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_copy9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:16,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:16,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:16,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:16,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:16,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:16,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:16,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:16,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:16,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:16,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:16,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:16,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:16,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:16,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:16,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:16,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:16,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:16,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:16,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:16,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:16,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:16,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:16,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:16,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:16,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:16,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:16,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:16,812 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 01:33:16,826 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:16,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:16,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:16,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:16,828 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:16,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:16,828 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:16,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:16,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:16,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:16,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:16,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:16,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:16,829 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:16,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:16,830 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:16,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:16,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:16,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:16,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:16,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:16,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:16,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:16,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:16,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:16,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:16,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:16,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:16,832 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 01:33:17,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:17,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:17,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:17,126 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:17,126 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:17,127 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2019-10-15 01:33:17,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93b1f526/e9969b4f1131488a912292e0fdeda2dd/FLAG7c4ab4b98 [2019-10-15 01:33:17,641 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:17,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2019-10-15 01:33:17,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93b1f526/e9969b4f1131488a912292e0fdeda2dd/FLAG7c4ab4b98 [2019-10-15 01:33:18,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93b1f526/e9969b4f1131488a912292e0fdeda2dd [2019-10-15 01:33:18,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:18,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:18,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:18,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:18,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:18,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5611840f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18, skipping insertion in model container [2019-10-15 01:33:18,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,050 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:18,068 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:18,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:18,301 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:18,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:18,437 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:18,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18 WrapperNode [2019-10-15 01:33:18,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:18,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:18,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:18,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:18,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:18,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:18,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:18,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:18,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (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 01:33:18,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:18,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:33:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:18,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:19,177 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:19,177 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-15 01:33:19,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:19 BoogieIcfgContainer [2019-10-15 01:33:19,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:19,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:19,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:19,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:19,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:18" (1/3) ... [2019-10-15 01:33:19,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2513ce0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:19, skipping insertion in model container [2019-10-15 01:33:19,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (2/3) ... [2019-10-15 01:33:19,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2513ce0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:19, skipping insertion in model container [2019-10-15 01:33:19,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:19" (3/3) ... [2019-10-15 01:33:19,189 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2019-10-15 01:33:19,199 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:19,207 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:19,219 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:19,245 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:19,246 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:19,246 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:19,246 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:19,246 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:19,247 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:19,247 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:19,247 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-15 01:33:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:33:19,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:19,272 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:19,274 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:19,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1608130408, now seen corresponding path program 1 times [2019-10-15 01:33:19,286 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:19,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543514000] [2019-10-15 01:33:19,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:19,514 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 01:33:19,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543514000] [2019-10-15 01:33:19,517 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:19,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:19,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246940687] [2019-10-15 01:33:19,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:19,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:19,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:19,541 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-15 01:33:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:19,578 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2019-10-15 01:33:19,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:19,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-15 01:33:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:19,589 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:33:19,590 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:33:19,594 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 01:33:19,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:33:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:33:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:33:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2019-10-15 01:33:19,640 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 20 [2019-10-15 01:33:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:19,641 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2019-10-15 01:33:19,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2019-10-15 01:33:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:33:19,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:19,642 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:19,643 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:19,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1792470151, now seen corresponding path program 1 times [2019-10-15 01:33:19,644 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:19,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844485706] [2019-10-15 01:33:19,644 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:19,744 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 01:33:19,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844485706] [2019-10-15 01:33:19,747 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:19,747 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:19,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504227769] [2019-10-15 01:33:19,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:19,750 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:19,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:19,751 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 3 states. [2019-10-15 01:33:19,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:19,828 INFO L93 Difference]: Finished difference Result 51 states and 78 transitions. [2019-10-15 01:33:19,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:19,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-15 01:33:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:19,830 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:33:19,831 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:33:19,832 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 01:33:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:33:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-15 01:33:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:33:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2019-10-15 01:33:19,841 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 21 [2019-10-15 01:33:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:19,841 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2019-10-15 01:33:19,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2019-10-15 01:33:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:33:19,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:19,843 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:19,844 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:19,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1489973918, now seen corresponding path program 1 times [2019-10-15 01:33:19,845 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:19,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421890002] [2019-10-15 01:33:19,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,846 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:33:19,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421890002] [2019-10-15 01:33:19,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543467874] [2019-10-15 01:33:19,984 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 01:33:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:20,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:20,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:33:20,128 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:33:20,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984648221] [2019-10-15 01:33:20,188 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:20,188 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:20,195 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:20,203 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:20,204 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:20,353 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:20,900 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:21,203 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:21,560 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:22,994 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:23,004 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:23,009 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:23,330 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:23,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:33:23,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252742684] [2019-10-15 01:33:23,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:23,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:23,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:23,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:23,335 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 17 states. [2019-10-15 01:33:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:24,044 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2019-10-15 01:33:24,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:24,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2019-10-15 01:33:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:24,046 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:33:24,046 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:33:24,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:33:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-10-15 01:33:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:33:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2019-10-15 01:33:24,058 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 30 [2019-10-15 01:33:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:24,058 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2019-10-15 01:33:24,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2019-10-15 01:33:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:33:24,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:24,060 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:24,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:24,270 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:24,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1082535905, now seen corresponding path program 2 times [2019-10-15 01:33:24,271 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:24,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499088679] [2019-10-15 01:33:24,271 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:24,271 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:24,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:33:24,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499088679] [2019-10-15 01:33:24,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747272986] [2019-10-15 01:33:24,373 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 01:33:24,458 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:33:24,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:24,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:24,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:33:24,481 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:33:24,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424143939] [2019-10-15 01:33:24,512 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:24,512 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:24,515 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:24,516 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:24,516 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:24,541 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:26,500 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:26,512 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:26,515 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:26,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:26,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 01:33:26,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589038767] [2019-10-15 01:33:26,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:33:26,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:26,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:33:26,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:33:26,796 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 21 states. [2019-10-15 01:33:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:27,905 INFO L93 Difference]: Finished difference Result 101 states and 148 transitions. [2019-10-15 01:33:27,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:33:27,906 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2019-10-15 01:33:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:27,907 INFO L225 Difference]: With dead ends: 101 [2019-10-15 01:33:27,907 INFO L226 Difference]: Without dead ends: 74 [2019-10-15 01:33:27,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:33:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-15 01:33:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2019-10-15 01:33:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-15 01:33:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2019-10-15 01:33:27,921 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 33 [2019-10-15 01:33:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:27,921 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2019-10-15 01:33:27,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:33:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2019-10-15 01:33:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-15 01:33:27,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:27,924 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:28,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:28,129 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash -555202041, now seen corresponding path program 3 times [2019-10-15 01:33:28,130 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:28,130 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498867808] [2019-10-15 01:33:28,130 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:28,130 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:28,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:28,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498867808] [2019-10-15 01:33:28,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122593219] [2019-10-15 01:33:28,274 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 01:33:28,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:28,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:28,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:33:28,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:28,404 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:28,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183252813] [2019-10-15 01:33:28,505 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:28,505 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:28,506 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:28,506 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:28,507 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:28,529 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:29,250 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:29,832 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:30,441 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:30,447 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:30,449 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:30,728 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:30,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:33:30,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595318707] [2019-10-15 01:33:30,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:33:30,731 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:33:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:33:30,732 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 25 states. [2019-10-15 01:33:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:31,683 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2019-10-15 01:33:31,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:33:31,684 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2019-10-15 01:33:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:31,685 INFO L225 Difference]: With dead ends: 135 [2019-10-15 01:33:31,685 INFO L226 Difference]: Without dead ends: 81 [2019-10-15 01:33:31,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:33:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-15 01:33:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-10-15 01:33:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-15 01:33:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2019-10-15 01:33:31,711 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 61 [2019-10-15 01:33:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:31,711 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2019-10-15 01:33:31,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:33:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2019-10-15 01:33:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 01:33:31,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:31,716 INFO L380 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:31,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:31,931 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:31,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1224243352, now seen corresponding path program 4 times [2019-10-15 01:33:31,931 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:31,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540213048] [2019-10-15 01:33:31,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:31,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:31,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:32,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540213048] [2019-10-15 01:33:32,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316091832] [2019-10-15 01:33:32,148 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 01:33:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:32,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:33:32,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:32,309 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:32,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546552108] [2019-10-15 01:33:32,540 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:32,540 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:32,540 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:32,541 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:32,541 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:32,561 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:32,809 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:34,322 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:34,331 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:34,355 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:34,646 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:34,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:33:34,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57106890] [2019-10-15 01:33:34,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:33:34,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:34,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:33:34,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:33:34,650 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 39 states. [2019-10-15 01:33:36,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:36,047 INFO L93 Difference]: Finished difference Result 149 states and 182 transitions. [2019-10-15 01:33:36,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:33:36,047 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 68 [2019-10-15 01:33:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:36,049 INFO L225 Difference]: With dead ends: 149 [2019-10-15 01:33:36,049 INFO L226 Difference]: Without dead ends: 95 [2019-10-15 01:33:36,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1244, Invalid=3868, Unknown=0, NotChecked=0, Total=5112 [2019-10-15 01:33:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-15 01:33:36,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2019-10-15 01:33:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-15 01:33:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2019-10-15 01:33:36,066 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 68 [2019-10-15 01:33:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:36,067 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2019-10-15 01:33:36,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:33:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2019-10-15 01:33:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-15 01:33:36,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:36,068 INFO L380 BasicCegarLoop]: trace histogram [26, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:36,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:36,273 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:36,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1549757064, now seen corresponding path program 5 times [2019-10-15 01:33:36,274 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:36,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677745997] [2019-10-15 01:33:36,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:36,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:36,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:36,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677745997] [2019-10-15 01:33:36,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128629986] [2019-10-15 01:33:36,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:37,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:33:37,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:37,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:37,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2019-10-15 01:33:37,173 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2019-10-15 01:33:37,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938599980] [2019-10-15 01:33:37,298 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:37,298 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:37,299 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:37,299 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:37,299 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:37,327 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:39,044 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:39,052 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:39,054 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:39,470 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:39,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7, 7, 11] total 49 [2019-10-15 01:33:39,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724602158] [2019-10-15 01:33:39,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-15 01:33:39,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-15 01:33:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1852, Unknown=0, NotChecked=0, Total=2352 [2019-10-15 01:33:39,474 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 49 states. [2019-10-15 01:33:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:42,316 INFO L93 Difference]: Finished difference Result 204 states and 278 transitions. [2019-10-15 01:33:42,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:33:42,320 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 82 [2019-10-15 01:33:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:42,321 INFO L225 Difference]: With dead ends: 204 [2019-10-15 01:33:42,321 INFO L226 Difference]: Without dead ends: 150 [2019-10-15 01:33:42,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1514, Invalid=7042, Unknown=0, NotChecked=0, Total=8556 [2019-10-15 01:33:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-15 01:33:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 141. [2019-10-15 01:33:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-15 01:33:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2019-10-15 01:33:42,341 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 82 [2019-10-15 01:33:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:42,341 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2019-10-15 01:33:42,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-15 01:33:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2019-10-15 01:33:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 01:33:42,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:42,344 INFO L380 BasicCegarLoop]: trace histogram [27, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:42,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:42,547 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:42,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:42,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1276829511, now seen corresponding path program 6 times [2019-10-15 01:33:42,548 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:42,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545398596] [2019-10-15 01:33:42,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:42,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:42,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-15 01:33:43,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545398596] [2019-10-15 01:33:43,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449988505] [2019-10-15 01:33:43,060 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:43,296 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:43,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:43,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:33:43,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-15 01:33:43,332 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-15 01:33:44,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687126404] [2019-10-15 01:33:44,234 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:44,234 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:44,235 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:44,235 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:44,235 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:44,259 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:45,089 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:45,315 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:46,103 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:46,110 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:46,114 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:46,497 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:46,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:33:46,497 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270676279] [2019-10-15 01:33:46,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-10-15 01:33:46,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:46,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-10-15 01:33:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=2952, Unknown=0, NotChecked=0, Total=4692 [2019-10-15 01:33:46,500 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 69 states. [2019-10-15 01:33:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:49,949 INFO L93 Difference]: Finished difference Result 287 states and 335 transitions. [2019-10-15 01:33:49,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-10-15 01:33:49,953 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 137 [2019-10-15 01:33:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:49,954 INFO L225 Difference]: With dead ends: 287 [2019-10-15 01:33:49,954 INFO L226 Difference]: Without dead ends: 179 [2019-10-15 01:33:49,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5099, Invalid=12193, Unknown=0, NotChecked=0, Total=17292 [2019-10-15 01:33:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-10-15 01:33:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 170. [2019-10-15 01:33:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-10-15 01:33:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 180 transitions. [2019-10-15 01:33:49,979 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 180 transitions. Word has length 137 [2019-10-15 01:33:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:49,979 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 180 transitions. [2019-10-15 01:33:49,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-10-15 01:33:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 180 transitions. [2019-10-15 01:33:49,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:33:49,982 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:49,982 INFO L380 BasicCegarLoop]: trace histogram [56, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:50,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:50,190 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:50,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1152654792, now seen corresponding path program 7 times [2019-10-15 01:33:50,191 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:50,191 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733378242] [2019-10-15 01:33:50,192 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:50,192 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:50,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-15 01:33:51,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733378242] [2019-10-15 01:33:51,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061664993] [2019-10-15 01:33:51,648 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:51,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:33:51,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-15 01:33:51,975 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-15 01:33:55,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358302783] [2019-10-15 01:33:55,425 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:55,425 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:55,426 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:55,426 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:55,426 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:55,451 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:56,295 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:56,625 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41