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_two_index_07.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:43,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:43,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:43,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:43,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:43,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:43,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:43,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:43,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:43,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:43,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:43,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:43,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:43,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:43,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:43,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:43,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:43,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:43,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:43,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:43,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:43,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:43,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:43,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:43,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:43,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:43,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:43,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:43,948 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 01:35:43,983 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:43,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:43,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:43,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:43,985 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:43,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:43,986 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:43,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:43,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:43,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:43,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:43,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:43,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:43,991 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:43,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:43,992 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:43,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:43,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:43,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:43,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:43,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:43,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:43,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:43,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:43,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:43,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:43,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:43,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:43,995 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 01:35:44,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:44,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:44,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:44,318 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:44,318 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:44,319 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i [2019-10-15 01:35:44,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/646232bce/9a6902e3486a4449837aff809c7f1a23/FLAG403f748ac [2019-10-15 01:35:44,822 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:44,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_07.i [2019-10-15 01:35:44,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/646232bce/9a6902e3486a4449837aff809c7f1a23/FLAG403f748ac [2019-10-15 01:35:45,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/646232bce/9a6902e3486a4449837aff809c7f1a23 [2019-10-15 01:35:45,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:45,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:45,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:45,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:45,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:45,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c03921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45, skipping insertion in model container [2019-10-15 01:35:45,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,225 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:45,244 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:45,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:45,467 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:45,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:45,508 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:45,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45 WrapperNode [2019-10-15 01:35:45,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:45,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:45,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:45,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:45,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:45,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:45,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:45,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:45,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (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 01:35:45,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:45,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:45,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:45,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:45,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:45,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:45,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:45,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:45,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:45,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:45,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:45,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:45,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:45,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:46,034 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:46,035 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:46,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:46 BoogieIcfgContainer [2019-10-15 01:35:46,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:46,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:46,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:46,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:46,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:45" (1/3) ... [2019-10-15 01:35:46,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177fe66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:46, skipping insertion in model container [2019-10-15 01:35:46,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (2/3) ... [2019-10-15 01:35:46,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177fe66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:46, skipping insertion in model container [2019-10-15 01:35:46,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:46" (3/3) ... [2019-10-15 01:35:46,044 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2019-10-15 01:35:46,053 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:46,060 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:46,069 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:46,090 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:46,090 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:46,090 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:46,091 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:46,091 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:46,091 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:46,091 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:46,091 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:35:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:46,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,111 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,113 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-10-15 01:35:46,126 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107495784] [2019-10-15 01:35:46,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,311 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 01:35:46,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107495784] [2019-10-15 01:35:46,313 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:46,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:46,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065952360] [2019-10-15 01:35:46,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:46,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:46,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:46,339 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:35:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:46,417 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:35:46,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:46,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:35:46,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:46,432 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:35:46,432 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:35:46,438 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 01:35:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:35:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:35:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:35:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:35:46,492 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:35:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:46,493 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:35:46,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:35:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:35:46,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,496 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,496 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1896737256, now seen corresponding path program 1 times [2019-10-15 01:35:46,498 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547061057] [2019-10-15 01:35:46,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,597 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 01:35:46,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547061057] [2019-10-15 01:35:46,598 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:46,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:46,598 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171114796] [2019-10-15 01:35:46,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:46,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:46,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:46,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:46,601 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:35:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:46,644 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 01:35:46,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:46,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:35:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:46,648 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:35:46,648 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:35:46,649 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 01:35:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:35:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-15 01:35:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:35:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:35:46,659 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:35:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:46,660 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:35:46,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:35:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:35:46,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,661 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,661 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-10-15 01:35:46,662 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567638365] [2019-10-15 01:35:46,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:46,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567638365] [2019-10-15 01:35:46,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437688533] [2019-10-15 01:35:46,726 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 01:35:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:46,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:46,859 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:46,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1022960391] [2019-10-15 01:35:46,922 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:46,922 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:46,929 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:46,938 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:46,939 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:47,145 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:47,658 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-10-15 01:35:47,801 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:47,819 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:47,828 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:48,152 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:48,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:35:48,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528513430] [2019-10-15 01:35:48,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:35:48,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:35:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:35:48,160 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-10-15 01:35:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:48,899 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-10-15 01:35:48,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:35:48,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-10-15 01:35:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:48,901 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:35:48,901 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:35:48,903 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:35:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:35:48,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-10-15 01:35:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:35:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:35:48,916 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:35:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:48,916 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:35:48,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:35:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:35:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:35:48,918 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:48,918 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:49,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:49,129 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:49,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:49,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1363999975, now seen corresponding path program 2 times [2019-10-15 01:35:49,130 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:49,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941182170] [2019-10-15 01:35:49,131 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:49,131 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:49,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:49,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941182170] [2019-10-15 01:35:49,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361221966] [2019-10-15 01:35:49,225 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 01:35:49,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:49,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:49,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:35:49,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:49,302 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:49,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443439307] [2019-10-15 01:35:49,343 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:49,343 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:49,344 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:49,344 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:49,344 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:49,384 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:49,678 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:49,688 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:49,694 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:49,977 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:49,977 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-10-15 01:35:49,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630983794] [2019-10-15 01:35:49,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:35:49,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:49,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:35:49,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:35:49,980 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2019-10-15 01:35:50,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:50,929 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-10-15 01:35:50,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:35:50,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-10-15 01:35:50,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:50,931 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:35:50,931 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:35:50,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:35:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:35:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2019-10-15 01:35:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:35:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-15 01:35:50,943 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-10-15 01:35:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:50,943 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-15 01:35:50,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:35:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-15 01:35:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:35:50,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:50,947 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:51,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:51,155 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:51,156 INFO L82 PathProgramCache]: Analyzing trace with hash 311824988, now seen corresponding path program 3 times [2019-10-15 01:35:51,157 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:51,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968604056] [2019-10-15 01:35:51,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:51,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968604056] [2019-10-15 01:35:51,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596972478] [2019-10-15 01:35:51,280 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:51,342 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:51,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:51,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:35:51,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:51,441 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:51,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069184362] [2019-10-15 01:35:51,632 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:51,632 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:51,633 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:51,633 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:51,634 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:51,690 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:52,016 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:52,032 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:52,037 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:52,328 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:52,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 38 [2019-10-15 01:35:52,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565520696] [2019-10-15 01:35:52,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-15 01:35:52,330 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-15 01:35:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:35:52,331 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 38 states. [2019-10-15 01:35:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:54,249 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2019-10-15 01:35:54,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:35:54,249 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 28 [2019-10-15 01:35:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:54,251 INFO L225 Difference]: With dead ends: 109 [2019-10-15 01:35:54,251 INFO L226 Difference]: Without dead ends: 91 [2019-10-15 01:35:54,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1748, Invalid=4894, Unknown=0, NotChecked=0, Total=6642 [2019-10-15 01:35:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-15 01:35:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 52. [2019-10-15 01:35:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-15 01:35:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-10-15 01:35:54,269 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2019-10-15 01:35:54,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:54,269 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-10-15 01:35:54,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-15 01:35:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-10-15 01:35:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-15 01:35:54,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:54,271 INFO L380 BasicCegarLoop]: trace histogram [25, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:54,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:54,475 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:54,476 INFO L82 PathProgramCache]: Analyzing trace with hash 102164889, now seen corresponding path program 4 times [2019-10-15 01:35:54,477 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:54,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428344940] [2019-10-15 01:35:54,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:54,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:54,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-15 01:35:54,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428344940] [2019-10-15 01:35:54,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553102964] [2019-10-15 01:35:54,728 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 01:35:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:54,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-15 01:35:54,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:35:55,117 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:35:55,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17706531] [2019-10-15 01:35:55,714 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:55,714 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:55,715 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:55,715 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:55,715 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:55,742 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:55,999 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:56,007 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:56,010 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:56,282 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:56,282 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 28, 11] total 73 [2019-10-15 01:35:56,282 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626511610] [2019-10-15 01:35:56,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-10-15 01:35:56,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:56,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-10-15 01:35:56,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2102, Invalid=3154, Unknown=0, NotChecked=0, Total=5256 [2019-10-15 01:35:56,288 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 73 states. [2019-10-15 01:36:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:00,976 INFO L93 Difference]: Finished difference Result 167 states and 225 transitions. [2019-10-15 01:36:00,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-10-15 01:36:00,977 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 48 [2019-10-15 01:36:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:00,982 INFO L225 Difference]: With dead ends: 167 [2019-10-15 01:36:00,982 INFO L226 Difference]: Without dead ends: 146 [2019-10-15 01:36:00,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8797 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7432, Invalid=17060, Unknown=0, NotChecked=0, Total=24492 [2019-10-15 01:36:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-15 01:36:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2019-10-15 01:36:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-15 01:36:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2019-10-15 01:36:01,072 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 48 [2019-10-15 01:36:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:01,073 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2019-10-15 01:36:01,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-10-15 01:36:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2019-10-15 01:36:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 01:36:01,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:01,078 INFO L380 BasicCegarLoop]: trace histogram [60, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:01,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:01,283 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:01,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1214782940, now seen corresponding path program 5 times [2019-10-15 01:36:01,284 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:01,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60044932] [2019-10-15 01:36:01,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:01,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:01,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1966 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2019-10-15 01:36:01,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60044932] [2019-10-15 01:36:01,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581899976] [2019-10-15 01:36:01,610 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 01:36:12,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-15 01:36:12,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:12,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-15 01:36:12,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1966 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2019-10-15 01:36:12,497 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1966 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2019-10-15 01:36:12,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1670797343] [2019-10-15 01:36:12,881 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:12,881 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:12,881 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:12,882 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:12,882 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:12,906 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:13,227 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:13,236 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:13,241 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:13,579 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:13,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 11] total 47 [2019-10-15 01:36:13,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058186450] [2019-10-15 01:36:13,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-15 01:36:13,582 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:13,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-15 01:36:13,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=1396, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:36:13,583 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 47 states. [2019-10-15 01:36:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:17,619 INFO L93 Difference]: Finished difference Result 225 states and 277 transitions. [2019-10-15 01:36:17,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-10-15 01:36:17,619 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 88 [2019-10-15 01:36:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:17,622 INFO L225 Difference]: With dead ends: 225 [2019-10-15 01:36:17,622 INFO L226 Difference]: Without dead ends: 216 [2019-10-15 01:36:17,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4035 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4206, Invalid=10556, Unknown=0, NotChecked=0, Total=14762 [2019-10-15 01:36:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-15 01:36:17,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 110. [2019-10-15 01:36:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-15 01:36:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2019-10-15 01:36:17,662 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 88 [2019-10-15 01:36:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:17,663 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2019-10-15 01:36:17,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-15 01:36:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2019-10-15 01:36:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-15 01:36:17,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:17,665 INFO L380 BasicCegarLoop]: trace histogram [60, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:17,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:17,867 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:17,868 INFO L82 PathProgramCache]: Analyzing trace with hash -665238532, now seen corresponding path program 6 times [2019-10-15 01:36:17,868 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:17,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107710847] [2019-10-15 01:36:17,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:17,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:17,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2019-10-15 01:36:18,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107710847] [2019-10-15 01:36:18,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062263769] [2019-10-15 01:36:18,612 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 01:36:18,773 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:18,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:18,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 62 conjunts are in the unsatisfiable core [2019-10-15 01:36:18,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-10-15 01:36:19,231 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-10-15 01:36:22,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317241801] [2019-10-15 01:36:22,211 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:22,211 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:22,211 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:22,212 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:22,212 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:22,239 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:22,493 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:22,499 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:22,502 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:22,888 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:22,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 63, 63, 11] total 161 [2019-10-15 01:36:22,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306616121] [2019-10-15 01:36:22,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 161 states [2019-10-15 01:36:22,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:22,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2019-10-15 01:36:22,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11650, Invalid=14110, Unknown=0, NotChecked=0, Total=25760 [2019-10-15 01:36:22,896 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 161 states.