/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/min-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:22:09,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:22:09,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:22:10,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:22:10,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:22:10,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:22:10,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:22:10,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:22:10,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:22:10,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:22:10,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:22:10,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:22:10,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:22:10,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:22:10,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:22:10,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:22:10,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:22:10,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:22:10,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:22:10,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:22:10,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:22:10,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:22:10,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:22:10,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:22:10,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:22:10,055 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 23:22:10,085 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:22:10,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:22:10,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:22:10,087 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:22:10,087 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:22:10,087 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:22:10,087 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:22:10,087 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:22:10,088 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:22:10,088 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:22:10,089 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:22:10,090 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:22:10,090 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:22:10,090 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:22:10,091 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:22:10,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:22:10,092 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:22:10,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:22:10,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:22:10,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:22:10,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:22:10,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:22:10,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:22:10,094 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:22:10,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:22:10,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:22:10,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:22:10,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:22:10,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:22:10,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:22:10,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:22:10,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:22:10,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:22:10,098 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:22:10,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:22:10,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:22:10,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:22:10,099 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:22:10,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:22:10,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:22:10,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:22:10,426 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:22:10,427 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:22:10,428 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-11-23 23:22:10,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04e194c1/b3e6b7a1e43642779810deedfa0ab4cd/FLAG3aaa2b2dc [2019-11-23 23:22:11,003 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:22:11,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-11-23 23:22:11,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04e194c1/b3e6b7a1e43642779810deedfa0ab4cd/FLAG3aaa2b2dc [2019-11-23 23:22:11,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04e194c1/b3e6b7a1e43642779810deedfa0ab4cd [2019-11-23 23:22:11,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:22:11,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:22:11,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:22:11,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:22:11,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:22:11,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@713c8157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11, skipping insertion in model container [2019-11-23 23:22:11,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:22:11,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:22:11,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:22:11,552 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:22:11,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:22:11,593 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:22:11,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11 WrapperNode [2019-11-23 23:22:11,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:22:11,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:22:11,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:22:11,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:22:11,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:22:11,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:22:11,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:22:11,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:22:11,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (1/1) ... [2019-11-23 23:22:11,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:22:11,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:22:11,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:22:11,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:22:11,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (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 23:22:11,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:22:11,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:22:11,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:22:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:22:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:22:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:22:12,241 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:22:12,242 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 23:22:12,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:22:12 BoogieIcfgContainer [2019-11-23 23:22:12,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:22:12,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:22:12,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:22:12,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:22:12,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:22:11" (1/3) ... [2019-11-23 23:22:12,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e9a7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:22:12, skipping insertion in model container [2019-11-23 23:22:12,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:11" (2/3) ... [2019-11-23 23:22:12,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e9a7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:22:12, skipping insertion in model container [2019-11-23 23:22:12,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:22:12" (3/3) ... [2019-11-23 23:22:12,252 INFO L109 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2019-11-23 23:22:12,260 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:22:12,266 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:22:12,276 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:22:12,296 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:22:12,296 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:22:12,297 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:22:12,297 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:22:12,297 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:22:12,297 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:22:12,297 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:22:12,297 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:22:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 23:22:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:22:12,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:22:12,320 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:22:12,320 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:22:12,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:22:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash 921964121, now seen corresponding path program 1 times [2019-11-23 23:22:12,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:22:12,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692710665] [2019-11-23 23:22:12,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:22:12,397 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:22:12,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040301375] [2019-11-23 23:22:12,398 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 23:22:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:22:12,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:22:12,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:22:12,548 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 23:22:12,549 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:22:12,561 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 23:22:12,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692710665] [2019-11-23 23:22:12,562 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:22:12,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040301375] [2019-11-23 23:22:12,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:22:12,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-23 23:22:12,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571214202] [2019-11-23 23:22:12,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:22:12,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:22:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:22:12,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:22:12,591 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2019-11-23 23:22:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:22:12,683 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2019-11-23 23:22:12,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:22:12,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:22:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:22:12,697 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:22:12,698 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 23:22:12,701 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 23:22:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 23:22:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 23:22:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 23:22:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2019-11-23 23:22:12,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 7 [2019-11-23 23:22:12,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:22:12,744 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-23 23:22:12,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:22:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2019-11-23 23:22:12,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:22:12,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:22:12,745 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:22:12,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:22:12,949 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:22:12,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:22:12,950 INFO L82 PathProgramCache]: Analyzing trace with hash -369311333, now seen corresponding path program 1 times [2019-11-23 23:22:12,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:22:12,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561502831] [2019-11-23 23:22:12,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:22:12,956 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:22:12,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460646816] [2019-11-23 23:22:12,957 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 23:22:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:22:13,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:22:13,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:22:13,025 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 23:22:13,025 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:22:13,046 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 23:22:13,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561502831] [2019-11-23 23:22:13,047 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:22:13,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460646816] [2019-11-23 23:22:13,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:22:13,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-23 23:22:13,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604873374] [2019-11-23 23:22:13,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:22:13,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:22:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:22:13,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:22:13,052 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. Second operand 6 states. [2019-11-23 23:22:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:22:13,177 INFO L93 Difference]: Finished difference Result 39 states and 59 transitions. [2019-11-23 23:22:13,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:22:13,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 23:22:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:22:13,180 INFO L225 Difference]: With dead ends: 39 [2019-11-23 23:22:13,180 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 23:22:13,182 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 23:22:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 23:22:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-11-23 23:22:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 23:22:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-23 23:22:13,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-11-23 23:22:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:22:13,199 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-23 23:22:13,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:22:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-23 23:22:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 23:22:13,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:22:13,201 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:22:13,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:22:13,407 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:22:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:22:13,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1364262053, now seen corresponding path program 1 times [2019-11-23 23:22:13,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:22:13,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598920473] [2019-11-23 23:22:13,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:22:13,412 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:22:13,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647312644] [2019-11-23 23:22:13,413 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 23:22:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:22:13,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 23:22:13,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:22:13,510 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 23:22:13,511 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:22:13,562 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 23:22:13,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598920473] [2019-11-23 23:22:13,563 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:22:13,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647312644] [2019-11-23 23:22:13,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [249354241] [2019-11-23 23:22:13,589 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:22:13,590 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:22:13,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:22:13,603 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:22:13,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:22:14,017 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:14,476 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:14,486 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:14,497 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:14,507 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:15,061 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:15,078 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:15,132 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:15,150 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:15,164 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:15,238 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:15,248 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:16,540 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:16,558 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:16,627 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:16,676 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:16,745 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:16,801 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:16,931 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:16,977 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:17,022 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:17,035 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:17,050 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:17,068 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:17,135 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:17,389 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:22:17,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-23 23:22:17,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2019-11-23 23:22:17,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74767978] [2019-11-23 23:22:17,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 23:22:17,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:22:17,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 23:22:17,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-23 23:22:17,495 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2019-11-23 23:22:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:22:17,546 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-11-23 23:22:17,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:22:17,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-23 23:22:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:22:17,547 INFO L225 Difference]: With dead ends: 38 [2019-11-23 23:22:17,547 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 23:22:17,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-23 23:22:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 23:22:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-11-23 23:22:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 23:22:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2019-11-23 23:22:17,555 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15 [2019-11-23 23:22:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:22:17,555 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2019-11-23 23:22:17,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 23:22:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2019-11-23 23:22:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 23:22:17,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:22:17,556 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:22:17,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:22:17,759 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:22:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:22:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1114558409, now seen corresponding path program 1 times [2019-11-23 23:22:17,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:22:17,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175169153] [2019-11-23 23:22:17,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:22:17,765 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:22:17,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197629263] [2019-11-23 23:22:17,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:22:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:22:17,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 23:22:17,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:22:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 23:22:17,859 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:22:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 23:22:17,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175169153] [2019-11-23 23:22:17,897 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:22:17,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197629263] [2019-11-23 23:22:17,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [618160397] [2019-11-23 23:22:17,899 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:22:17,899 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:22:17,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:22:17,900 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:22:17,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:22:17,990 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,198 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,209 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,219 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,307 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,675 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,731 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,795 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,809 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,828 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,840 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:18,882 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,384 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,424 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,441 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,459 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,503 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,558 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,577 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,640 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,744 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,759 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,773 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:19,953 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 217 [2019-11-23 23:22:20,059 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 217 [2019-11-23 23:22:20,582 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,596 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,663 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,676 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,688 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,709 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,763 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,815 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,903 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,987 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:20,998 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:22:21,641 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 398 [2019-11-23 23:22:21,744 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 398 [2019-11-23 23:22:21,953 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 451 [2019-11-23 23:22:22,133 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 440 [2019-11-23 23:22:22,742 WARN L192 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 876 [2019-11-23 23:22:23,191 WARN L192 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 876 [2019-11-23 23:22:23,538 WARN L192 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 872 [2019-11-23 23:22:23,981 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 972 [2019-11-23 23:22:24,678 WARN L192 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 971 DAG size of output: 923 [2019-11-23 23:22:27,243 WARN L192 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 1894 DAG size of output: 1805 [2019-11-23 23:22:29,274 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 1894 DAG size of output: 1805 [2019-11-23 23:22:31,154 WARN L192 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1798 DAG size of output: 1795 [2019-11-23 23:22:33,503 WARN L192 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 2123 DAG size of output: 2061 [2019-11-23 23:22:37,041 WARN L192 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 2058 DAG size of output: 2055 [2019-11-23 23:22:51,078 WARN L192 SmtUtils]: Spent 13.20 s on a formula simplification. DAG size of input: 4569 DAG size of output: 4298 [2019-11-23 23:23:04,180 WARN L192 SmtUtils]: Spent 13.09 s on a formula simplification. DAG size of input: 4569 DAG size of output: 4298 [2019-11-23 23:23:14,137 WARN L192 SmtUtils]: Spent 9.94 s on a formula simplification. DAG size of input: 4261 DAG size of output: 4249 [2019-11-23 23:23:30,868 WARN L192 SmtUtils]: Spent 16.62 s on a formula simplification. DAG size of input: 5042 DAG size of output: 5002 [2019-11-23 23:23:49,290 WARN L192 SmtUtils]: Spent 13.32 s on a formula simplification. DAG size of input: 4992 DAG size of output: 4935