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_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:57,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:57,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:57,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:57,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:57,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:57,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:57,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:57,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:57,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:57,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:57,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:57,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:57,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:57,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:57,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:57,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:57,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:57,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:57,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:57,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:57,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:57,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:57,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:57,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:57,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:57,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:57,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:57,604 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 01:31:57,617 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:57,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:57,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:57,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:57,619 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:57,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:57,619 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:57,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:57,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:57,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:57,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:57,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:57,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:57,621 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:57,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:57,621 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:57,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:57,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:57,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:57,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:57,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:57,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:57,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:57,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:57,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:57,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:57,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:57,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:57,624 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 01:31:57,933 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:57,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:57,959 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:57,960 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:57,960 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:57,961 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-10-15 01:31:58,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d91271e49/f29b7cd754d9462d8910c3173c57b2c9/FLAG9fd737199 [2019-10-15 01:31:58,502 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:58,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-10-15 01:31:58,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d91271e49/f29b7cd754d9462d8910c3173c57b2c9/FLAG9fd737199 [2019-10-15 01:31:58,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d91271e49/f29b7cd754d9462d8910c3173c57b2c9 [2019-10-15 01:31:58,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:58,920 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:58,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:58,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:58,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:58,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc525ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58, skipping insertion in model container [2019-10-15 01:31:58,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,940 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:58,959 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:59,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:59,124 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:59,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:59,244 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:59,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59 WrapperNode [2019-10-15 01:31:59,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:59,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:59,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:59,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:59,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59" (1/1) ... [2019-10-15 01:31:59,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59" (1/1) ... [2019-10-15 01:31:59,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59" (1/1) ... [2019-10-15 01:31:59,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59" (1/1) ... [2019-10-15 01:31:59,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59" (1/1) ... [2019-10-15 01:31:59,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59" (1/1) ... [2019-10-15 01:31:59,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59" (1/1) ... [2019-10-15 01:31:59,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:59,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:59,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:59,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:59,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59" (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 01:31:59,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:59,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:59,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:59,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:59,668 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:59,668 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:31:59,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:59 BoogieIcfgContainer [2019-10-15 01:31:59,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:59,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:59,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:59,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:59,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:58" (1/3) ... [2019-10-15 01:31:59,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571a14c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:59, skipping insertion in model container [2019-10-15 01:31:59,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:59" (2/3) ... [2019-10-15 01:31:59,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571a14c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:59, skipping insertion in model container [2019-10-15 01:31:59,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:59" (3/3) ... [2019-10-15 01:31:59,678 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2019-10-15 01:31:59,695 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:59,703 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:59,714 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:59,739 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:59,739 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:59,739 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:59,739 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:59,740 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:59,740 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:59,740 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:59,740 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:31:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:59,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:59,776 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:59,778 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1664756858, now seen corresponding path program 1 times [2019-10-15 01:31:59,790 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:59,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081878678] [2019-10-15 01:31:59,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,791 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:59,940 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 01:31:59,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081878678] [2019-10-15 01:31:59,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:59,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:59,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088499509] [2019-10-15 01:31:59,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:59,950 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:59,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:59,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:59,971 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-15 01:32:00,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:00,019 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2019-10-15 01:32:00,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:00,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:32:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:00,029 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:32:00,030 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:32:00,033 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:32:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:32:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:32:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:32:00,085 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:32:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:00,087 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:32:00,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:32:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:32:00,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:00,090 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:00,090 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1165016204, now seen corresponding path program 1 times [2019-10-15 01:32:00,092 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:00,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216217075] [2019-10-15 01:32:00,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:00,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:00,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:00,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216217075] [2019-10-15 01:32:00,185 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:00,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:00,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700891636] [2019-10-15 01:32:00,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:00,187 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:00,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:00,188 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 3 states. [2019-10-15 01:32:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:00,205 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-15 01:32:00,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:00,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:32:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:00,207 INFO L225 Difference]: With dead ends: 29 [2019-10-15 01:32:00,207 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 01:32:00,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 01:32:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-15 01:32:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:32:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-15 01:32:00,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-10-15 01:32:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:00,218 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-15 01:32:00,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-15 01:32:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:32:00,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:00,221 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:00,221 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash -695054757, now seen corresponding path program 1 times [2019-10-15 01:32:00,222 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:00,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740640402] [2019-10-15 01:32:00,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:00,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:00,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:00,334 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 01:32:00,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740640402] [2019-10-15 01:32:00,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570889637] [2019-10-15 01:32:00,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:00,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:00,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:00,423 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 01:32:00,423 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:00,449 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 01:32:00,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306209928] [2019-10-15 01:32:00,474 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:00,474 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:00,480 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:00,488 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:00,488 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:00,656 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:01,036 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:01,056 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:01,067 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:01,457 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:01,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 18 [2019-10-15 01:32:01,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106235851] [2019-10-15 01:32:01,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:01,460 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:01,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:01,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:01,463 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 18 states. [2019-10-15 01:32:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:02,091 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-10-15 01:32:02,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:32:02,092 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-10-15 01:32:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:02,093 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:32:02,093 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:32:02,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:32:02,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:32:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2019-10-15 01:32:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:32:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-15 01:32:02,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-10-15 01:32:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:02,109 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-15 01:32:02,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:32:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-15 01:32:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:32:02,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:02,112 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:02,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:02,316 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:02,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1936234603, now seen corresponding path program 2 times [2019-10-15 01:32:02,317 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:02,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959744403] [2019-10-15 01:32:02,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:02,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:02,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:02,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959744403] [2019-10-15 01:32:02,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104326769] [2019-10-15 01:32:02,413 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:02,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:32:02,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:02,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:02,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:02,476 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:02,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581509159] [2019-10-15 01:32:02,496 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:02,496 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:02,496 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:02,497 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:02,497 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:02,534 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:02,698 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:02,708 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:02,713 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:03,019 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:03,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 18 [2019-10-15 01:32:03,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068578886] [2019-10-15 01:32:03,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:03,021 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:03,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:03,021 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 18 states. [2019-10-15 01:32:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:03,593 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2019-10-15 01:32:03,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:32:03,594 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2019-10-15 01:32:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:03,595 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:32:03,595 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:32:03,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:32:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:32:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-10-15 01:32:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:32:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-15 01:32:03,603 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2019-10-15 01:32:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:03,603 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-15 01:32:03,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:32:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-15 01:32:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:32:03,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:03,604 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:03,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:03,817 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:03,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:03,819 INFO L82 PathProgramCache]: Analyzing trace with hash 62974394, now seen corresponding path program 3 times [2019-10-15 01:32:03,819 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:03,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527542842] [2019-10-15 01:32:03,820 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:03,820 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:03,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:03,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527542842] [2019-10-15 01:32:03,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369233320] [2019-10-15 01:32:03,934 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:03,981 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:03,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:03,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:32:03,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:04,025 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:04,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1187682078] [2019-10-15 01:32:04,093 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:04,094 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:04,094 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:04,094 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:04,094 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:04,124 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:04,300 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:04,309 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:04,314 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:04,676 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:04,676 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 12] total 28 [2019-10-15 01:32:04,676 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139558394] [2019-10-15 01:32:04,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 01:32:04,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 01:32:04,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:32:04,678 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 28 states. [2019-10-15 01:32:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:05,698 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-15 01:32:05,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:32:05,699 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 21 [2019-10-15 01:32:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:05,700 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:32:05,700 INFO L226 Difference]: Without dead ends: 41 [2019-10-15 01:32:05,702 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=2186, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 01:32:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-15 01:32:05,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2019-10-15 01:32:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:32:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-15 01:32:05,709 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2019-10-15 01:32:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:05,710 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-15 01:32:05,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 01:32:05,710 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-15 01:32:05,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:32:05,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:05,711 INFO L380 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:05,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:05,923 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1767947029, now seen corresponding path program 4 times [2019-10-15 01:32:05,923 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:05,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664656777] [2019-10-15 01:32:05,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:05,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:05,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:32:06,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664656777] [2019-10-15 01:32:06,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250943377] [2019-10-15 01:32:06,049 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:06,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:32:06,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:32:06,149 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:32:06,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588902359] [2019-10-15 01:32:06,403 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:06,404 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:06,405 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:06,405 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:06,405 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:06,437 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:06,611 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:06,620 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:06,624 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:06,997 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:06,998 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 12] total 36 [2019-10-15 01:32:06,998 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249215435] [2019-10-15 01:32:06,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-15 01:32:06,999 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-15 01:32:07,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:32:07,000 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 36 states. [2019-10-15 01:32:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:08,170 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2019-10-15 01:32:08,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-15 01:32:08,171 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 28 [2019-10-15 01:32:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:08,172 INFO L225 Difference]: With dead ends: 69 [2019-10-15 01:32:08,172 INFO L226 Difference]: Without dead ends: 53 [2019-10-15 01:32:08,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=949, Invalid=3341, Unknown=0, NotChecked=0, Total=4290 [2019-10-15 01:32:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-15 01:32:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2019-10-15 01:32:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:32:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-10-15 01:32:08,183 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 28 [2019-10-15 01:32:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:08,183 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-10-15 01:32:08,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-15 01:32:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-10-15 01:32:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-15 01:32:08,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:08,185 INFO L380 BasicCegarLoop]: trace histogram [22, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:08,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:08,389 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:08,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:08,390 INFO L82 PathProgramCache]: Analyzing trace with hash -7782507, now seen corresponding path program 5 times [2019-10-15 01:32:08,390 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:08,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094469007] [2019-10-15 01:32:08,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:08,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:08,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:32:08,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094469007] [2019-10-15 01:32:08,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517955917] [2019-10-15 01:32:08,841 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 01:32:08,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:32:08,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:08,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:32:08,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:09,132 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:09,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140165089] [2019-10-15 01:32:09,324 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:09,324 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:09,325 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:09,325 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:09,330 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:09,358 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:09,489 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:09,499 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:09,502 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:09,991 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:09,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8, 8, 12] total 48 [2019-10-15 01:32:09,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110958329] [2019-10-15 01:32:09,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-15 01:32:09,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:09,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-15 01:32:09,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1832, Unknown=0, NotChecked=0, Total=2256 [2019-10-15 01:32:09,995 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 48 states. [2019-10-15 01:32:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:12,238 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2019-10-15 01:32:12,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-15 01:32:12,243 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 40 [2019-10-15 01:32:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:12,244 INFO L225 Difference]: With dead ends: 77 [2019-10-15 01:32:12,244 INFO L226 Difference]: Without dead ends: 61 [2019-10-15 01:32:12,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1290, Invalid=6900, Unknown=0, NotChecked=0, Total=8190 [2019-10-15 01:32:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-15 01:32:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2019-10-15 01:32:12,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-15 01:32:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-10-15 01:32:12,259 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 40 [2019-10-15 01:32:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:12,259 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-10-15 01:32:12,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-15 01:32:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-10-15 01:32:12,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-15 01:32:12,261 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:12,261 INFO L380 BasicCegarLoop]: trace histogram [23, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:12,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:12,465 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:12,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1950177524, now seen corresponding path program 6 times [2019-10-15 01:32:12,467 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:12,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552499324] [2019-10-15 01:32:12,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:12,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:12,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:32:12,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552499324] [2019-10-15 01:32:12,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350254204] [2019-10-15 01:32:12,984 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 01:32:13,150 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:13,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:13,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 01:32:13,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:32:13,198 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:32:13,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2078056246] [2019-10-15 01:32:13,962 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:13,962 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:13,962 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:13,963 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:13,963 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:13,988 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:14,100 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:14,107 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:14,110 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:14,530 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:14,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 12] total 62 [2019-10-15 01:32:14,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456791814] [2019-10-15 01:32:14,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-10-15 01:32:14,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-10-15 01:32:14,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1309, Invalid=2473, Unknown=0, NotChecked=0, Total=3782 [2019-10-15 01:32:14,535 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 62 states. [2019-10-15 01:32:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:17,126 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2019-10-15 01:32:17,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-10-15 01:32:17,127 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 48 [2019-10-15 01:32:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:17,129 INFO L225 Difference]: With dead ends: 109 [2019-10-15 01:32:17,129 INFO L226 Difference]: Without dead ends: 86 [2019-10-15 01:32:17,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3187 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3822, Invalid=9984, Unknown=0, NotChecked=0, Total=13806 [2019-10-15 01:32:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-15 01:32:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2019-10-15 01:32:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-15 01:32:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2019-10-15 01:32:17,143 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 48 [2019-10-15 01:32:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:17,144 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2019-10-15 01:32:17,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-10-15 01:32:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2019-10-15 01:32:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-15 01:32:17,146 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:17,146 INFO L380 BasicCegarLoop]: trace histogram [48, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:17,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:17,349 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:17,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1289296198, now seen corresponding path program 7 times [2019-10-15 01:32:17,350 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:17,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371061449] [2019-10-15 01:32:17,351 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:17,351 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:17,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:32:18,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371061449] [2019-10-15 01:32:18,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075827449] [2019-10-15 01:32:18,375 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:18,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-15 01:32:18,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:32:18,551 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:32:21,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842624209] [2019-10-15 01:32:21,170 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:21,170 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:21,170 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:21,170 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:21,171 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:21,193 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:21,286 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:21,291 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:21,294 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:21,835 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:21,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51, 12] total 112 [2019-10-15 01:32:21,836 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411025913] [2019-10-15 01:32:21,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-10-15 01:32:21,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:21,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-10-15 01:32:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5084, Invalid=7348, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:32:21,843 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 112 states. [2019-10-15 01:32:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:29,034 INFO L93 Difference]: Finished difference Result 159 states and 212 transitions. [2019-10-15 01:32:29,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-10-15 01:32:29,034 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 73 [2019-10-15 01:32:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:29,036 INFO L225 Difference]: With dead ends: 159 [2019-10-15 01:32:29,036 INFO L226 Difference]: Without dead ends: 136 [2019-10-15 01:32:29,041 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9512 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=15047, Invalid=32259, Unknown=0, NotChecked=0, Total=47306 [2019-10-15 01:32:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-15 01:32:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2019-10-15 01:32:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-15 01:32:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2019-10-15 01:32:29,057 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 73 [2019-10-15 01:32:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:29,057 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2019-10-15 01:32:29,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-10-15 01:32:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2019-10-15 01:32:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:32:29,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:29,060 INFO L380 BasicCegarLoop]: trace histogram [98, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:29,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:29,262 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:29,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1394502662, now seen corresponding path program 8 times [2019-10-15 01:32:29,263 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:29,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10407445] [2019-10-15 01:32:29,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:29,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:29,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4929 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:32:32,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10407445] [2019-10-15 01:32:32,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067387298] [2019-10-15 01:32:32,919 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:33,113 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-15 01:32:33,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:33,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:32:33,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4929 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2019-10-15 01:32:33,711 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4929 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2019-10-15 01:32:34,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129576294] [2019-10-15 01:32:34,397 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:34,397 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:34,397 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:34,397 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:34,398 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:34,416 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:34,525 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:34,531 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:34,539 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:35,467 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:35,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 15, 15, 12] total 138 [2019-10-15 01:32:35,468 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808183076] [2019-10-15 01:32:35,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 138 states [2019-10-15 01:32:35,469 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:35,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2019-10-15 01:32:35,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5461, Invalid=13445, Unknown=0, NotChecked=0, Total=18906 [2019-10-15 01:32:35,472 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 138 states.