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_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:18,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:18,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:18,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:18,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:18,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:18,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:18,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:18,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:18,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:18,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:18,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:18,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:18,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:18,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:18,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:18,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:18,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:18,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:18,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:18,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:18,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:18,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:18,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:18,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:18,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:18,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:18,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:18,424 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 01:34:18,447 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:18,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:18,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:18,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:18,450 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:18,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:18,450 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:18,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:18,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:18,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:18,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:18,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:18,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:18,452 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:18,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:18,453 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:18,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:18,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:18,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:18,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:18,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:18,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:18,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:18,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:18,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:18,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:18,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:18,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:18,456 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 01:34:18,715 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:18,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:18,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:18,734 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:18,734 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:18,735 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-10-15 01:34:18,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b11810b/e8aadc8bc7ac422385a55e511b9495a3/FLAGd10c46056 [2019-10-15 01:34:19,203 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:19,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-10-15 01:34:19,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b11810b/e8aadc8bc7ac422385a55e511b9495a3/FLAGd10c46056 [2019-10-15 01:34:19,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b11810b/e8aadc8bc7ac422385a55e511b9495a3 [2019-10-15 01:34:19,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:19,640 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:19,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:19,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:19,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:19,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54268d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19, skipping insertion in model container [2019-10-15 01:34:19,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,658 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:19,680 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:19,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:19,933 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:19,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:20,082 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:20,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20 WrapperNode [2019-10-15 01:34:20,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:20,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:20,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:20,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:20,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20" (1/1) ... [2019-10-15 01:34:20,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20" (1/1) ... [2019-10-15 01:34:20,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20" (1/1) ... [2019-10-15 01:34:20,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20" (1/1) ... [2019-10-15 01:34:20,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20" (1/1) ... [2019-10-15 01:34:20,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20" (1/1) ... [2019-10-15 01:34:20,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20" (1/1) ... [2019-10-15 01:34:20,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:20,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:20,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:20,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:20,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:20,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:20,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:20,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:20,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:20,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:20,682 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:20,683 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:34:20,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:20 BoogieIcfgContainer [2019-10-15 01:34:20,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:20,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:20,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:20,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:20,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:19" (1/3) ... [2019-10-15 01:34:20,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1255a985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:20, skipping insertion in model container [2019-10-15 01:34:20,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:20" (2/3) ... [2019-10-15 01:34:20,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1255a985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:20, skipping insertion in model container [2019-10-15 01:34:20,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:20" (3/3) ... [2019-10-15 01:34:20,692 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2019-10-15 01:34:20,702 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:20,710 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:20,722 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:20,747 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:20,747 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:20,747 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:20,747 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:20,747 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:20,748 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:20,748 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:20,748 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-15 01:34:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:34:20,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:20,773 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:20,775 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:20,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1757541528, now seen corresponding path program 1 times [2019-10-15 01:34:20,791 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:20,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754636977] [2019-10-15 01:34:20,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:34:20,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754636977] [2019-10-15 01:34:20,963 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:20,963 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:20,963 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594870276] [2019-10-15 01:34:20,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:20,969 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:20,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:20,987 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-15 01:34:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:21,084 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2019-10-15 01:34:21,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:21,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-15 01:34:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:21,095 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:34:21,095 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:34:21,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:34:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 01:34:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:34:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-10-15 01:34:21,144 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2019-10-15 01:34:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:21,145 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-10-15 01:34:21,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:21,145 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-10-15 01:34:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:34:21,146 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:21,147 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] [2019-10-15 01:34:21,147 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:21,148 INFO L82 PathProgramCache]: Analyzing trace with hash -69039878, now seen corresponding path program 1 times [2019-10-15 01:34:21,148 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:21,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180747417] [2019-10-15 01:34:21,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:21,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:21,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:34:21,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180747417] [2019-10-15 01:34:21,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177396806] [2019-10-15 01:34:21,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:21,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:21,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:34:21,366 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:34:21,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065399036] [2019-10-15 01:34:21,429 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:34:21,429 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:21,435 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:21,443 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:21,444 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:21,626 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:23,155 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:23,172 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:23,178 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:23,848 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:23,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:23,849 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232204662] [2019-10-15 01:34:23,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:23,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:23,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:23,853 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 17 states. [2019-10-15 01:34:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:24,681 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-10-15 01:34:24,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:24,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2019-10-15 01:34:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:24,683 INFO L225 Difference]: With dead ends: 93 [2019-10-15 01:34:24,683 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:34:24,685 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:34:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2019-10-15 01:34:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-15 01:34:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2019-10-15 01:34:24,699 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 28 [2019-10-15 01:34:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:24,699 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2019-10-15 01:34:24,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2019-10-15 01:34:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-15 01:34:24,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:24,701 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:34:24,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:24,907 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:24,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash -384842776, now seen corresponding path program 2 times [2019-10-15 01:34:24,908 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:24,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320118347] [2019-10-15 01:34:24,909 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:24,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:24,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-15 01:34:25,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320118347] [2019-10-15 01:34:25,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57775737] [2019-10-15 01:34:25,041 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:25,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:25,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:25,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:25,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-15 01:34:25,231 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-15 01:34:25,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1800501450] [2019-10-15 01:34:25,288 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:34:25,288 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:25,289 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:25,289 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:25,289 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:25,314 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:26,260 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:26,267 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:26,270 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:27,192 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:27,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:27,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789839646] [2019-10-15 01:34:27,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:27,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:27,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:27,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:27,195 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 23 states. [2019-10-15 01:34:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:28,384 INFO L93 Difference]: Finished difference Result 171 states and 242 transitions. [2019-10-15 01:34:28,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:28,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2019-10-15 01:34:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:28,389 INFO L225 Difference]: With dead ends: 171 [2019-10-15 01:34:28,389 INFO L226 Difference]: Without dead ends: 122 [2019-10-15 01:34:28,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 122 SyntacticMatches, 40 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-15 01:34:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2019-10-15 01:34:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-15 01:34:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2019-10-15 01:34:28,410 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 55 [2019-10-15 01:34:28,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:28,411 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2019-10-15 01:34:28,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:28,411 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2019-10-15 01:34:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:34:28,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:28,415 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:34:28,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:28,620 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:28,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash 471908520, now seen corresponding path program 3 times [2019-10-15 01:34:28,621 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:28,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008502372] [2019-10-15 01:34:28,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-10-15 01:34:28,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008502372] [2019-10-15 01:34:28,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712023072] [2019-10-15 01:34:28,925 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:29,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:29,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:29,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:29,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-10-15 01:34:29,077 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-10-15 01:34:29,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943061703] [2019-10-15 01:34:29,284 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:34:29,284 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:29,285 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:29,285 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:29,285 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:29,316 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:30,046 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:30,053 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:30,056 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:31,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:31,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:31,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080084362] [2019-10-15 01:34:31,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:31,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:31,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:31,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:31,725 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 35 states. [2019-10-15 01:34:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:33,800 INFO L93 Difference]: Finished difference Result 327 states and 452 transitions. [2019-10-15 01:34:33,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:33,800 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 109 [2019-10-15 01:34:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:33,803 INFO L225 Difference]: With dead ends: 327 [2019-10-15 01:34:33,803 INFO L226 Difference]: Without dead ends: 230 [2019-10-15 01:34:33,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 219 SyntacticMatches, 88 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4087 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-10-15 01:34:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2019-10-15 01:34:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-10-15 01:34:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2019-10-15 01:34:33,834 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 109 [2019-10-15 01:34:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:33,834 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2019-10-15 01:34:33,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2019-10-15 01:34:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-15 01:34:33,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:33,839 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:34,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:34,043 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:34,044 INFO L82 PathProgramCache]: Analyzing trace with hash -324154840, now seen corresponding path program 4 times [2019-10-15 01:34:34,044 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:34,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967299307] [2019-10-15 01:34:34,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:34,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:34,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-10-15 01:34:34,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967299307] [2019-10-15 01:34:34,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691663157] [2019-10-15 01:34:34,765 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:34,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:34,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-10-15 01:34:35,035 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-10-15 01:34:35,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830586734] [2019-10-15 01:34:35,854 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:34:35,854 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:35,855 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:35,855 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:35,855 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:35,873 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:36,515 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:36,520 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:36,523 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:40,741 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:40,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:40,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782201414] [2019-10-15 01:34:40,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:40,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:40,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:40,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:40,746 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 59 states. [2019-10-15 01:34:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:45,947 INFO L93 Difference]: Finished difference Result 639 states and 872 transitions. [2019-10-15 01:34:45,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:45,949 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 217 [2019-10-15 01:34:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:45,952 INFO L225 Difference]: With dead ends: 639 [2019-10-15 01:34:45,953 INFO L226 Difference]: Without dead ends: 446 [2019-10-15 01:34:45,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 435 SyntacticMatches, 184 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15817 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2019-10-15 01:34:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 437. [2019-10-15 01:34:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-15 01:34:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 446 transitions. [2019-10-15 01:34:46,005 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 446 transitions. Word has length 217 [2019-10-15 01:34:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:46,005 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 446 transitions. [2019-10-15 01:34:46,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 446 transitions. [2019-10-15 01:34:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2019-10-15 01:34:46,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:46,016 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:46,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:46,229 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:46,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:46,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2107907368, now seen corresponding path program 5 times [2019-10-15 01:34:46,231 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:46,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106698214] [2019-10-15 01:34:46,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:46,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:46,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9729 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 8648 trivial. 0 not checked. [2019-10-15 01:34:48,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106698214] [2019-10-15 01:34:48,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429226751] [2019-10-15 01:34:48,088 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