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_init3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:58,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:58,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:58,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:58,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:58,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:58,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:58,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:58,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:58,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:58,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:58,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:58,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:58,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:58,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:58,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:58,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:58,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:58,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:58,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:58,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:58,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:58,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:58,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:58,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:58,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:58,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:58,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:58,644 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 01:33:58,669 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:58,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:58,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:58,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:58,672 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:58,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:58,673 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:58,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:58,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:58,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:58,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:58,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:58,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:58,676 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:58,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:58,676 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:58,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:58,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:58,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:58,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:58,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:58,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:58,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:58,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:58,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:58,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:58,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:58,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:58,679 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 01:33:58,990 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:59,003 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:59,006 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:59,008 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:59,008 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:59,009 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-2.i [2019-10-15 01:33:59,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d265d86/76bcb6a79ae84b0b855cfd7e1ecb91bb/FLAGd35556ed6 [2019-10-15 01:33:59,544 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:59,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init3_ground-2.i [2019-10-15 01:33:59,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d265d86/76bcb6a79ae84b0b855cfd7e1ecb91bb/FLAGd35556ed6 [2019-10-15 01:33:59,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d265d86/76bcb6a79ae84b0b855cfd7e1ecb91bb [2019-10-15 01:33:59,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:59,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:59,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:59,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:59,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:59,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:59" (1/1) ... [2019-10-15 01:33:59,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@354e775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:59, skipping insertion in model container [2019-10-15 01:33:59,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:59" (1/1) ... [2019-10-15 01:33:59,973 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:59,996 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:00,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:00,240 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:00,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:00,283 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:00,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00 WrapperNode [2019-10-15 01:34:00,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:00,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:00,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:00,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:00,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:00,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:00,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:00,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:00,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (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 01:34:00,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:00,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:00,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:00,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:00,904 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:00,905 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:34:00,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:00 BoogieIcfgContainer [2019-10-15 01:34:00,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:00,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:00,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:00,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:00,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:59" (1/3) ... [2019-10-15 01:34:00,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345b7bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:00, skipping insertion in model container [2019-10-15 01:34:00,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (2/3) ... [2019-10-15 01:34:00,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345b7bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:00, skipping insertion in model container [2019-10-15 01:34:00,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:00" (3/3) ... [2019-10-15 01:34:00,913 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-2.i [2019-10-15 01:34:00,922 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:00,928 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:00,939 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:00,965 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:00,965 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:00,966 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:00,966 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:00,966 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:00,966 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:00,967 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:00,967 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:34:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:34:00,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:00,992 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:00,993 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:00,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:00,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1905658029, now seen corresponding path program 1 times [2019-10-15 01:34:01,006 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:01,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643206619] [2019-10-15 01:34:01,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:01,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:01,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:01,210 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 01:34:01,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643206619] [2019-10-15 01:34:01,212 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:01,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:01,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841668730] [2019-10-15 01:34:01,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:01,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:01,237 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:34:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:01,320 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-10-15 01:34:01,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:01,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:34:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:01,336 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:34:01,336 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:34:01,342 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 01:34:01,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:34:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:34:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:34:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 01:34:01,400 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-10-15 01:34:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:01,401 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 01:34:01,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 01:34:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:34:01,404 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:01,404 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:01,405 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1984082666, now seen corresponding path program 1 times [2019-10-15 01:34:01,406 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:01,407 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795519933] [2019-10-15 01:34:01,407 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:01,407 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:01,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:34:01,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795519933] [2019-10-15 01:34:01,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436111017] [2019-10-15 01:34:01,544 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 01:34:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:01,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:01,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:34:01,643 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:34:01,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1202808073] [2019-10-15 01:34:01,703 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:34:01,703 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:01,710 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:01,719 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:01,720 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:01,886 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:02,640 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:02,656 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:02,663 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:03,199 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:03,199 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:03,199 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92481689] [2019-10-15 01:34:03,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:03,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:03,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:03,206 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 17 states. [2019-10-15 01:34:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:03,996 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2019-10-15 01:34:03,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:03,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-10-15 01:34:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:03,998 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:34:03,998 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:34:03,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:34:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2019-10-15 01:34:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:34:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-15 01:34:04,008 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2019-10-15 01:34:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:04,008 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-15 01:34:04,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:04,009 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-15 01:34:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:34:04,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:04,010 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:04,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:04,216 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1492132205, now seen corresponding path program 2 times [2019-10-15 01:34:04,218 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:04,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236644141] [2019-10-15 01:34:04,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:04,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:04,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:34:04,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236644141] [2019-10-15 01:34:04,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445778529] [2019-10-15 01:34:04,347 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 01:34:04,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:04,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:04,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:04,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:34:04,434 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:34:04,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002509585] [2019-10-15 01:34:04,510 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:34:04,510 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:04,511 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:04,511 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:04,511 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:04,548 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:05,038 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:05,054 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:05,060 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:05,641 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:05,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:05,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491017737] [2019-10-15 01:34:05,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:05,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:05,644 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 23 states. [2019-10-15 01:34:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:06,685 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2019-10-15 01:34:06,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:06,686 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2019-10-15 01:34:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:06,688 INFO L225 Difference]: With dead ends: 75 [2019-10-15 01:34:06,689 INFO L226 Difference]: Without dead ends: 56 [2019-10-15 01:34:06,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-15 01:34:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-15 01:34:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-15 01:34:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-10-15 01:34:06,702 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2019-10-15 01:34:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:06,702 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-10-15 01:34:06,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-10-15 01:34:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:34:06,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:06,704 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:06,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:06,910 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:06,911 INFO L82 PathProgramCache]: Analyzing trace with hash -776537459, now seen corresponding path program 3 times [2019-10-15 01:34:06,911 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:06,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105236301] [2019-10-15 01:34:06,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:06,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:06,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 01:34:07,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105236301] [2019-10-15 01:34:07,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2939126] [2019-10-15 01:34:07,106 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 01:34:07,196 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:07,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:07,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:07,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 01:34:07,229 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 01:34:07,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796329466] [2019-10-15 01:34:07,489 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:34:07,490 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:07,490 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:07,490 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:07,491 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:07,523 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:07,900 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:07,908 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:07,912 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:08,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:08,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:08,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655104786] [2019-10-15 01:34:08,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:08,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:08,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:08,786 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 35 states. [2019-10-15 01:34:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:10,818 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2019-10-15 01:34:10,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:10,819 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-10-15 01:34:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:10,821 INFO L225 Difference]: With dead ends: 123 [2019-10-15 01:34:10,822 INFO L226 Difference]: Without dead ends: 92 [2019-10-15 01:34:10,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 87 SyntacticMatches, 22 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-15 01:34:10,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-10-15 01:34:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:34:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2019-10-15 01:34:10,842 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 43 [2019-10-15 01:34:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:10,842 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2019-10-15 01:34:10,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2019-10-15 01:34:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-15 01:34:10,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:10,845 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:11,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:11,056 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:11,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1525888205, now seen corresponding path program 4 times [2019-10-15 01:34:11,057 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:11,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842576160] [2019-10-15 01:34:11,058 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,058 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 01:34:11,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842576160] [2019-10-15 01:34:11,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391314379] [2019-10-15 01:34:11,536 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 01:34:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:11,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:11,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 01:34:11,673 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 01:34:12,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501484452] [2019-10-15 01:34:12,698 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:34:12,698 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:12,699 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:12,699 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:12,699 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:12,729 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:13,059 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:13,072 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:13,077 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:14,772 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:14,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:14,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998736335] [2019-10-15 01:34:14,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:14,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:14,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:14,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:14,780 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 59 states. [2019-10-15 01:34:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:18,974 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2019-10-15 01:34:18,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:18,975 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 79 [2019-10-15 01:34:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:18,978 INFO L225 Difference]: With dead ends: 219 [2019-10-15 01:34:18,978 INFO L226 Difference]: Without dead ends: 164 [2019-10-15 01:34:18,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 159 SyntacticMatches, 46 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6019 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:18,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-15 01:34:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2019-10-15 01:34:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-15 01:34:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2019-10-15 01:34:19,038 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 79 [2019-10-15 01:34:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:19,039 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2019-10-15 01:34:19,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:19,039 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2019-10-15 01:34:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 01:34:19,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:19,053 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:19,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:19,258 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:19,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1051866803, now seen corresponding path program 5 times [2019-10-15 01:34:19,259 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:19,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139773350] [2019-10-15 01:34:19,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:19,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:19,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-10-15 01:34:20,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139773350] [2019-10-15 01:34:20,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55272884] [2019-10-15 01:34:20,897 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