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/reducercommutativity/sum10-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:25:38,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:25:38,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:25:38,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:25:38,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:25:38,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:25:38,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:25:38,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:25:38,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:25:38,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:25:38,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:25:38,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:25:38,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:25:38,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:25:38,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:25:38,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:25:38,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:25:38,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:25:38,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:25:38,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:25:38,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:25:38,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:25:38,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:25:38,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:25:38,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:25:38,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:25:38,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:25:38,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:25:38,784 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 03:25:38,798 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:25:38,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:25:38,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:25:38,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:25:38,800 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:25:38,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:25:38,800 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:25:38,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:25:38,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:25:38,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:25:38,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:25:38,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:25:38,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:25:38,801 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:25:38,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:25:38,802 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:25:38,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:25:38,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:25:38,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:25:38,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:25:38,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:25:38,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:25:38,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:25:38,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:25:38,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:25:38,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:25:38,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:25:38,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:25:38,804 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 03:25:39,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:25:39,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:25:39,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:25:39,090 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:25:39,090 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:25:39,091 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum10-1.i [2019-10-15 03:25:39,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3286a56/80e8373063c14857811d23259abf98e7/FLAG3396db750 [2019-10-15 03:25:39,621 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:25:39,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum10-1.i [2019-10-15 03:25:39,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3286a56/80e8373063c14857811d23259abf98e7/FLAG3396db750 [2019-10-15 03:25:40,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3286a56/80e8373063c14857811d23259abf98e7 [2019-10-15 03:25:40,051 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:25:40,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:25:40,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:40,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:25:40,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:25:40,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:40" (1/1) ... [2019-10-15 03:25:40,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b718235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40, skipping insertion in model container [2019-10-15 03:25:40,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:40" (1/1) ... [2019-10-15 03:25:40,070 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:25:40,092 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:25:40,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:40,322 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:25:40,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:40,355 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:25:40,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40 WrapperNode [2019-10-15 03:25:40,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:40,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:25:40,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:25:40,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:25:40,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40" (1/1) ... [2019-10-15 03:25:40,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40" (1/1) ... [2019-10-15 03:25:40,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40" (1/1) ... [2019-10-15 03:25:40,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40" (1/1) ... [2019-10-15 03:25:40,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40" (1/1) ... [2019-10-15 03:25:40,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40" (1/1) ... [2019-10-15 03:25:40,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40" (1/1) ... [2019-10-15 03:25:40,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:25:40,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:25:40,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:25:40,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:25:40,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40" (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 03:25:40,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:25:40,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:25:40,542 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-10-15 03:25:40,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:25:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:25:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:25:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-10-15 03:25:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:25:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:25:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:25:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:25:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:25:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:25:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:25:40,923 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:25:40,924 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:25:40,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:40 BoogieIcfgContainer [2019-10-15 03:25:40,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:25:40,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:25:40,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:25:40,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:25:40,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:25:40" (1/3) ... [2019-10-15 03:25:40,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77368bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:40, skipping insertion in model container [2019-10-15 03:25:40,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:40" (2/3) ... [2019-10-15 03:25:40,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77368bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:40, skipping insertion in model container [2019-10-15 03:25:40,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:40" (3/3) ... [2019-10-15 03:25:40,935 INFO L109 eAbstractionObserver]: Analyzing ICFG sum10-1.i [2019-10-15 03:25:40,944 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:25:40,950 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:25:40,961 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:25:40,982 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:25:40,983 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:25:40,983 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:25:40,983 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:25:40,983 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:25:40,983 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:25:40,983 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:25:40,983 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:25:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:25:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:25:41,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:41,005 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 03:25:41,007 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1818423299, now seen corresponding path program 1 times [2019-10-15 03:25:41,017 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:41,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371397456] [2019-10-15 03:25:41,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:41,179 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 03:25:41,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371397456] [2019-10-15 03:25:41,181 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:41,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:41,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639402843] [2019-10-15 03:25:41,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:41,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:41,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:41,199 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:25:41,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:41,235 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:25:41,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:41,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:25:41,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:41,246 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:25:41,247 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:25:41,250 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 03:25:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:25:41,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:25:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:25:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:25:41,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:25:41,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:41,291 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:25:41,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:25:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:25:41,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:41,294 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 03:25:41,295 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:41,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2093950433, now seen corresponding path program 1 times [2019-10-15 03:25:41,296 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:41,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833717248] [2019-10-15 03:25:41,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:41,373 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 03:25:41,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833717248] [2019-10-15 03:25:41,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914524152] [2019-10-15 03:25:41,375 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 03:25:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:41,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:25:41,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:41,493 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 03:25:41,494 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:41,537 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 03:25:41,537 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:25:41,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:25:41,538 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032414161] [2019-10-15 03:25:41,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:41,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:41,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:25:41,540 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:25:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:41,551 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:25:41,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:41,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:25:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:41,553 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:25:41,553 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:25:41,554 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 03:25:41,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:25:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:25:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:25:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:25:41,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:25:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:41,561 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:25:41,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:25:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:25:41,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:41,562 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 03:25:41,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:41,775 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:41,776 INFO L82 PathProgramCache]: Analyzing trace with hash 903502258, now seen corresponding path program 1 times [2019-10-15 03:25:41,776 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:41,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314623132] [2019-10-15 03:25:41,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:41,877 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 03:25:41,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314623132] [2019-10-15 03:25:41,878 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:41,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:41,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269023050] [2019-10-15 03:25:41,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:41,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:41,880 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:25:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:41,896 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:25:41,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:41,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:25:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:41,900 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:25:41,900 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:25:41,901 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 03:25:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:25:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:25:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:25:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:25:41,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:25:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:41,908 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:25:41,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:25:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:25:41,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:41,910 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 03:25:41,911 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:41,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2130547361, now seen corresponding path program 1 times [2019-10-15 03:25:41,911 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:41,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775962202] [2019-10-15 03:25:41,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:42,008 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 03:25:42,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775962202] [2019-10-15 03:25:42,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269802259] [2019-10-15 03:25:42,009 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 03:25:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:42,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:42,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:42,119 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 03:25:42,119 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:42,159 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 03:25:42,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279460173] [2019-10-15 03:25:42,195 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:42,196 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:42,202 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:42,209 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:42,209 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:42,360 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:44,327 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:44,382 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:44,386 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:44,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:44,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:44,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690087833] [2019-10-15 03:25:44,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:44,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:44,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:44,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:44,733 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 03:25:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:45,316 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:25:45,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:45,317 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 03:25:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:45,318 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:25:45,318 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:25:45,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:25:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:25:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:25:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:25:45,325 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 03:25:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:45,326 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:25:45,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:25:45,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:25:45,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:45,327 INFO L380 BasicCegarLoop]: trace histogram [4, 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 03:25:45,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:45,531 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:45,531 INFO L82 PathProgramCache]: Analyzing trace with hash 356639231, now seen corresponding path program 2 times [2019-10-15 03:25:45,532 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:45,532 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294170632] [2019-10-15 03:25:45,532 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:45,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:45,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:45,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294170632] [2019-10-15 03:25:45,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319134877] [2019-10-15 03:25:45,651 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 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 03:25:45,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:25:45,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:45,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:45,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:45,772 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:45,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688926988] [2019-10-15 03:25:45,803 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:45,803 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:45,803 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:45,804 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:45,804 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:45,837 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:47,411 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:47,459 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:47,464 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:47,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:47,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 03:25:47,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830220708] [2019-10-15 03:25:47,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:25:47,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:47,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:25:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:25:47,839 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 03:25:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:48,692 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 03:25:48,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:25:48,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 03:25:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:48,694 INFO L225 Difference]: With dead ends: 44 [2019-10-15 03:25:48,694 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 03:25:48,696 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 03:25:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 03:25:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 03:25:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:25:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 03:25:48,702 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 03:25:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:48,703 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 03:25:48,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:25:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 03:25:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:25:48,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:48,704 INFO L380 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:48,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:48,909 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:48,910 INFO L82 PathProgramCache]: Analyzing trace with hash 906031436, now seen corresponding path program 3 times [2019-10-15 03:25:48,910 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:48,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248082378] [2019-10-15 03:25:48,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:48,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:48,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:49,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248082378] [2019-10-15 03:25:49,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963190927] [2019-10-15 03:25:49,046 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 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 03:25:49,163 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:49,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:49,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:25:49,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:25:49,212 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:25:49,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575739504] [2019-10-15 03:25:49,297 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:49,297 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:49,298 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:49,298 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:49,299 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:49,322 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:50,795 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:50,828 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:50,832 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:51,432 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:51,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7, 11] total 28 [2019-10-15 03:25:51,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889672485] [2019-10-15 03:25:51,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 03:25:51,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 03:25:51,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2019-10-15 03:25:51,440 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2019-10-15 03:25:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:54,738 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-15 03:25:54,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 03:25:54,738 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2019-10-15 03:25:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:54,740 INFO L225 Difference]: With dead ends: 54 [2019-10-15 03:25:54,740 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:25:54,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=420, Invalid=2336, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 03:25:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:25:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 03:25:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 03:25:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 03:25:54,750 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 03:25:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:54,750 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 03:25:54,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 03:25:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 03:25:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-15 03:25:54,752 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:54,753 INFO L380 BasicCegarLoop]: trace histogram [30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:54,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:54,957 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1834628722, now seen corresponding path program 4 times [2019-10-15 03:25:54,958 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:54,959 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870762716] [2019-10-15 03:25:54,959 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:54,959 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:54,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-10-15 03:25:55,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870762716] [2019-10-15 03:25:55,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288635786] [2019-10-15 03:25:55,076 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:55,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 03:25:55,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-10-15 03:25:55,252 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-10-15 03:25:55,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878492726] [2019-10-15 03:25:55,315 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:55,315 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:55,316 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:55,316 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:55,316 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:55,332 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:56,557 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:56,579 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:56,582 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:56,894 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:56,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 23 [2019-10-15 03:25:56,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253026071] [2019-10-15 03:25:56,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 03:25:56,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:56,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 03:25:56,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:25:56,898 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 24 states. [2019-10-15 03:25:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:57,719 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2019-10-15 03:25:57,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 03:25:57,719 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 61 [2019-10-15 03:25:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:57,720 INFO L225 Difference]: With dead ends: 64 [2019-10-15 03:25:57,721 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 03:25:57,724 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 168 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 03:25:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 03:25:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-15 03:25:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 03:25:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-10-15 03:25:57,738 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 61 [2019-10-15 03:25:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:57,738 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-10-15 03:25:57,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 03:25:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-10-15 03:25:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 03:25:57,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:57,741 INFO L380 BasicCegarLoop]: trace histogram [30, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:57,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:57,953 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1863540466, now seen corresponding path program 5 times [2019-10-15 03:25:57,953 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:57,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818570646] [2019-10-15 03:25:57,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:57,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:57,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-10-15 03:25:58,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818570646] [2019-10-15 03:25:58,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096001397] [2019-10-15 03:25:58,043 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:58,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:25:58,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:58,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:58,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 246 proven. 1 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-10-15 03:25:58,264 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-10-15 03:25:58,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [658633144] [2019-10-15 03:25:58,285 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:58,285 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:58,286 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:58,286 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:58,286 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:58,301 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:59,458 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:59,479 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:59,481 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:59,760 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:59,760 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:59,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19054295] [2019-10-15 03:25:59,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:59,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:59,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:59,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:59,763 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 18 states. [2019-10-15 03:26:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:00,378 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2019-10-15 03:26:00,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:26:00,379 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2019-10-15 03:26:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:00,380 INFO L225 Difference]: With dead ends: 61 [2019-10-15 03:26:00,381 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 03:26:00,382 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:26:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 03:26:00,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-15 03:26:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 03:26:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-10-15 03:26:00,391 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 65 [2019-10-15 03:26:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:00,392 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-10-15 03:26:00,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:26:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-10-15 03:26:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 03:26:00,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:00,393 INFO L380 BasicCegarLoop]: trace histogram [30, 10, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:26:00,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:00,598 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash -626033123, now seen corresponding path program 6 times [2019-10-15 03:26:00,599 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:00,599 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779594814] [2019-10-15 03:26:00,599 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:00,599 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:00,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-10-15 03:26:00,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779594814] [2019-10-15 03:26:00,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514657605] [2019-10-15 03:26:00,701 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:00,920 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:26:00,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:26:00,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:26:00,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 246 proven. 10 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-10-15 03:26:00,950 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-10-15 03:26:01,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740829655] [2019-10-15 03:26:01,037 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:01,038 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:01,038 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:01,038 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:01,039 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:01,052 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:02,193 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:02,217 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:02,220 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:02,540 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:02,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 22 [2019-10-15 03:26:02,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621122742] [2019-10-15 03:26:02,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 03:26:02,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 03:26:02,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2019-10-15 03:26:02,543 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 23 states. [2019-10-15 03:26:03,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:03,402 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2019-10-15 03:26:03,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:26:03,402 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 68 [2019-10-15 03:26:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:03,404 INFO L225 Difference]: With dead ends: 66 [2019-10-15 03:26:03,404 INFO L226 Difference]: Without dead ends: 48 [2019-10-15 03:26:03,405 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 03:26:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-15 03:26:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-15 03:26:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-15 03:26:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-10-15 03:26:03,413 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 68 [2019-10-15 03:26:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:03,413 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-10-15 03:26:03,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 03:26:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-10-15 03:26:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-15 03:26:03,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:03,415 INFO L380 BasicCegarLoop]: trace histogram [30, 10, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:26:03,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:03,629 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:03,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2107357042, now seen corresponding path program 7 times [2019-10-15 03:26:03,629 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:03,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098589275] [2019-10-15 03:26:03,629 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:03,629 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:03,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat