/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/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:24:19,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:24:19,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:24:19,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:24:19,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:24:19,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:24:19,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:24:19,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:24:19,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:24:19,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:24:19,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:24:19,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:24:19,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:24:19,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:24:19,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:24:19,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:24:19,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:24:19,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:24:19,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:24:19,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:24:19,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:24:19,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:24:19,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:24:19,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:24:19,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:24:19,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:24:19,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:24:19,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:24:19,447 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 [2019-11-24 04:24:19,468 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:24:19,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:24:19,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:24:19,469 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:24:19,470 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:24:19,470 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:24:19,470 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:24:19,470 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:24:19,470 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:24:19,471 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:24:19,471 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:24:19,471 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:24:19,471 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:24:19,471 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:24:19,472 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:24:19,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:24:19,473 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:24:19,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:24:19,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:24:19,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:24:19,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:24:19,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:24:19,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:24:19,474 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:24:19,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:24:19,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:24:19,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:24:19,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:24:19,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:24:19,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:24:19,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:24:19,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:24:19,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:24:19,476 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:24:19,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:24:19,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:24:19,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:24:19,477 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:24:19,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:24:19,768 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:24:19,771 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:24:19,773 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:24:19,773 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:24:19,774 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-11-24 04:24:19,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8cb0336b/1e718b267cf448afb26723f9adcdb09b/FLAGa08fe9d7b [2019-11-24 04:24:20,266 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:24:20,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-11-24 04:24:20,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8cb0336b/1e718b267cf448afb26723f9adcdb09b/FLAGa08fe9d7b [2019-11-24 04:24:20,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8cb0336b/1e718b267cf448afb26723f9adcdb09b [2019-11-24 04:24:20,683 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:24:20,685 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:24:20,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:24:20,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:24:20,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:24:20,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:20,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@958021d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20, skipping insertion in model container [2019-11-24 04:24:20,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:20,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:24:20,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:24:20,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:24:20,900 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:24:20,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:24:20,929 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:24:20,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20 WrapperNode [2019-11-24 04:24:20,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:24:20,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:24:20,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:24:20,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:24:20,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:20,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:21,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:24:21,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:24:21,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:24:21,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:24:21,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:21,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:21,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:21,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:21,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:21,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:21,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (1/1) ... [2019-11-24 04:24:21,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:24:21,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:24:21,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:24:21,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:24:21,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (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 [2019-11-24 04:24:21,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:24:21,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:24:21,304 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:24:21,305 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-24 04:24:21,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:24:21 BoogieIcfgContainer [2019-11-24 04:24:21,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:24:21,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:24:21,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:24:21,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:24:21,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:24:20" (1/3) ... [2019-11-24 04:24:21,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1372280a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:24:21, skipping insertion in model container [2019-11-24 04:24:21,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:20" (2/3) ... [2019-11-24 04:24:21,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1372280a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:24:21, skipping insertion in model container [2019-11-24 04:24:21,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:24:21" (3/3) ... [2019-11-24 04:24:21,314 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-11-24 04:24:21,326 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:24:21,332 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:24:21,344 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:24:21,368 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:24:21,369 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:24:21,369 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:24:21,369 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:24:21,369 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:24:21,369 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:24:21,369 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:24:21,370 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:24:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-24 04:24:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:24:21,388 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:24:21,389 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:24:21,389 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:24:21,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:24:21,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1724589170, now seen corresponding path program 1 times [2019-11-24 04:24:21,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:24:21,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386285623] [2019-11-24 04:24:21,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:24:21,467 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:24:21,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425376623] [2019-11-24 04:24:21,468 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 [2019-11-24 04:24:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:21,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:24:21,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:24:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:21,576 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:24:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:21,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386285623] [2019-11-24 04:24:21,639 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:24:21,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425376623] [2019-11-24 04:24:21,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:24:21,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-11-24 04:24:21,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774402526] [2019-11-24 04:24:21,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:24:21,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:24:21,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:24:21,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:24:21,673 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 5 states. [2019-11-24 04:24:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:24:21,728 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2019-11-24 04:24:21,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:24:21,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-24 04:24:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:24:21,740 INFO L225 Difference]: With dead ends: 17 [2019-11-24 04:24:21,740 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 04:24:21,743 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:24:21,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 04:24:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-24 04:24:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-24 04:24:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-24 04:24:21,777 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-24 04:24:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:24:21,778 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-24 04:24:21,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:24:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-24 04:24:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:24:21,778 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:24:21,779 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:24:21,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:24:21,980 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:24:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:24:21,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1922594244, now seen corresponding path program 1 times [2019-11-24 04:24:21,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:24:21,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240086528] [2019-11-24 04:24:21,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:24:21,997 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:24:21,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685881362] [2019-11-24 04:24:21,998 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 [2019-11-24 04:24:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:22,033 WARN L253 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-24 04:24:22,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:24:22,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:24:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:22,125 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:24:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:22,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240086528] [2019-11-24 04:24:22,406 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:24:22,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685881362] [2019-11-24 04:24:22,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110062344] [2019-11-24 04:24:22,426 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-24 04:24:22,427 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:24:22,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:24:22,440 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:24:22,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:24:23,482 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 214 [2019-11-24 04:24:23,628 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 202 [2019-11-24 04:24:23,830 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 273 [2019-11-24 04:24:24,000 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 271 [2019-11-24 04:24:24,238 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 336 [2019-11-24 04:24:24,486 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 336 [2019-11-24 04:24:24,793 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 421 [2019-11-24 04:24:25,139 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 422 [2019-11-24 04:24:25,666 WARN L192 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 571 [2019-11-24 04:24:26,320 WARN L192 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 558 [2019-11-24 04:24:27,104 WARN L192 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 694 [2019-11-24 04:24:27,837 WARN L192 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 680 [2019-11-24 04:24:28,807 WARN L192 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 908 DAG size of output: 904 [2019-11-24 04:24:30,308 WARN L192 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 896 DAG size of output: 884 [2019-11-24 04:24:31,914 WARN L192 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 1128 DAG size of output: 1124 [2019-11-24 04:24:33,642 WARN L192 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1115 DAG size of output: 1114 [2019-11-24 04:24:36,342 WARN L192 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 1443 DAG size of output: 1441 [2019-11-24 04:24:39,460 WARN L192 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 1442 DAG size of output: 1384 [2019-11-24 04:24:42,933 WARN L192 SmtUtils]: Spent 3.24 s on a formula simplification that was a NOOP. DAG size: 1333 [2019-11-24 04:24:45,766 WARN L192 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 1334 DAG size of output: 1334 [2019-11-24 04:24:50,501 WARN L192 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 1759 DAG size of output: 1749 [2019-11-24 04:24:55,620 WARN L192 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 1725 DAG size of output: 1722 [2019-11-24 04:25:00,581 WARN L192 SmtUtils]: Spent 4.75 s on a formula simplification that was a NOOP. DAG size: 1726 [2019-11-24 04:25:05,625 WARN L192 SmtUtils]: Spent 5.04 s on a formula simplification. DAG size of input: 1727 DAG size of output: 1727 [2019-11-24 04:25:13,957 WARN L192 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 2336 DAG size of output: 2329 [2019-11-24 04:25:22,781 WARN L192 SmtUtils]: Spent 8.66 s on a formula simplification. DAG size of input: 2317 DAG size of output: 2317 [2019-11-24 04:25:39,087 WARN L192 SmtUtils]: Spent 16.13 s on a formula simplification. DAG size of input: 3164 DAG size of output: 3157 [2019-11-24 04:25:56,398 WARN L192 SmtUtils]: Spent 17.08 s on a formula simplification. DAG size of input: 3148 DAG size of output: 3145