 times [2019-10-15 01:33:01,938 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:01,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740978180] [2019-10-15 01:33:01,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:01,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:01,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-15 01:33:02,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740978180] [2019-10-15 01:33:02,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587021812] [2019-10-15 01:33:02,307 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 01:33:03,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:33:03,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:03,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-15 01:33:03,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2019-10-15 01:33:03,819 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-10-15 01:33:03,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700394839] [2019-10-15 01:33:03,963 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:33:03,963 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:03,967 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:03,967 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:03,967 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:03,985 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:05,330 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:05,336 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:05,339 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:05,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:05,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10, 9, 11] total 50 [2019-10-15 01:33:05,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956059513] [2019-10-15 01:33:05,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-15 01:33:05,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:05,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-15 01:33:05,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=1986, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:33:05,734 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 50 states. [2019-10-15 01:33:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:08,454 INFO L93 Difference]: Finished difference Result 210 states and 282 transitions. [2019-10-15 01:33:08,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:33:08,455 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 82 [2019-10-15 01:33:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:08,456 INFO L225 Difference]: With dead ends: 210 [2019-10-15 01:33:08,456 INFO L226 Difference]: Without dead ends: 152 [2019-10-15 01:33:08,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1399, Invalid=7343, Unknown=0, NotChecked=0, Total=8742 [2019-10-15 01:33:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-15 01:33:08,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2019-10-15 01:33:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-15 01:33:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2019-10-15 01:33:08,477 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 82 [2019-10-15 01:33:08,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:08,478 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2019-10-15 01:33:08,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-15 01:33:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2019-10-15 01:33:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-15 01:33:08,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:08,480 INFO L380 BasicCegarLoop]: trace histogram [23, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:08,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:08,684 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash -257703672, now seen corresponding path program 6 times [2019-10-15 01:33:08,685 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:08,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300049630] [2019-10-15 01:33:08,686 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:08,686 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:08,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-10-15 01:33:09,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300049630] [2019-10-15 01:33:09,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214292745] [2019-10-15 01:33:09,214 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 01:33:09,425 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:09,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:09,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 01:33:09,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-10-15 01:33:09,465 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-10-15 01:33:10,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156833367] [2019-10-15 01:33:10,421 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:33:10,421 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:10,422 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:10,422 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:10,422 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:10,440 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:10,959 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:11,757 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:11,978 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:11,983 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:11,986 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:12,451 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:12,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 11] total 61 [2019-10-15 01:33:12,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927385789] [2019-10-15 01:33:12,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 01:33:12,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:12,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 01:33:12,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2356, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 01:33:12,456 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand 61 states. [2019-10-15 01:33:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:15,176 INFO L93 Difference]: Finished difference Result 291 states and 331 transitions. [2019-10-15 01:33:15,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-15 01:33:15,176 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 139 [2019-10-15 01:33:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:15,178 INFO L225 Difference]: With dead ends: 291 [2019-10-15 01:33:15,178 INFO L226 Difference]: Without dead ends: 177 [2019-10-15 01:33:15,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3807, Invalid=9533, Unknown=0, NotChecked=0, Total=13340 [2019-10-15 01:33:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-15 01:33:15,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 168. [2019-10-15 01:33:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-10-15 01:33:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2019-10-15 01:33:15,203 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 139 [2019-10-15 01:33:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:15,203 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2019-10-15 01:33:15,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-15 01:33:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2019-10-15 01:33:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:33:15,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:15,206 INFO L380 BasicCegarLoop]: trace histogram [48, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:15,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:15,411 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:15,412 INFO L82 PathProgramCache]: Analyzing trace with hash -832549679, now seen corresponding path program 7 times [2019-10-15 01:33:15,412 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:15,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321981001] [2019-10-15 01:33:15,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:15,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:15,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-10-15 01:33:16,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321981001] [2019-10-15 01:33:16,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393250768] [2019-10-15 01:33:16,551 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:16,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-15 01:33:16,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-10-15 01:33:16,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-10-15 01:33:19,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727917407] [2019-10-15 01:33:19,432 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:33:19,433 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:19,433 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:19,433 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:19,434 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:19,449 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:20,844 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:20,854 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:20,856 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:21,332 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:21,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51, 11] total 111 [2019-10-15 01:33:21,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698025833] [2019-10-15 01:33:21,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-15 01:33:21,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:21,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-15 01:33:21,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5079, Invalid=7131, Unknown=0, NotChecked=0, Total=12210 [2019-10-15 01:33:21,340 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand 111 states.