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/max.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:24:54,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:24:54,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:24:54,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:24:54,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:24:54,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:24:54,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:24:54,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:24:54,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:24:54,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:24:54,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:24:54,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:24:54,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:24:54,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:24:54,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:24:54,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:24:54,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:24:54,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:24:54,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:24:54,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:24:54,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:24:54,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:24:54,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:24:54,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:24:54,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:24:54,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:24:54,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:24:54,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:24:54,978 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 03:24:54,992 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:24:54,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:24:54,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:24:54,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:24:54,994 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:24:54,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:24:54,994 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:24:54,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:24:54,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:24:54,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:24:54,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:24:54,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:24:54,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:24:54,996 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:24:54,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:24:54,996 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:24:54,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:24:54,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:24:54,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:24:54,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:24:54,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:24:54,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:24:54,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:24:54,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:24:54,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:24:54,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:24:54,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:24:54,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:24:54,999 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 03:24:55,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:24:55,292 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:24:55,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:24:55,298 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:24:55,298 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:24:55,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max.i [2019-10-15 03:24:55,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ccc44810/1249abad3411480386e09244ef8627d9/FLAG6afa02a60 [2019-10-15 03:24:55,800 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:24:55,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max.i [2019-10-15 03:24:55,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ccc44810/1249abad3411480386e09244ef8627d9/FLAG6afa02a60 [2019-10-15 03:24:56,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ccc44810/1249abad3411480386e09244ef8627d9 [2019-10-15 03:24:56,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:24:56,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:24:56,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:56,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:24:56,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:24:56,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:56" (1/1) ... [2019-10-15 03:24:56,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a1e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56, skipping insertion in model container [2019-10-15 03:24:56,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:56" (1/1) ... [2019-10-15 03:24:56,256 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:24:56,274 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:24:56,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:56,478 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:24:56,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:56,518 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:24:56,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56 WrapperNode [2019-10-15 03:24:56,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:56,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:24:56,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:24:56,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:24:56,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56" (1/1) ... [2019-10-15 03:24:56,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56" (1/1) ... [2019-10-15 03:24:56,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56" (1/1) ... [2019-10-15 03:24:56,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56" (1/1) ... [2019-10-15 03:24:56,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56" (1/1) ... [2019-10-15 03:24:56,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56" (1/1) ... [2019-10-15 03:24:56,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56" (1/1) ... [2019-10-15 03:24:56,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:24:56,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:24:56,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:24:56,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:24:56,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56" (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 03:24:56,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:24:56,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:24:56,699 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-10-15 03:24:56,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:24:56,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:24:56,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:24:56,700 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-10-15 03:24:56,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:24:56,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:24:56,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:24:56,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:24:56,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:24:56,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:24:56,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:24:57,090 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:24:57,091 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 03:24:57,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:57 BoogieIcfgContainer [2019-10-15 03:24:57,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:24:57,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:24:57,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:24:57,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:24:57,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:24:56" (1/3) ... [2019-10-15 03:24:57,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16245fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:57, skipping insertion in model container [2019-10-15 03:24:57,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:56" (2/3) ... [2019-10-15 03:24:57,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16245fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:57, skipping insertion in model container [2019-10-15 03:24:57,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:57" (3/3) ... [2019-10-15 03:24:57,100 INFO L109 eAbstractionObserver]: Analyzing ICFG max.i [2019-10-15 03:24:57,110 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:24:57,117 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:24:57,126 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:24:57,148 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:24:57,149 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:24:57,149 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:24:57,149 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:24:57,149 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:24:57,149 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:24:57,149 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:24:57,149 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:24:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 03:24:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:24:57,173 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:57,174 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 03:24:57,176 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1922277371, now seen corresponding path program 1 times [2019-10-15 03:24:57,188 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:57,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082677385] [2019-10-15 03:24:57,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:57,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:57,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 03:24:57,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082677385] [2019-10-15 03:24:57,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649735859] [2019-10-15 03:24:57,443 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 03:24:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:57,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:24:57,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 03:24:57,599 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 03:24:57,690 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:24:57,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2019-10-15 03:24:57,691 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731159161] [2019-10-15 03:24:57,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:24:57,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:24:57,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:24:57,719 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-10-15 03:24:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:57,818 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-10-15 03:24:57,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:24:57,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-15 03:24:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:57,831 INFO L225 Difference]: With dead ends: 46 [2019-10-15 03:24:57,831 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:24:57,835 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 [2019-10-15 03:24:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:24:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:24:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:24:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 03:24:57,886 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 24 [2019-10-15 03:24:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:57,887 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 03:24:57,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:24:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 03:24:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 03:24:57,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:57,890 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] [2019-10-15 03:24:58,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:24:58,095 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:58,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1360249756, now seen corresponding path program 1 times [2019-10-15 03:24:58,096 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:58,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683019977] [2019-10-15 03:24:58,096 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:58,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:58,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:24:58,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683019977] [2019-10-15 03:24:58,269 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:58,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:24:58,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424386657] [2019-10-15 03:24:58,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:24:58,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:58,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:24:58,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:24:58,273 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2019-10-15 03:24:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:58,316 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 03:24:58,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:24:58,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-15 03:24:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:58,318 INFO L225 Difference]: With dead ends: 30 [2019-10-15 03:24:58,319 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:24:58,320 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 [2019-10-15 03:24:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:24:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:24:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:24:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-10-15 03:24:58,327 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 27 [2019-10-15 03:24:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:58,329 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-10-15 03:24:58,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:24:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-10-15 03:24:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:24:58,330 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:58,331 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 03:24:58,331 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:58,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1127678421, now seen corresponding path program 1 times [2019-10-15 03:24:58,332 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:58,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075424803] [2019-10-15 03:24:58,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:58,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:58,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:24:58,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075424803] [2019-10-15 03:24:58,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91114325] [2019-10-15 03:24:58,435 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 03:24:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:58,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:24:58,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:24:58,537 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:24:58,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084249946] [2019-10-15 03:24:58,661 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:24:58,661 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:24:58,667 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:24:58,675 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:24:58,676 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:24:58,901 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 03:25:00,784 INFO L199 IcfgInterpreter]: Interpreting procedure max with input of size 1 for LOIs [2019-10-15 03:25:00,847 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 03:25:00,853 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:01,604 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:01,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 12] total 21 [2019-10-15 03:25:01,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385857010] [2019-10-15 03:25:01,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:25:01,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:25:01,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:25:01,608 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 22 states. [2019-10-15 03:25:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:02,205 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2019-10-15 03:25:02,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 03:25:02,206 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-10-15 03:25:02,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:02,207 INFO L225 Difference]: With dead ends: 36 [2019-10-15 03:25:02,207 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:25:02,208 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:25:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:25:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:25:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-15 03:25:02,217 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 28 [2019-10-15 03:25:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:02,217 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-15 03:25:02,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:25:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-15 03:25:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 03:25:02,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:02,220 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] [2019-10-15 03:25:02,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:02,425 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:02,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:02,426 INFO L82 PathProgramCache]: Analyzing trace with hash 257299344, now seen corresponding path program 2 times [2019-10-15 03:25:02,426 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:02,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32806139] [2019-10-15 03:25:02,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:02,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:02,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat