/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 -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:23:25,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:23:25,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:23:25,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:23:25,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:23:25,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:23:25,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:23:25,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:23:25,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:23:25,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:23:25,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:23:25,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:23:25,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:23:25,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:23:25,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:23:25,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:23:25,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:23:25,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:23:25,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:23:25,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:23:25,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:23:25,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:23:25,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:23:25,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:23:25,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:23:25,659 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 04:23:25,674 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:23:25,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:23:25,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:23:25,675 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:23:25,675 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:23:25,676 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:23:25,676 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:23:25,676 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:23:25,676 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:23:25,676 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:23:25,677 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:23:25,677 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:23:25,677 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:23:25,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:23:25,677 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:23:25,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:23:25,678 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:23:25,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:23:25,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:23:25,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:23:25,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:23:25,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:23:25,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:23:25,680 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:23:25,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:23:25,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:23:25,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:23:25,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:23:25,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:23:25,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:23:25,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:23:25,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:23:25,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:23:25,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:23:25,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:23:25,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:23:25,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:23:25,682 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:23:25,966 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:23:25,979 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:23:25,983 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:23:25,984 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:23:25,985 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:23:25,986 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2019-11-24 04:23:26,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35147536d/267999cb7e69457780394ddc5b88775e/FLAG47d673711 [2019-11-24 04:23:26,478 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:23:26,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2019-11-24 04:23:26,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35147536d/267999cb7e69457780394ddc5b88775e/FLAG47d673711 [2019-11-24 04:23:26,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35147536d/267999cb7e69457780394ddc5b88775e [2019-11-24 04:23:26,882 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:23:26,884 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:23:26,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:23:26,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:23:26,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:23:26,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:23:26" (1/1) ... [2019-11-24 04:23:26,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2add6abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:26, skipping insertion in model container [2019-11-24 04:23:26,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:23:26" (1/1) ... [2019-11-24 04:23:26,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:23:26,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:23:27,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:23:27,091 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:23:27,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:23:27,123 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:23:27,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27 WrapperNode [2019-11-24 04:23:27,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:23:27,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:23:27,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:23:27,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:23:27,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (1/1) ... [2019-11-24 04:23:27,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (1/1) ... [2019-11-24 04:23:27,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:23:27,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:23:27,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:23:27,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:23:27,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (1/1) ... [2019-11-24 04:23:27,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (1/1) ... [2019-11-24 04:23:27,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (1/1) ... [2019-11-24 04:23:27,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (1/1) ... [2019-11-24 04:23:27,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (1/1) ... [2019-11-24 04:23:27,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (1/1) ... [2019-11-24 04:23:27,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (1/1) ... [2019-11-24 04:23:27,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:23:27,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:23:27,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:23:27,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:23:27,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (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 04:23:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:23:27,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:23:27,537 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:23:27,538 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:23:27,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:23:27 BoogieIcfgContainer [2019-11-24 04:23:27,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:23:27,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:23:27,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:23:27,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:23:27,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:23:26" (1/3) ... [2019-11-24 04:23:27,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afc90f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:23:27, skipping insertion in model container [2019-11-24 04:23:27,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:27" (2/3) ... [2019-11-24 04:23:27,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afc90f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:23:27, skipping insertion in model container [2019-11-24 04:23:27,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:23:27" (3/3) ... [2019-11-24 04:23:27,546 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2019-11-24 04:23:27,556 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:23:27,563 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:23:27,574 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:23:27,598 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:23:27,598 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:23:27,598 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:23:27,598 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:23:27,598 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:23:27,599 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:23:27,599 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:23:27,599 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:23:27,611 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-24 04:23:27,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:23:27,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:23:27,617 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:23:27,617 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:23:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:23:27,622 INFO L82 PathProgramCache]: Analyzing trace with hash 29768674, now seen corresponding path program 1 times [2019-11-24 04:23:27,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:23:27,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604403950] [2019-11-24 04:23:27,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:23:27,712 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:23:27,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679454601] [2019-11-24 04:23:27,713 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 04:23:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:23:27,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:23:27,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:23:27,827 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 04:23:27,828 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:23:27,843 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 04:23:27,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604403950] [2019-11-24 04:23:27,844 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:23:27,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679454601] [2019-11-24 04:23:27,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:23:27,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-24 04:23:27,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808602951] [2019-11-24 04:23:27,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:23:27,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:23:27,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:23:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:23:27,872 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2019-11-24 04:23:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:23:27,914 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-11-24 04:23:27,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:23:27,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-24 04:23:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:23:27,926 INFO L225 Difference]: With dead ends: 16 [2019-11-24 04:23:27,926 INFO L226 Difference]: Without dead ends: 7 [2019-11-24 04:23:27,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:23:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-24 04:23:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-24 04:23:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 04:23:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-24 04:23:27,979 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-24 04:23:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:23:27,979 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-24 04:23:27,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:23:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-24 04:23:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:23:27,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:23:27,981 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:23:28,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:23:28,184 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:23:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:23:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash 922753899, now seen corresponding path program 1 times [2019-11-24 04:23:28,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:23:28,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901348783] [2019-11-24 04:23:28,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:23:28,212 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:23:28,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267294680] [2019-11-24 04:23:28,213 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 04:23:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:23:28,258 WARN L253 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-24 04:23:28,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:23:28,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:23:28,328 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 04:23:28,329 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:23:28,439 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 04:23:28,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901348783] [2019-11-24 04:23:28,440 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:23:28,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267294680] [2019-11-24 04:23:28,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701670113] [2019-11-24 04:23:28,466 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-24 04:23:28,467 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:23:28,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:23:28,481 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:23:28,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:23:30,977 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 338 [2019-11-24 04:23:31,465 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 390 [2019-11-24 04:23:31,741 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 415 [2019-11-24 04:23:32,078 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 443 [2019-11-24 04:23:32,446 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 446 [2019-11-24 04:23:32,790 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 480 [2019-11-24 04:23:32,975 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 473 [2019-11-24 04:23:33,194 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 512 [2019-11-24 04:23:33,383 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 505 [2019-11-24 04:23:33,630 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 543 [2019-11-24 04:23:33,835 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 540 DAG size of output: 535 [2019-11-24 04:23:34,100 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 578 [2019-11-24 04:23:34,301 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 575 [2019-11-24 04:23:34,527 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 580 [2019-11-24 04:23:34,667 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 580 [2019-11-24 04:23:34,929 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 586 [2019-11-24 04:23:35,073 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 587 DAG size of output: 586 [2019-11-24 04:23:35,273 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 592 [2019-11-24 04:23:35,419 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 592 [2019-11-24 04:23:35,646 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 598 [2019-11-24 04:23:35,787 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 599 [2019-11-24 04:23:36,088 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 686 [2019-11-24 04:23:36,596 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 676 [2019-11-24 04:23:37,072 WARN L192 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 680 [2019-11-24 04:23:37,304 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 680 [2019-11-24 04:23:37,584 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 686 [2019-11-24 04:23:37,779 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 686 [2019-11-24 04:23:38,105 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 692 [2019-11-24 04:23:38,325 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 693 [2019-11-24 04:23:38,656 WARN L192 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 793 [2019-11-24 04:23:38,979 WARN L192 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 790 [2019-11-24 04:23:39,496 WARN L192 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 946 DAG size of output: 903 [2019-11-24 04:23:39,949 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 892 [2019-11-24 04:23:40,448 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 890 [2019-11-24 04:23:40,856 WARN L192 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 891 DAG size of output: 891 [2019-11-24 04:23:41,468 WARN L192 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 1076 DAG size of output: 1028 [2019-11-24 04:23:42,102 WARN L192 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 1029 DAG size of output: 1029 [2019-11-24 04:23:43,103 WARN L192 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 1256 DAG size of output: 1202 [2019-11-24 04:23:44,137 WARN L192 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 1198 DAG size of output: 1197 [2019-11-24 04:23:45,656 WARN L192 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 1469 DAG size of output: 1413 [2019-11-24 04:23:47,327 WARN L192 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1402 DAG size of output: 1389 [2019-11-24 04:23:49,043 WARN L192 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 1384 [2019-11-24 04:23:50,682 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1385 DAG size of output: 1384 [2019-11-24 04:23:52,482 WARN L192 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 1390 [2019-11-24 04:23:54,114 WARN L192 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 1391 DAG size of output: 1390 [2019-11-24 04:23:55,883 WARN L192 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 1396 [2019-11-24 04:23:57,743 WARN L192 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 1397 DAG size of output: 1396 [2019-11-24 04:23:59,488 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 1401 [2019-11-24 04:24:01,187 WARN L192 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 1402 DAG size of output: 1401 [2019-11-24 04:24:02,943 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 1407 [2019-11-24 04:24:04,588 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1408 DAG size of output: 1407 [2019-11-24 04:24:06,335 WARN L192 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 1413 [2019-11-24 04:24:07,944 WARN L192 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 1414 DAG size of output: 1413 [2019-11-24 04:24:09,687 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 1419 [2019-11-24 04:24:11,317 WARN L192 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 1420 DAG size of output: 1419 [2019-11-24 04:24:13,143 WARN L192 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 1425 [2019-11-24 04:24:14,781 WARN L192 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 1426 DAG size of output: 1425 [2019-11-24 04:24:16,514 WARN L192 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 1431 [2019-11-24 04:24:18,223 WARN L192 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 1432 DAG size of output: 1431 [2019-11-24 04:24:19,942 WARN L192 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 1437 [2019-11-24 04:24:21,614 WARN L192 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 1438 DAG size of output: 1437 [2019-11-24 04:24:23,413 WARN L192 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 1443 [2019-11-24 04:24:25,060 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1444 DAG size of output: 1444 [2019-11-24 04:24:27,431 WARN L192 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 1796 DAG size of output: 1740 [2019-11-24 04:24:30,106 WARN L192 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 1732 DAG size of output: 1729 [2019-11-24 04:24:32,769 WARN L192 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 1733 [2019-11-24 04:24:35,348 WARN L192 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 1734 DAG size of output: 1734 [2019-11-24 04:24:39,593 WARN L192 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 2131 DAG size of output: 2075 [2019-11-24 04:24:44,057 WARN L192 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 2070 DAG size of output: 2067 [2019-11-24 04:24:48,646 WARN L192 SmtUtils]: Spent 4.41 s on a formula simplification that was a NOOP. DAG size: 2071 [2019-11-24 04:24:53,143 WARN L192 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 2072 DAG size of output: 2071 [2019-11-24 04:24:57,513 WARN L192 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 2077 [2019-11-24 04:25:01,792 WARN L192 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 2078 DAG size of output: 2078 [2019-11-24 04:25:08,306 WARN L192 SmtUtils]: Spent 6.42 s on a formula simplification. DAG size of input: 2529 DAG size of output: 2464