/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/nla-digbench/prodbin.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:30:23,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:30:23,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:30:23,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:30:23,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:30:23,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:30:23,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:30:23,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:30:23,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:30:23,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:30:23,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:30:23,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:30:23,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:30:23,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:30:23,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:30:23,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:30:23,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:30:23,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:30:23,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:30:23,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:30:23,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:30:23,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:30:23,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:30:23,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:30:23,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:30:23,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:30:23,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:30:23,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:30:23,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:30:23,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:30:23,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:30:23,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:30:23,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:30:23,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:30:23,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:30:23,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:30:23,484 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 04:30:23,503 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:30:23,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:30:23,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:30:23,504 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:30:23,505 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:30:23,505 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:30:23,505 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:30:23,505 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:30:23,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:30:23,505 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:30:23,506 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:30:23,506 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:30:23,506 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:30:23,506 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:30:23,506 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:30:23,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:30:23,507 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:30:23,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:30:23,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:30:23,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:30:23,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:30:23,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:30:23,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:30:23,509 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:30:23,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:30:23,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:30:23,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:30:23,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:30:23,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:30:23,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:30:23,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:30:23,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:30:23,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:30:23,511 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:30:23,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:30:23,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:30:23,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:30:23,511 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:30:23,769 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:30:23,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:30:23,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:30:23,786 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:30:23,787 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:30:23,787 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin.c [2019-11-24 04:30:23,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5dcb24c3/fc686da334314da5bb4453087be10079/FLAG63606f09f [2019-11-24 04:30:24,258 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:30:24,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin.c [2019-11-24 04:30:24,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5dcb24c3/fc686da334314da5bb4453087be10079/FLAG63606f09f [2019-11-24 04:30:24,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5dcb24c3/fc686da334314da5bb4453087be10079 [2019-11-24 04:30:24,682 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:30:24,684 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:30:24,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:30:24,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:30:24,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:30:24,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:24,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f1426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24, skipping insertion in model container [2019-11-24 04:30:24,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:24,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:30:24,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:30:24,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:30:24,924 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:30:24,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:30:24,953 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:30:24,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24 WrapperNode [2019-11-24 04:30:24,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:30:24,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:30:24,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:30:24,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:30:24,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:25,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:25,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:30:25,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:30:25,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:30:25,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:30:25,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:25,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:25,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:25,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:25,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:25,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:25,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (1/1) ... [2019-11-24 04:30:25,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:30:25,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:30:25,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:30:25,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:30:25,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (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 04:30:25,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:30:25,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:30:25,418 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:30:25,418 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 04:30:25,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:30:25 BoogieIcfgContainer [2019-11-24 04:30:25,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:30:25,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:30:25,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:30:25,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:30:25,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:30:24" (1/3) ... [2019-11-24 04:30:25,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f71f782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:30:25, skipping insertion in model container [2019-11-24 04:30:25,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:24" (2/3) ... [2019-11-24 04:30:25,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f71f782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:30:25, skipping insertion in model container [2019-11-24 04:30:25,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:30:25" (3/3) ... [2019-11-24 04:30:25,433 INFO L109 eAbstractionObserver]: Analyzing ICFG prodbin.c [2019-11-24 04:30:25,446 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:30:25,455 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:30:25,469 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:30:25,496 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:30:25,496 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:30:25,496 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:30:25,496 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:30:25,497 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:30:25,497 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:30:25,497 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:30:25,497 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:30:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-24 04:30:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:30:25,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:30:25,520 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:30:25,521 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:30:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:30:25,529 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-24 04:30:25,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:30:25,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509173040] [2019-11-24 04:30:25,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:30:25,611 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:30:25,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986112855] [2019-11-24 04:30:25,612 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 04:30:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:30:25,654 WARN L253 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 04:30:25,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:30:25,729 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 04:30:25,729 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:30:25,755 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 04:30:25,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509173040] [2019-11-24 04:30:25,757 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:30:25,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986112855] [2019-11-24 04:30:25,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:30:25,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-24 04:30:25,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660042275] [2019-11-24 04:30:25,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:30:25,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:30:25,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:30:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:30:25,780 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 6 states. [2019-11-24 04:30:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:30:25,933 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2019-11-24 04:30:25,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 04:30:25,935 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-11-24 04:30:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:30:25,946 INFO L225 Difference]: With dead ends: 36 [2019-11-24 04:30:25,946 INFO L226 Difference]: Without dead ends: 21 [2019-11-24 04:30:25,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:30:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-24 04:30:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2019-11-24 04:30:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-24 04:30:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-24 04:30:25,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 4 [2019-11-24 04:30:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:30:25,988 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-24 04:30:25,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:30:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-24 04:30:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:30:25,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:30:25,990 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-24 04:30:26,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:30:26,194 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:30:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:30:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 289372774, now seen corresponding path program 1 times [2019-11-24 04:30:26,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:30:26,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51891785] [2019-11-24 04:30:26,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:30:26,204 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:30:26,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145237563] [2019-11-24 04:30:26,205 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) [2019-11-24 04:30:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:30:26,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-24 04:30:26,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:30:26,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:30:26,370 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:30:26,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:30:26,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51891785] [2019-11-24 04:30:26,454 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:30:26,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145237563] [2019-11-24 04:30:26,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:30:26,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-24 04:30:26,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010100542] [2019-11-24 04:30:26,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-24 04:30:26,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:30:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-24 04:30:26,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:30:26,459 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2019-11-24 04:30:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:30:26,713 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-24 04:30:26,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:30:26,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2019-11-24 04:30:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:30:26,714 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:30:26,714 INFO L226 Difference]: Without dead ends: 11 [2019-11-24 04:30:26,718 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:30:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-24 04:30:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-24 04:30:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:30:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-24 04:30:26,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 10 [2019-11-24 04:30:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:30:26,729 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-24 04:30:26,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-24 04:30:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-24 04:30:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:30:26,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:30:26,730 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2019-11-24 04:30:26,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:30:26,931 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:30:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:30:26,932 INFO L82 PathProgramCache]: Analyzing trace with hash 290300268, now seen corresponding path program 1 times [2019-11-24 04:30:26,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:30:26,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668260703] [2019-11-24 04:30:26,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:30:26,937 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:30:26,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95547018] [2019-11-24 04:30:26,938 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 [2019-11-24 04:30:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:30:26,970 WARN L253 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-24 04:30:26,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:30:27,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,140 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2019-11-24 04:30:27,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:27,642 WARN L192 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 57 [2019-11-24 04:30:27,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:30:28,288 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:30:28,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:28,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:28,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:33,454 WARN L192 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2019-11-24 04:30:39,286 WARN L192 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-24 04:30:39,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:39,600 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2019-11-24 04:30:39,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:39,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:39,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:39,838 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2019-11-24 04:30:39,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:30:40,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668260703] [2019-11-24 04:30:40,037 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:30:40,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95547018] [2019-11-24 04:30:40,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907559868] [2019-11-24 04:30:40,063 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-24 04:30:40,063 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:30:40,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:30:40,077 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:30:40,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:30:40,232 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2019-11-24 04:30:42,429 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:30:42,589 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:30:42,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-24 04:30:42,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2019-11-24 04:30:42,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759043150] [2019-11-24 04:30:42,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-24 04:30:42,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:30:42,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-24 04:30:42,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=252, Unknown=1, NotChecked=0, Total=342 [2019-11-24 04:30:42,595 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 16 states. [2019-11-24 04:30:53,057 WARN L192 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2019-11-24 04:30:59,051 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2019-11-24 04:31:09,030 WARN L192 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2019-11-24 04:31:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:31:09,033 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-24 04:31:09,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-24 04:31:09,034 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2019-11-24 04:31:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:31:09,035 INFO L225 Difference]: With dead ends: 24 [2019-11-24 04:31:09,035 INFO L226 Difference]: Without dead ends: 22 [2019-11-24 04:31:09,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=146, Invalid=401, Unknown=5, NotChecked=0, Total=552 [2019-11-24 04:31:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-24 04:31:09,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-24 04:31:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-24 04:31:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-24 04:31:09,042 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2019-11-24 04:31:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:31:09,042 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-24 04:31:09,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-24 04:31:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-24 04:31:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 04:31:09,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:31:09,043 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1] [2019-11-24 04:31:09,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:31:09,247 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:31:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:31:09,248 INFO L82 PathProgramCache]: Analyzing trace with hash -259792835, now seen corresponding path program 2 times [2019-11-24 04:31:09,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:31:09,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116127072] [2019-11-24 04:31:09,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:31:09,266 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:31:09,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052294505] [2019-11-24 04:31:09,266 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-24 04:31:09,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-24 04:31:09,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:31:09,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-24 04:31:09,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:31:09,766 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 30 [2019-11-24 04:31:15,606 WARN L192 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 188 DAG size of output: 40 [2019-11-24 04:31:35,470 WARN L192 SmtUtils]: Spent 13.64 s on a formula simplification. DAG size of input: 157 DAG size of output: 53 [2019-11-24 04:31:36,377 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 65