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/sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:20:53,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:20:53,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:20:53,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:20:53,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:20:53,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:20:53,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:20:53,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:20:53,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:20:53,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:20:53,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:20:53,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:20:53,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:20:53,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:20:53,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:20:53,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:20:53,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:20:53,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:20:53,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:20:53,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:20:53,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:20:53,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:20:53,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:20:53,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:20:53,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:20:53,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:20:53,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:20:53,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:20:53,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:20:53,912 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:20:53,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:20:53,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:20:53,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:20:53,916 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:20:53,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:20:53,916 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:20:53,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:20:53,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:20:53,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:20:53,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:20:53,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:20:53,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:20:53,920 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:20:53,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:20:53,921 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:20:53,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:20:53,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:20:53,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:20:53,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:20:53,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:20:53,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:20:53,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:20:53,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:20:53,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:20:53,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:20:53,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:20:53,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:20:53,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:20:54,198 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:20:54,217 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:20:54,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:20:54,224 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:20:54,224 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:20:54,224 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum.i [2019-10-13 23:20:54,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5584caed/610305f820fd406893a731eda1027fe1/FLAGf497cac40 [2019-10-13 23:20:54,770 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:20:54,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum.i [2019-10-13 23:20:54,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5584caed/610305f820fd406893a731eda1027fe1/FLAGf497cac40 [2019-10-13 23:20:55,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5584caed/610305f820fd406893a731eda1027fe1 [2019-10-13 23:20:55,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:20:55,128 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:20:55,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:20:55,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:20:55,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:20:55,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:20:55" (1/1) ... [2019-10-13 23:20:55,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3306400a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55, skipping insertion in model container [2019-10-13 23:20:55,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:20:55" (1/1) ... [2019-10-13 23:20:55,144 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:20:55,163 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:20:55,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:20:55,356 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:20:55,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:20:55,397 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:20:55,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55 WrapperNode [2019-10-13 23:20:55,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:20:55,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:20:55,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:20:55,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:20:55,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55" (1/1) ... [2019-10-13 23:20:55,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55" (1/1) ... [2019-10-13 23:20:55,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55" (1/1) ... [2019-10-13 23:20:55,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55" (1/1) ... [2019-10-13 23:20:55,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55" (1/1) ... [2019-10-13 23:20:55,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55" (1/1) ... [2019-10-13 23:20:55,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55" (1/1) ... [2019-10-13 23:20:55,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:20:55,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:20:55,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:20:55,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:20:55,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:20:55,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:20:55,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:20:55,576 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-10-13 23:20:55,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:20:55,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:20:55,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:20:55,577 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-10-13 23:20:55,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:20:55,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:20:55,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:20:55,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:20:55,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:20:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:20:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:20:55,946 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:20:55,946 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 23:20:55,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:20:55 BoogieIcfgContainer [2019-10-13 23:20:55,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:20:55,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:20:55,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:20:55,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:20:55,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:20:55" (1/3) ... [2019-10-13 23:20:55,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d939f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:20:55, skipping insertion in model container [2019-10-13 23:20:55,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:55" (2/3) ... [2019-10-13 23:20:55,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d939f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:20:55, skipping insertion in model container [2019-10-13 23:20:55,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:20:55" (3/3) ... [2019-10-13 23:20:55,956 INFO L109 eAbstractionObserver]: Analyzing ICFG sum.i [2019-10-13 23:20:55,963 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:20:55,970 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:20:55,980 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:20:56,005 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:20:56,005 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:20:56,005 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:20:56,005 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:20:56,006 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:20:56,006 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:20:56,006 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:20:56,006 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:20:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-13 23:20:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 23:20:56,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:56,032 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:20:56,034 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1602370502, now seen corresponding path program 1 times [2019-10-13 23:20:56,047 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:56,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138593852] [2019-10-13 23:20:56,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:56,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:56,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:20:56,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138593852] [2019-10-13 23:20:56,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850959129] [2019-10-13 23:20:56,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:20:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:56,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:20:56,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:20:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:20:56,445 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:20:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:20:56,532 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:20:56,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2019-10-13 23:20:56,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191262550] [2019-10-13 23:20:56,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:20:56,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:56,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:20:56,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:20:56,558 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-10-13 23:20:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:56,649 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-10-13 23:20:56,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:20:56,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-13 23:20:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:56,661 INFO L225 Difference]: With dead ends: 46 [2019-10-13 23:20:56,661 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 23:20:56,665 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:20:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 23:20:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 23:20:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 23:20:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-13 23:20:56,712 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 24 [2019-10-13 23:20:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:56,713 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-13 23:20:56,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:20:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-13 23:20:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 23:20:56,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:56,716 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] [2019-10-13 23:20:56,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:20:56,920 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:56,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1904412546, now seen corresponding path program 1 times [2019-10-13 23:20:56,922 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:56,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733121838] [2019-10-13 23:20:56,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:56,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:56,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:20:57,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733121838] [2019-10-13 23:20:57,062 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:20:57,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:20:57,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580284775] [2019-10-13 23:20:57,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:20:57,064 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:57,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:20:57,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:20:57,067 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2019-10-13 23:20:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:57,112 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-13 23:20:57,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:20:57,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-13 23:20:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:57,114 INFO L225 Difference]: With dead ends: 30 [2019-10-13 23:20:57,114 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 23:20:57,116 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:20:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 23:20:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 23:20:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 23:20:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-10-13 23:20:57,123 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 27 [2019-10-13 23:20:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:57,125 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-10-13 23:20:57,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:20:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-10-13 23:20:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 23:20:57,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:57,127 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:20:57,128 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash 852534480, now seen corresponding path program 1 times [2019-10-13 23:20:57,129 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:57,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365993310] [2019-10-13 23:20:57,129 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:57,129 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:57,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:20:57,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365993310] [2019-10-13 23:20:57,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647468790] [2019-10-13 23:20:57,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:20:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:57,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:20:57,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:20:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:20:57,367 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:20:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:20:57,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [597978749] [2019-10-13 23:20:57,491 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 23:20:57,491 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:20:57,499 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:20:57,507 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:20:57,508 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:20:57,683 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-13 23:20:59,553 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-13 23:20:59,606 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-13 23:20:59,614 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:20:59,614 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:20:59,615 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 618#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= ~N~0 |old(~N~0)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 23:20:59,615 INFO L193 IcfgInterpreter]: Reachable states at location L36-1 satisfy 449#true [2019-10-13 23:20:59,616 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 204#(or (and (not (= main_~ret~1 main_~ret5~0)) (exists ((v_prenex_29 Int) (v_sum_~ret~0_BEFORE_RETURN_5 Int) (v_sum_~ret~0_BEFORE_RETURN_6 Int) (v_prenex_30 Int)) (or (and (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_sum_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (= (mod v_sum_~ret~0_BEFORE_RETURN_5 4294967296) main_~ret5~0) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (not (<= (mod v_prenex_29 4294967296) 2147483647)) (= main_~ret5~0 (+ (mod v_prenex_29 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (= main_~ret5~0 (mod v_prenex_30 4294967296)) (<= (mod v_prenex_30 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (not (<= (mod v_sum_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (= main_~ret5~0 (+ (mod v_sum_~ret~0_BEFORE_RETURN_6 4294967296) (- 4294967296))) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0)))))) (and (not (= main_~ret~1 main_~ret2~0)) (exists ((v_prenex_29 Int) (v_sum_~ret~0_BEFORE_RETURN_5 Int) (v_sum_~ret~0_BEFORE_RETURN_6 Int) (v_prenex_30 Int)) (or (and (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_sum_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (= (mod v_sum_~ret~0_BEFORE_RETURN_5 4294967296) main_~ret5~0) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (not (<= (mod v_prenex_29 4294967296) 2147483647)) (= main_~ret5~0 (+ (mod v_prenex_29 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (= main_~ret5~0 (mod v_prenex_30 4294967296)) (<= (mod v_prenex_30 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (not (<= (mod v_sum_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (= main_~ret5~0 (+ (mod v_sum_~ret~0_BEFORE_RETURN_6 4294967296) (- 4294967296))) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))))))) [2019-10-13 23:20:59,616 INFO L193 IcfgInterpreter]: Reachable states at location L11-3 satisfy 609#(<= 0 sum_~i~0) [2019-10-13 23:20:59,616 INFO L193 IcfgInterpreter]: Reachable states at location L36 satisfy 492#(and (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) [2019-10-13 23:20:59,617 INFO L193 IcfgInterpreter]: Reachable states at location L27-1 satisfy 90#(or (exists ((v_prenex_2 Int) (v_sum_~ret~0_BEFORE_RETURN_2 Int)) (or (and (not (<= (mod v_prenex_2 4294967296) 2147483647)) (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (= (+ (mod v_prenex_2 4294967296) (- 4294967296)) |main_#t~ret3|)) (and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (= (mod v_sum_~ret~0_BEFORE_RETURN_2 4294967296) |main_#t~ret3|) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (<= (mod v_sum_~ret~0_BEFORE_RETURN_2 4294967296) 2147483647)))) (exists ((v_prenex_1 Int) (v_sum_~ret~0_BEFORE_RETURN_1 Int)) (or (and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (mod v_prenex_1 4294967296) |main_#t~ret3|) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (<= (mod v_prenex_1 4294967296) 2147483647)) (and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (not (<= (mod v_sum_~ret~0_BEFORE_RETURN_1 4294967296) 2147483647)) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (= |main_#t~ret3| (+ (mod v_sum_~ret~0_BEFORE_RETURN_1 4294967296) (- 4294967296))) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0))))) [2019-10-13 23:20:59,617 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 ~N~0) (= 0 |#NULL.base|) (<= 0 ~N~0) (<= |#NULL.base| 0) (<= ~N~0 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:20:59,617 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= ~N~0 0) (<= 0 |#NULL.base|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (<= 0 ~N~0) (= |#valid| |old(#valid)|) (= ~N~0 |old(~N~0)|) (= |#memory_int| |old(#memory_int)|) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|)) [2019-10-13 23:20:59,617 INFO L193 IcfgInterpreter]: Reachable states at location L27 satisfy 43#(and (<= ~N~0 2147483647) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |main_~#x~0.offset|) (<= |main_~#x~0.offset| 0) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (<= 1 ~N~0) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) [2019-10-13 23:20:59,618 INFO L193 IcfgInterpreter]: Reachable states at location sumENTRY satisfy 571#true [2019-10-13 23:20:59,619 INFO L193 IcfgInterpreter]: Reachable states at location L38 satisfy 350#true [2019-10-13 23:20:59,619 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 623#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 ~N~0) (= 0 |#NULL.base|) (<= 0 ~N~0) (<= |#NULL.base| 0) (<= ~N~0 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:20:59,619 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:20:59,619 INFO L193 IcfgInterpreter]: Reachable states at location L39 satisfy 283#true [2019-10-13 23:20:59,619 INFO L193 IcfgInterpreter]: Reachable states at location L30-1 satisfy 557#true [2019-10-13 23:20:59,620 INFO L193 IcfgInterpreter]: Reachable states at location L32-3 satisfy 530#true [2019-10-13 23:20:59,620 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 562#(exists ((v_prenex_2 Int) (v_prenex_1 Int) (v_sum_~ret~0_BEFORE_RETURN_1 Int) (v_sum_~ret~0_BEFORE_RETURN_2 Int)) (or (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= main_~ret~1 (mod v_prenex_1 4294967296)) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (<= (mod v_prenex_1 4294967296) 2147483647)) (and (= 0 |#NULL.base|) (= (mod v_sum_~ret~0_BEFORE_RETURN_2 4294967296) main_~ret~1) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (<= (mod v_sum_~ret~0_BEFORE_RETURN_2 4294967296) 2147483647)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (not (<= (mod v_prenex_2 4294967296) 2147483647)) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= (+ (mod v_prenex_2 4294967296) (- 4294967296)) main_~ret~1) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= main_~ret~1 (+ (mod v_sum_~ret~0_BEFORE_RETURN_1 4294967296) (- 4294967296))) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (not (<= (mod v_sum_~ret~0_BEFORE_RETURN_1 4294967296) 2147483647)) (<= 0 |#NULL.offset|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)))) [2019-10-13 23:20:59,620 INFO L193 IcfgInterpreter]: Reachable states at location L20 satisfy 38#(and (<= ~N~0 2147483647) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (<= 0 (+ ~N~0 2147483648)) (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|)) [2019-10-13 23:20:59,621 INFO L193 IcfgInterpreter]: Reachable states at location sumEXIT satisfy 614#(and (<= 0 sum_~i~0) (= |sum_#res| (ite (<= (mod sum_~ret~0 4294967296) 2147483647) (mod sum_~ret~0 4294967296) (+ (mod sum_~ret~0 4294967296) (- 4294967296)))) (not (< sum_~i~0 ~N~0))) [2019-10-13 23:21:00,297 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:21:00,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 12] total 21 [2019-10-13 23:21:00,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364908328] [2019-10-13 23:21:00,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 23:21:00,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:21:00,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 23:21:00,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2019-10-13 23:21:00,305 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 22 states. [2019-10-13 23:21:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:21:00,936 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2019-10-13 23:21:00,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 23:21:00,936 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-10-13 23:21:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:21:00,938 INFO L225 Difference]: With dead ends: 36 [2019-10-13 23:21:00,938 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 23:21:00,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2019-10-13 23:21:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 23:21:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 23:21:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 23:21:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-13 23:21:00,945 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 28 [2019-10-13 23:21:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:21:00,946 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-13 23:21:00,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 23:21:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-13 23:21:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 23:21:00,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:21:00,947 INFO L380 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:21:01,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:01,160 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:21:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:21:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash -808289344, now seen corresponding path program 2 times [2019-10-13 23:21:01,161 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:21:01,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178531855] [2019-10-13 23:21:01,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:01,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:01,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:21:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:21:06,387 WARN L191 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2019-10-13 23:21:06,616 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2019-10-13 23:21:07,073 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2019-10-13 23:21:09,420 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 73 DAG size of output: 30 [2019-10-13 23:21:09,601 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 29 [2019-10-13 23:21:10,146 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2019-10-13 23:21:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:21:10,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178531855] [2019-10-13 23:21:10,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183622453] [2019-10-13 23:21:10,271 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 [2019-10-13 23:21:10,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-13 23:21:10,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 23:21:10,400 WARN L254 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 92 conjunts are in the unsatisfiable core [2019-10-13 23:21:10,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:21:12,241 WARN L191 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2019-10-13 23:21:12,900 WARN L191 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 129 [2019-10-13 23:21:14,552 WARN L191 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 175 DAG size of output: 171 [2019-10-13 23:21:15,863 WARN L191 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 165 DAG size of output: 161 [2019-10-13 23:21:16,369 WARN L191 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2019-10-13 23:21:17,238 WARN L191 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 140 [2019-10-13 23:21:17,989 WARN L191 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 132 [2019-10-13 23:21:18,348 WARN L191 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2019-10-13 23:21:18,685 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2019-10-13 23:21:19,536 WARN L191 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 131 [2019-10-13 23:21:19,902 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2019-10-13 23:21:22,485 WARN L191 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 136 DAG size of output: 58 [2019-10-13 23:21:22,919 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2019-10-13 23:21:23,404 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-10-13 23:21:23,782 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-10-13 23:21:35,168 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-10-13 23:21:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 23:21:35,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:21:39,219 WARN L191 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2019-10-13 23:21:39,245 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9