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_vararg_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:45,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:45,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:45,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:45,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:45,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:45,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:45,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:45,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:45,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:45,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:45,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:45,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:45,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:45,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:45,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:45,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:45,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:45,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:45,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:45,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:45,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:45,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:45,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:45,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:45,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:45,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:45,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:45,972 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 01:35:45,991 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:45,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:45,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:45,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:45,996 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:45,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:45,997 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:45,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:45,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:45,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:45,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:45,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:45,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:46,001 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:46,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:46,002 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:46,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:46,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:46,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:46,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:46,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:46,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:46,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:46,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:46,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:46,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:46,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:46,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:46,004 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 01:35:46,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:46,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:46,290 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:46,292 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:46,293 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:46,293 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_vararg_ground.i [2019-10-15 01:35:46,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d863175fb/b6e05d7297a642eeb3bdeb6dc081419e/FLAGa32f45904 [2019-10-15 01:35:46,783 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:46,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_vararg_ground.i [2019-10-15 01:35:46,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d863175fb/b6e05d7297a642eeb3bdeb6dc081419e/FLAGa32f45904 [2019-10-15 01:35:47,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d863175fb/b6e05d7297a642eeb3bdeb6dc081419e [2019-10-15 01:35:47,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:47,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:47,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:47,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:47,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:47,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:47" (1/1) ... [2019-10-15 01:35:47,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419573bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47, skipping insertion in model container [2019-10-15 01:35:47,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:47" (1/1) ... [2019-10-15 01:35:47,234 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:47,251 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:47,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:47,481 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:47,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:47,527 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:47,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47 WrapperNode [2019-10-15 01:35:47,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:47,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:47,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:47,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:47,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47" (1/1) ... [2019-10-15 01:35:47,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47" (1/1) ... [2019-10-15 01:35:47,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47" (1/1) ... [2019-10-15 01:35:47,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47" (1/1) ... [2019-10-15 01:35:47,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47" (1/1) ... [2019-10-15 01:35:47,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47" (1/1) ... [2019-10-15 01:35:47,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47" (1/1) ... [2019-10-15 01:35:47,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:47,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:47,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:47,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:47,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47" (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 01:35:47,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:47,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:47,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:47,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:47,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:47,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:48,023 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:48,023 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:48,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:48 BoogieIcfgContainer [2019-10-15 01:35:48,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:48,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:48,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:48,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:48,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:47" (1/3) ... [2019-10-15 01:35:48,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6a80e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:48, skipping insertion in model container [2019-10-15 01:35:48,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:47" (2/3) ... [2019-10-15 01:35:48,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6a80e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:48, skipping insertion in model container [2019-10-15 01:35:48,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:48" (3/3) ... [2019-10-15 01:35:48,036 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_vararg_ground.i [2019-10-15 01:35:48,045 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:48,052 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:48,063 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:48,087 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:48,087 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:48,087 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:48,087 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:48,088 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:48,088 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:48,088 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:48,088 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:35:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:35:48,109 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:48,110 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:48,112 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash -226467410, now seen corresponding path program 1 times [2019-10-15 01:35:48,127 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:48,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387207575] [2019-10-15 01:35:48,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:48,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:48,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:48,249 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 01:35:48,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387207575] [2019-10-15 01:35:48,251 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:48,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:35:48,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878358248] [2019-10-15 01:35:48,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:35:48,257 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:48,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:35:48,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:35:48,276 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-15 01:35:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:48,299 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-10-15 01:35:48,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:35:48,300 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-10-15 01:35:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:48,309 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:35:48,309 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:35:48,313 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:35:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:35:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:35:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:35:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:35:48,354 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:35:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:48,354 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:35:48,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:35:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:35:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:35:48,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:48,356 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:48,357 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash 972942376, now seen corresponding path program 1 times [2019-10-15 01:35:48,358 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:48,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287608116] [2019-10-15 01:35:48,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:48,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:48,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:48,446 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 01:35:48,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287608116] [2019-10-15 01:35:48,447 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:48,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:48,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776167455] [2019-10-15 01:35:48,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:48,450 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:48,451 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 3 states. [2019-10-15 01:35:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:48,477 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-10-15 01:35:48,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:48,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:35:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:48,478 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:35:48,479 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 01:35:48,480 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 01:35:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 01:35:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-15 01:35:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:35:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-15 01:35:48,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-10-15 01:35:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:48,491 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-15 01:35:48,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-15 01:35:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:35:48,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:48,492 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:48,493 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2103799838, now seen corresponding path program 1 times [2019-10-15 01:35:48,494 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:48,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768570887] [2019-10-15 01:35:48,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:48,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:48,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:48,573 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 01:35:48,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768570887] [2019-10-15 01:35:48,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815361861] [2019-10-15 01:35:48,575 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 01:35:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:48,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:48,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:48,681 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 01:35:48,681 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:48,731 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 01:35:48,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619278750] [2019-10-15 01:35:48,758 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:35:48,759 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:48,767 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:48,775 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:48,776 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:48,945 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:49,249 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:35:49,284 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:49,299 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:49,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:49,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 13] total 19 [2019-10-15 01:35:49,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034351992] [2019-10-15 01:35:49,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:35:49,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:35:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:35:49,743 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 19 states. [2019-10-15 01:35:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:50,867 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-10-15 01:35:50,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:35:50,868 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2019-10-15 01:35:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:50,869 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:35:50,869 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:35:50,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:35:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:35:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2019-10-15 01:35:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:35:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-15 01:35:50,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-10-15 01:35:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:50,877 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-15 01:35:50,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:35:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-15 01:35:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:35:50,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:50,879 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:51,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:51,085 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1715848792, now seen corresponding path program 2 times [2019-10-15 01:35:51,086 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:51,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819441606] [2019-10-15 01:35:51,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:51,175 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 01:35:51,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819441606] [2019-10-15 01:35:51,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916813991] [2019-10-15 01:35:51,176 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 01:35:51,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-10-15 01:35:51,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:51,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:51,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:51,245 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:51,265 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:35:51,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2019-10-15 01:35:51,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892621744] [2019-10-15 01:35:51,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:35:51,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:51,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:35:51,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:35:51,268 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2019-10-15 01:35:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:51,288 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2019-10-15 01:35:51,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:35:51,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-15 01:35:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:51,290 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:35:51,293 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:35:51,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:35:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:35:51,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:35:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:35:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:35:51,303 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2019-10-15 01:35:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:51,305 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:35:51,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:35:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:35:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:35:51,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:51,306 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:51,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:51,508 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2017594605, now seen corresponding path program 1 times [2019-10-15 01:35:51,509 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:51,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208104182] [2019-10-15 01:35:51,510 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,510 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:35:51,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208104182] [2019-10-15 01:35:51,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153303703] [2019-10-15 01:35:51,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:35:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:51,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:35:51,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:35:51,669 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:35:51,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039768707] [2019-10-15 01:35:51,749 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:35:51,749 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:51,749 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:51,750 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:51,750 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:51,807 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:51,956 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:35:51,984 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:51,990 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:52,367 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:52,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 13] total 25 [2019-10-15 01:35:52,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514517492] [2019-10-15 01:35:52,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:35:52,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:35:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:35:52,370 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 25 states. [2019-10-15 01:35:53,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:53,217 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2019-10-15 01:35:53,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:35:53,218 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 20 [2019-10-15 01:35:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:53,219 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:35:53,219 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:35:53,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:35:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:35:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2019-10-15 01:35:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:35:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-10-15 01:35:53,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 20 [2019-10-15 01:35:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:53,228 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-10-15 01:35:53,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:35:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-10-15 01:35:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:35:53,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:53,229 INFO L380 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:53,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:53,439 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash 174016813, now seen corresponding path program 2 times [2019-10-15 01:35:53,440 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:53,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189304101] [2019-10-15 01:35:53,441 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:53,441 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:53,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:35:53,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189304101] [2019-10-15 01:35:53,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777965023] [2019-10-15 01:35:53,597 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 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 01:35:53,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:35:53,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:53,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:35:53,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:53,776 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:53,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57766888] [2019-10-15 01:35:53,932 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:35:53,933 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:53,933 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:53,934 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:53,934 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:53,984 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:54,101 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:35:54,114 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:54,121 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:54,748 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:54,749 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 13] total 38 [2019-10-15 01:35:54,749 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573916207] [2019-10-15 01:35:54,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-15 01:35:54,750 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-15 01:35:54,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:35:54,752 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 38 states. [2019-10-15 01:35:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:56,231 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2019-10-15 01:35:56,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:35:56,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 26 [2019-10-15 01:35:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:56,233 INFO L225 Difference]: With dead ends: 52 [2019-10-15 01:35:56,233 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:35:56,235 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=455, Invalid=3205, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 01:35:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:35:56,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-10-15 01:35:56,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:35:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-10-15 01:35:56,250 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 26 [2019-10-15 01:35:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:56,251 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-10-15 01:35:56,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-15 01:35:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-10-15 01:35:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:35:56,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:56,252 INFO L380 BasicCegarLoop]: trace histogram [11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:56,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:56,456 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:56,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:56,457 INFO L82 PathProgramCache]: Analyzing trace with hash 734264083, now seen corresponding path program 1 times [2019-10-15 01:35:56,457 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:56,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048521770] [2019-10-15 01:35:56,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:35:56,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048521770] [2019-10-15 01:35:56,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099168578] [2019-10-15 01:35:56,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:35:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:56,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:35:56,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:35:56,697 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:35:56,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [36984350] [2019-10-15 01:35:56,928 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:35:56,928 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:56,929 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:56,929 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:56,929 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:56,957 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:57,189 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:57,201 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:57,205 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:57,788 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:57,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 15] total 41 [2019-10-15 01:35:57,789 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479830100] [2019-10-15 01:35:57,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-15 01:35:57,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:57,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-15 01:35:57,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:35:57,791 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 41 states. [2019-10-15 01:35:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:59,253 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2019-10-15 01:35:59,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-15 01:35:59,254 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 34 [2019-10-15 01:35:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:59,258 INFO L225 Difference]: With dead ends: 70 [2019-10-15 01:35:59,258 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:35:59,260 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1138, Invalid=4562, Unknown=0, NotChecked=0, Total=5700 [2019-10-15 01:35:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:35:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 01:35:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:35:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-10-15 01:35:59,273 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 34 [2019-10-15 01:35:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:59,273 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-10-15 01:35:59,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-15 01:35:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-10-15 01:35:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-15 01:35:59,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:59,275 INFO L380 BasicCegarLoop]: trace histogram [24, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:59,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:59,488 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:59,489 INFO L82 PathProgramCache]: Analyzing trace with hash -969830519, now seen corresponding path program 2 times [2019-10-15 01:35:59,489 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:59,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830840343] [2019-10-15 01:35:59,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:59,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:59,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 2 proven. 300 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:35:59,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830840343] [2019-10-15 01:35:59,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415097704] [2019-10-15 01:35:59,905 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 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 01:35:59,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:35:59,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:59,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:35:59,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-10-15 01:36:00,067 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-10-15 01:36:00,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838316027] [2019-10-15 01:36:00,153 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:36:00,154 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:00,154 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:00,154 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:00,155 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:00,183 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:00,362 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:36:00,374 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:00,378 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:00,991 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:00,991 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 6, 6, 15] total 47 [2019-10-15 01:36:00,991 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257287122] [2019-10-15 01:36:00,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-15 01:36:00,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:00,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-15 01:36:00,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1747, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:36:00,995 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 47 states. [2019-10-15 01:36:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:03,676 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2019-10-15 01:36:03,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-10-15 01:36:03,676 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2019-10-15 01:36:03,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:03,678 INFO L225 Difference]: With dead ends: 78 [2019-10-15 01:36:03,678 INFO L226 Difference]: Without dead ends: 53 [2019-10-15 01:36:03,682 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1403, Invalid=7153, Unknown=0, NotChecked=0, Total=8556 [2019-10-15 01:36:03,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-15 01:36:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-15 01:36:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-15 01:36:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-10-15 01:36:03,702 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 47 [2019-10-15 01:36:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:03,704 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-10-15 01:36:03,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-15 01:36:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-10-15 01:36:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-15 01:36:03,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:03,706 INFO L380 BasicCegarLoop]: trace histogram [25, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:03,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:03,920 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:03,920 INFO L82 PathProgramCache]: Analyzing trace with hash 204161582, now seen corresponding path program 3 times [2019-10-15 01:36:03,921 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:03,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167450834] [2019-10-15 01:36:03,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:03,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:03,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 2 proven. 325 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:36:04,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167450834] [2019-10-15 01:36:04,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052926323] [2019-10-15 01:36:04,264 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 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 01:36:04,361 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:04,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:04,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-15 01:36:04,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:36:04,392 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 2 proven. 325 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:36:05,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702689736] [2019-10-15 01:36:05,227 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:36:05,227 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:05,228 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:05,228 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:05,228 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:05,265 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:05,431 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:36:05,442 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:05,446 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:05,940 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:05,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 15] total 69 [2019-10-15 01:36:05,940 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301705819] [2019-10-15 01:36:05,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-10-15 01:36:05,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:05,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-10-15 01:36:05,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1529, Invalid=3163, Unknown=0, NotChecked=0, Total=4692 [2019-10-15 01:36:05,947 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 69 states. [2019-10-15 01:36:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:09,037 INFO L93 Difference]: Finished difference Result 102 states and 132 transitions. [2019-10-15 01:36:09,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-10-15 01:36:09,038 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 50 [2019-10-15 01:36:09,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:09,039 INFO L225 Difference]: With dead ends: 102 [2019-10-15 01:36:09,039 INFO L226 Difference]: Without dead ends: 80 [2019-10-15 01:36:09,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4268 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4484, Invalid=12808, Unknown=0, NotChecked=0, Total=17292 [2019-10-15 01:36:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-15 01:36:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-10-15 01:36:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-15 01:36:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2019-10-15 01:36:09,057 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 50 [2019-10-15 01:36:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:09,057 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2019-10-15 01:36:09,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-10-15 01:36:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2019-10-15 01:36:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:36:09,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:09,059 INFO L380 BasicCegarLoop]: trace histogram [52, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:09,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:09,268 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash 545033060, now seen corresponding path program 4 times [2019-10-15 01:36:09,269 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:09,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598828746] [2019-10-15 01:36:09,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:09,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:09,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 2 proven. 1378 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:36:10,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598828746] [2019-10-15 01:36:10,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085644998] [2019-10-15 01:36:10,485 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:10,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 54 conjunts are in the unsatisfiable core [2019-10-15 01:36:10,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:36:10,663 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 2 proven. 1378 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:36:13,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889399313] [2019-10-15 01:36:13,860 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:36:13,860 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:13,860 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:13,861 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:13,861 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:13,889 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:14,032 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:36:14,040 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:14,043 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:14,764 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:14,764 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55, 15] total 123 [2019-10-15 01:36:14,765 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538012222] [2019-10-15 01:36:14,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 123 states [2019-10-15 01:36:14,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:14,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2019-10-15 01:36:14,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5930, Invalid=9076, Unknown=0, NotChecked=0, Total=15006 [2019-10-15 01:36:14,772 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 123 states. [2019-10-15 01:36:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:23,710 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2019-10-15 01:36:23,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2019-10-15 01:36:23,710 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 77 [2019-10-15 01:36:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:23,712 INFO L225 Difference]: With dead ends: 156 [2019-10-15 01:36:23,712 INFO L226 Difference]: Without dead ends: 134 [2019-10-15 01:36:23,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12152 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=17579, Invalid=39781, Unknown=0, NotChecked=0, Total=57360 [2019-10-15 01:36:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-15 01:36:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2019-10-15 01:36:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-15 01:36:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2019-10-15 01:36:23,740 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 77 [2019-10-15 01:36:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:23,741 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2019-10-15 01:36:23,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 123 states. [2019-10-15 01:36:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2019-10-15 01:36:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:36:23,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:23,743 INFO L380 BasicCegarLoop]: trace histogram [106, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:23,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:23,948 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash 443004196, now seen corresponding path program 5 times [2019-10-15 01:36:23,949 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:23,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116954491] [2019-10-15 01:36:23,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:23,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:23,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 2 proven. 5671 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:36:28,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116954491] [2019-10-15 01:36:28,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54521981] [2019-10-15 01:36:28,342 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:28,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:36:28,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:28,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-15 01:36:28,493 INFO L279 TraceCheckSpWp]: Computing forward predicates...