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 0.1.24-13a467a-m [2019-10-15 01:29:41,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:29:41,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:29:41,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:29:41,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:29:41,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:29:41,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:29:41,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:29:41,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:29:41,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:29:41,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:29:41,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:29:41,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:29:41,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:29:41,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:29:41,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:29:41,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:29:41,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:29:41,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:29:41,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:29:41,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:29:41,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:29:41,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:29:41,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:29:41,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:29:41,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:29:41,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:29:41,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:29:41,211 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 01:29:41,226 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:29:41,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:29:41,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:29:41,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:29:41,230 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:29:41,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:29:41,230 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:29:41,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:29:41,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:29:41,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:29:41,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:29:41,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:29:41,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:29:41,232 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:29:41,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:29:41,232 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:29:41,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:29:41,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:29:41,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:29:41,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:29:41,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:29:41,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:29:41,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:29:41,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:29:41,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:29:41,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:29:41,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:29:41,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:29:41,237 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 01:29:41,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:29:41,547 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:29:41,550 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:29:41,552 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:29:41,553 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:29:41,553 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg3.i [2019-10-15 01:29:41,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce78cfb3a/9dd812f3f4d848a498f86d719c24653e/FLAG761432457 [2019-10-15 01:29:42,127 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:29:42,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg3.i [2019-10-15 01:29:42,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce78cfb3a/9dd812f3f4d848a498f86d719c24653e/FLAG761432457 [2019-10-15 01:29:42,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce78cfb3a/9dd812f3f4d848a498f86d719c24653e [2019-10-15 01:29:42,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:29:42,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:29:42,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:29:42,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:29:42,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:29:42,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cca5a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42, skipping insertion in model container [2019-10-15 01:29:42,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,578 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:29:42,598 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:29:42,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:29:42,792 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:29:42,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:29:42,828 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:29:42,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42 WrapperNode [2019-10-15 01:29:42,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:29:42,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:29:42,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:29:42,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:29:42,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:29:42,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:29:42,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:29:42,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:29:42,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (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 01:29:43,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:29:43,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:29:43,008 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2019-10-15 01:29:43,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:29:43,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:29:43,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:29:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2019-10-15 01:29:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:29:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:29:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:29:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:29:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:29:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:29:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:29:43,438 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:29:43,439 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:29:43,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:29:43 BoogieIcfgContainer [2019-10-15 01:29:43,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:29:43,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:29:43,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:29:43,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:29:43,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:29:42" (1/3) ... [2019-10-15 01:29:43,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef8bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:29:43, skipping insertion in model container [2019-10-15 01:29:43,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (2/3) ... [2019-10-15 01:29:43,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef8bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:29:43, skipping insertion in model container [2019-10-15 01:29:43,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:29:43" (3/3) ... [2019-10-15 01:29:43,449 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg3.i [2019-10-15 01:29:43,459 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:29:43,468 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:29:43,479 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:29:43,501 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:29:43,501 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:29:43,501 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:29:43,502 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:29:43,502 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:29:43,502 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:29:43,502 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:29:43,502 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:29:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:29:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:29:43,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:43,527 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] [2019-10-15 01:29:43,529 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:43,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1953355565, now seen corresponding path program 1 times [2019-10-15 01:29:43,541 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:43,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938760966] [2019-10-15 01:29:43,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:29:43,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938760966] [2019-10-15 01:29:43,731 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:29:43,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:29:43,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699894504] [2019-10-15 01:29:43,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:29:43,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:43,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:29:43,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:29:43,756 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:29:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:43,822 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 01:29:43,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:29:43,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 01:29:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:43,836 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:29:43,836 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:29:43,843 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 01:29:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:29:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:29:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:29:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:29:43,901 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 01:29:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:43,903 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:29:43,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:29:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:29:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:29:43,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:43,909 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] [2019-10-15 01:29:43,909 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1072677037, now seen corresponding path program 1 times [2019-10-15 01:29:43,911 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:43,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219232405] [2019-10-15 01:29:43,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:29:44,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219232405] [2019-10-15 01:29:44,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508092801] [2019-10-15 01:29:44,030 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 01:29:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:29:44,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:29:44,147 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:29:44,185 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:29:44,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:29:44,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828144915] [2019-10-15 01:29:44,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:29:44,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:44,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:29:44,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:29:44,189 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:29:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:44,201 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 01:29:44,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:29:44,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 01:29:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:44,203 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:29:44,203 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:29:44,204 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 [2019-10-15 01:29:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:29:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:29:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:29:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:29:44,210 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 01:29:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:44,211 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:29:44,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:29:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:29:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:29:44,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:44,213 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] [2019-10-15 01:29:44,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:44,420 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash 608739335, now seen corresponding path program 1 times [2019-10-15 01:29:44,421 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:44,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045108505] [2019-10-15 01:29:44,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:29:44,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045108505] [2019-10-15 01:29:44,509 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:29:44,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:29:44,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293863199] [2019-10-15 01:29:44,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:29:44,511 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:44,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:29:44,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:29:44,512 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 01:29:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:44,530 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:29:44,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:29:44,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 01:29:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:44,532 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:29:44,532 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:29:44,533 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 01:29:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:29:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:29:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:29:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:29:44,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 01:29:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:44,542 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:29:44,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:29:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:29:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:29:44,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:44,543 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] [2019-10-15 01:29:44,544 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:44,544 INFO L82 PathProgramCache]: Analyzing trace with hash -824983385, now seen corresponding path program 1 times [2019-10-15 01:29:44,545 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:44,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314783180] [2019-10-15 01:29:44,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:29:44,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314783180] [2019-10-15 01:29:44,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127320239] [2019-10-15 01:29:44,704 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 [2019-10-15 01:29:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:29:44,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:29:44,829 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:29:44,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091652212] [2019-10-15 01:29:44,897 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:29:44,897 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:29:44,906 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:29:44,920 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:29:44,921 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:29:45,136 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs