/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/max-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:20:53,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:20:53,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:20:53,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:20:53,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:20:53,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:20:53,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:20:53,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:20:53,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:20:53,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:20:53,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:20:53,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:20:53,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:20:53,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:20:53,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:20:53,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:20:53,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:20:53,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:20:53,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:20:53,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:20:53,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:20:53,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:20:53,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:20:53,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:20:53,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:20:53,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:20:53,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:20:53,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:20:53,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 23:20:53,972 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:20:53,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:20:53,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:20:53,973 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:20:53,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:20:53,974 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:20:53,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:20:53,978 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:20:53,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:20:53,978 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:20:53,979 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:20:53,979 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:20:53,979 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:20:53,979 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:20:53,980 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:20:53,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:20:53,982 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:20:53,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:20:53,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:20:53,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:20:53,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:20:53,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:20:53,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:20:53,984 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:20:53,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:20:53,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:20:53,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:20:53,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:20:53,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:20:53,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:20:53,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:20:53,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:20:53,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:20:53,990 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:20:53,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:20:53,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:20:53,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:20:53,990 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:20:54,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:20:54,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:20:54,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:20:54,289 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:20:54,289 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:20:54,290 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-11-23 23:20:54,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9af22bd/fc13e780f48c4993b02fa0605377ce64/FLAG4310c1f82 [2019-11-23 23:20:54,797 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:20:54,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-11-23 23:20:54,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9af22bd/fc13e780f48c4993b02fa0605377ce64/FLAG4310c1f82 [2019-11-23 23:20:55,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9af22bd/fc13e780f48c4993b02fa0605377ce64 [2019-11-23 23:20:55,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:20:55,170 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:20:55,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:55,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:20:55,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:20:55,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf97b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55, skipping insertion in model container [2019-11-23 23:20:55,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:20:55,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:20:55,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:55,397 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:20:55,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:55,437 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:20:55,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55 WrapperNode [2019-11-23 23:20:55,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:55,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:55,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:20:55,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:20:55,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:55,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:20:55,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:20:55,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:20:55,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (1/1) ... [2019-11-23 23:20:55,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:20:55,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:20:55,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:20:55,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:20:55,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 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 [2019-11-23 23:20:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:20:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:20:55,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:20:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:20:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:20:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:20:56,090 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:20:56,090 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 23:20:56,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:56 BoogieIcfgContainer [2019-11-23 23:20:56,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:20:56,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:20:56,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:20:56,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:20:56,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:20:55" (1/3) ... [2019-11-23 23:20:56,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b855d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:56, skipping insertion in model container [2019-11-23 23:20:56,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:55" (2/3) ... [2019-11-23 23:20:56,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b855d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:56, skipping insertion in model container [2019-11-23 23:20:56,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:56" (3/3) ... [2019-11-23 23:20:56,101 INFO L109 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2019-11-23 23:20:56,111 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:20:56,119 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:20:56,130 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:20:56,153 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:20:56,153 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:20:56,153 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:20:56,154 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:20:56,154 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:20:56,154 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:20:56,154 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:20:56,154 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:20:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 23:20:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:20:56,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:56,174 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:56,174 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:56,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1292296042, now seen corresponding path program 1 times [2019-11-23 23:20:56,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:56,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670544195] [2019-11-23 23:20:56,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:56,247 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:56,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750660226] [2019-11-23 23:20:56,248 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 [2019-11-23 23:20:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:56,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:56,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:56,359 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:56,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670544195] [2019-11-23 23:20:56,374 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:56,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750660226] [2019-11-23 23:20:56,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:56,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-23 23:20:56,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382591818] [2019-11-23 23:20:56,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:20:56,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:56,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:20:56,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:20:56,403 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2019-11-23 23:20:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:56,482 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2019-11-23 23:20:56,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:20:56,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:20:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:56,495 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:20:56,496 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 23:20:56,499 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:20:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 23:20:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 23:20:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 23:20:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2019-11-23 23:20:56,537 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 7 [2019-11-23 23:20:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:56,538 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-23 23:20:56,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:20:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2019-11-23 23:20:56,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:20:56,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:56,539 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:56,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:56,750 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:56,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1840922152, now seen corresponding path program 1 times [2019-11-23 23:20:56,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:56,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606259671] [2019-11-23 23:20:56,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:56,756 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:56,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253989263] [2019-11-23 23:20:56,757 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 [2019-11-23 23:20:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:56,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:56,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:20:56,822 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:20:56,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606259671] [2019-11-23 23:20:56,835 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:56,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253989263] [2019-11-23 23:20:56,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:56,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-23 23:20:56,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121763194] [2019-11-23 23:20:56,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:20:56,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:20:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:20:56,840 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. Second operand 6 states. [2019-11-23 23:20:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:56,981 INFO L93 Difference]: Finished difference Result 39 states and 59 transitions. [2019-11-23 23:20:56,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:20:56,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 23:20:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:56,983 INFO L225 Difference]: With dead ends: 39 [2019-11-23 23:20:56,984 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 23:20:56,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 23:20:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 23:20:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-11-23 23:20:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 23:20:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-23 23:20:57,003 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-11-23 23:20:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:57,003 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-23 23:20:57,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:20:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-23 23:20:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 23:20:57,007 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:57,007 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:57,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:57,212 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash 824965224, now seen corresponding path program 1 times [2019-11-23 23:20:57,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:57,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492457189] [2019-11-23 23:20:57,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:57,219 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:57,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32317066] [2019-11-23 23:20:57,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 23:20:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:57,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 23:20:57,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 23:20:57,324 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 23:20:57,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492457189] [2019-11-23 23:20:57,360 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:57,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32317066] [2019-11-23 23:20:57,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [298793014] [2019-11-23 23:20:57,384 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:20:57,384 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:20:57,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:20:57,397 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:20:57,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:21:26,270 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 254 [2019-11-23 23:21:33,318 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2019-11-23 23:21:33,473 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 268 [2019-11-23 23:21:37,072 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 279 [2019-11-23 23:21:39,374 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2019-11-23 23:21:39,557 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 282 [2019-11-23 23:21:48,414 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 299 [2019-11-23 23:21:57,129 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 314 [2019-11-23 23:21:59,443 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 318 [2019-11-23 23:22:01,768 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 323 [2019-11-23 23:22:01,898 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 320 [2019-11-23 23:22:02,134 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 320 [2019-11-23 23:22:02,353 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 322 [2019-11-23 23:22:04,829 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-23 23:22:04,964 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 326 [2019-11-23 23:22:07,374 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 331 [2019-11-23 23:22:07,498 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 330 [2019-11-23 23:22:10,372 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-23 23:22:10,604 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 332 [2019-11-23 23:22:10,832 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2019-11-23 23:22:13,583 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-23 23:22:13,699 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 339 [2019-11-23 23:22:16,514 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 23:22:16,642 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 342 [2019-11-23 23:22:19,349 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2019-11-23 23:22:19,469 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 345 [2019-11-23 23:22:21,990 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 352 [2019-11-23 23:22:22,133 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 347 [2019-11-23 23:22:22,261 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:22:22,383 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 349 [2019-11-23 23:22:25,141 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 358 [2019-11-23 23:22:25,266 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 354 [2019-11-23 23:22:28,035 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-23 23:22:28,175 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 358