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-crafted/mapavg3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:30:35,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:30:35,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:30:35,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:30:35,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:30:35,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:30:35,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:30:35,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:30:35,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:30:35,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:30:35,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:30:35,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:30:35,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:30:35,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:30:35,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:30:35,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:30:35,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:30:35,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:30:35,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:30:35,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:30:35,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:30:35,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:30:35,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:30:35,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:30:35,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:30:35,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:30:35,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:30:35,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:30:35,771 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 [2019-10-13 21:30:35,785 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:30:35,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:30:35,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:30:35,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:30:35,787 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:30:35,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:30:35,787 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:30:35,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:30:35,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:30:35,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:30:35,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:30:35,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:30:35,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:30:35,789 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:30:35,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:30:35,789 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:30:35,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:30:35,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:30:35,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:30:35,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:30:35,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:30:35,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:30:35,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:30:35,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:30:35,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:30:35,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:30:35,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:30:35,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:30:35,792 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 [2019-10-13 21:30:36,094 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:30:36,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:30:36,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:30:36,118 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:30:36,118 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:30:36,119 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg3.i [2019-10-13 21:30:36,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/045238edc/382a3b5fe28c48f58f8807a10018b073/FLAG9273b3545 [2019-10-13 21:30:36,650 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:30:36,651 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg3.i [2019-10-13 21:30:36,658 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/045238edc/382a3b5fe28c48f58f8807a10018b073/FLAG9273b3545 [2019-10-13 21:30:37,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/045238edc/382a3b5fe28c48f58f8807a10018b073 [2019-10-13 21:30:37,074 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:30:37,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:30:37,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:30:37,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:30:37,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:30:37,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b22563b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37, skipping insertion in model container [2019-10-13 21:30:37,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,093 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:30:37,112 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:30:37,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:30:37,313 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:30:37,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:30:37,352 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:30:37,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37 WrapperNode [2019-10-13 21:30:37,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:30:37,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:30:37,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:30:37,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:30:37,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:30:37,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:30:37,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:30:37,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:30:37,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (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 [2019-10-13 21:30:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:30:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:30:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2019-10-13 21:30:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:30:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:30:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:30:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2019-10-13 21:30:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:30:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:30:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:30:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:30:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:30:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:30:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:30:37,940 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:30:37,940 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 21:30:37,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:30:37 BoogieIcfgContainer [2019-10-13 21:30:37,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:30:37,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:30:37,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:30:37,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:30:37,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:30:37" (1/3) ... [2019-10-13 21:30:37,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d72904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:30:37, skipping insertion in model container [2019-10-13 21:30:37,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (2/3) ... [2019-10-13 21:30:37,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d72904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:30:37, skipping insertion in model container [2019-10-13 21:30:37,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:30:37" (3/3) ... [2019-10-13 21:30:37,950 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg3.i [2019-10-13 21:30:37,960 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:30:37,968 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:30:37,978 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:30:38,000 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:30:38,000 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:30:38,000 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:30:38,000 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:30:38,000 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:30:38,001 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:30:38,001 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:30:38,001 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:30:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-13 21:30:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 21:30:38,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:30:38,023 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:30:38,025 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:30:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:30:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1953355565, now seen corresponding path program 1 times [2019-10-13 21:30:38,037 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:30:38,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313629892] [2019-10-13 21:30:38,038 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:38,038 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:38,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:30:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:30:38,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313629892] [2019-10-13 21:30:38,229 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:30:38,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:30:38,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664784606] [2019-10-13 21:30:38,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:30:38,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:30:38,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:30:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:30:38,252 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-13 21:30:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:30:38,294 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-13 21:30:38,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:30:38,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-13 21:30:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:30:38,306 INFO L225 Difference]: With dead ends: 41 [2019-10-13 21:30:38,307 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 21:30:38,311 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 [2019-10-13 21:30:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 21:30:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 21:30:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 21:30:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-13 21:30:38,364 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-13 21:30:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:30:38,365 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-13 21:30:38,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:30:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-13 21:30:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 21:30:38,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:30:38,368 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:30:38,368 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:30:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:30:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1072677037, now seen corresponding path program 1 times [2019-10-13 21:30:38,369 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:30:38,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263485795] [2019-10-13 21:30:38,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:38,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:38,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:30:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:30:38,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263485795] [2019-10-13 21:30:38,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951298645] [2019-10-13 21:30:38,498 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 [2019-10-13 21:30:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:38,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 21:30:38,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:30:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:30:38,645 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:30:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:30:38,690 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:30:38,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-13 21:30:38,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997053220] [2019-10-13 21:30:38,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:30:38,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:30:38,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:30:38,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:30:38,694 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-13 21:30:38,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:30:38,705 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-13 21:30:38,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:30:38,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-13 21:30:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:30:38,707 INFO L225 Difference]: With dead ends: 33 [2019-10-13 21:30:38,708 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 21:30:38,709 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:30:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 21:30:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 21:30:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 21:30:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-13 21:30:38,715 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-13 21:30:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:30:38,716 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-13 21:30:38,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:30:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-13 21:30:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 21:30:38,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:30:38,717 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:30:38,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:30:38,924 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:30:38,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:30:38,925 INFO L82 PathProgramCache]: Analyzing trace with hash 608739335, now seen corresponding path program 1 times [2019-10-13 21:30:38,925 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:30:38,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927839893] [2019-10-13 21:30:38,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:38,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:38,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:30:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:30:39,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927839893] [2019-10-13 21:30:39,063 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:30:39,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:30:39,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410307273] [2019-10-13 21:30:39,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:30:39,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:30:39,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:30:39,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:30:39,067 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-13 21:30:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:30:39,086 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-13 21:30:39,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:30:39,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-13 21:30:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:30:39,088 INFO L225 Difference]: With dead ends: 31 [2019-10-13 21:30:39,088 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 21:30:39,089 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 [2019-10-13 21:30:39,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 21:30:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 21:30:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 21:30:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-13 21:30:39,095 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-13 21:30:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:30:39,097 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-13 21:30:39,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:30:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-13 21:30:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 21:30:39,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:30:39,099 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:30:39,099 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:30:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:30:39,100 INFO L82 PathProgramCache]: Analyzing trace with hash -824983385, now seen corresponding path program 1 times [2019-10-13 21:30:39,100 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:30:39,101 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731042296] [2019-10-13 21:30:39,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:39,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:39,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:30:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:30:39,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731042296] [2019-10-13 21:30:39,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234366828] [2019-10-13 21:30:39,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 21:30:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:39,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:30:39,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:30:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:30:39,330 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:30:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:30:39,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1171727062] [2019-10-13 21:30:39,396 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 21:30:39,396 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:30:39,403 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:30:39,413 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:30:39,413 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:30:39,584 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs