/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/list-simple/sll2c_update_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:11:21,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:11:21,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:11:21,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:11:21,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:11:21,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:11:21,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:11:21,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:11:21,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:11:21,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:11:21,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:11:21,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:11:21,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:11:21,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:11:21,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:11:21,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:11:21,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:11:21,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:11:21,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:11:21,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:11:21,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:11:21,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:11:21,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:11:21,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:11:21,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:11:21,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:11:21,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:11:21,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:11:21,669 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 04:11:21,690 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:11:21,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:11:21,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:11:21,691 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:11:21,692 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:11:21,692 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:11:21,692 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:11:21,692 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:11:21,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:11:21,693 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:11:21,694 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:11:21,694 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:11:21,694 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:11:21,695 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:11:21,695 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:11:21,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:11:21,696 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:11:21,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:11:21,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:11:21,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:11:21,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:11:21,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:11:21,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:11:21,697 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:11:21,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:11:21,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:11:21,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:11:21,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:11:21,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:11:21,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:11:21,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:11:21,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:11:21,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:11:21,700 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:11:21,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:11:21,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:11:21,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:11:21,701 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:11:21,958 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:11:21,974 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:11:21,978 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:11:21,979 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:11:21,979 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:11:21,980 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_update_all.i [2019-11-24 04:11:22,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df0aa2edf/29cb7f68f09a48b2af2f908c5041f4cc/FLAGf00136907 [2019-11-24 04:11:22,612 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:11:22,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_update_all.i [2019-11-24 04:11:22,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df0aa2edf/29cb7f68f09a48b2af2f908c5041f4cc/FLAGf00136907 [2019-11-24 04:11:22,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df0aa2edf/29cb7f68f09a48b2af2f908c5041f4cc [2019-11-24 04:11:22,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:11:22,880 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:11:22,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:11:22,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:11:22,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:11:22,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:11:22" (1/1) ... [2019-11-24 04:11:22,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c910224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:22, skipping insertion in model container [2019-11-24 04:11:22,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:11:22" (1/1) ... [2019-11-24 04:11:22,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:11:22,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:11:23,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:11:23,403 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:11:23,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:11:23,526 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:11:23,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23 WrapperNode [2019-11-24 04:11:23,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:11:23,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:11:23,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:11:23,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:11:23,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (1/1) ... [2019-11-24 04:11:23,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (1/1) ... [2019-11-24 04:11:23,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:11:23,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:11:23,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:11:23,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:11:23,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (1/1) ... [2019-11-24 04:11:23,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (1/1) ... [2019-11-24 04:11:23,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (1/1) ... [2019-11-24 04:11:23,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (1/1) ... [2019-11-24 04:11:23,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (1/1) ... [2019-11-24 04:11:23,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (1/1) ... [2019-11-24 04:11:23,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (1/1) ... [2019-11-24 04:11:23,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:11:23,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:11:23,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:11:23,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:11:23,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (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 04:11:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:11:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:11:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:11:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:11:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:11:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:11:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:11:23,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:11:24,295 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:11:24,295 INFO L284 CfgBuilder]: Removed 26 assume(true) statements. [2019-11-24 04:11:24,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:11:24 BoogieIcfgContainer [2019-11-24 04:11:24,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:11:24,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:11:24,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:11:24,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:11:24,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:11:22" (1/3) ... [2019-11-24 04:11:24,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dad40b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:11:24, skipping insertion in model container [2019-11-24 04:11:24,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:11:23" (2/3) ... [2019-11-24 04:11:24,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dad40b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:11:24, skipping insertion in model container [2019-11-24 04:11:24,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:11:24" (3/3) ... [2019-11-24 04:11:24,313 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2019-11-24 04:11:24,323 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:11:24,332 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:11:24,344 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:11:24,375 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:11:24,376 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:11:24,376 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:11:24,376 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:11:24,376 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:11:24,376 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:11:24,377 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:11:24,377 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:11:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-24 04:11:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:11:24,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:11:24,403 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:11:24,404 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:11:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:11:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash 992647339, now seen corresponding path program 1 times [2019-11-24 04:11:24,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:11:24,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750615062] [2019-11-24 04:11:24,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:11:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:11:24,616 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 04:11:24,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750615062] [2019-11-24 04:11:24,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:11:24,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:11:24,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075630966] [2019-11-24 04:11:24,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:11:24,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:11:24,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:11:24,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:11:24,642 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-24 04:11:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:11:24,691 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2019-11-24 04:11:24,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:11:24,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:11:24,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:11:24,702 INFO L225 Difference]: With dead ends: 33 [2019-11-24 04:11:24,703 INFO L226 Difference]: Without dead ends: 13 [2019-11-24 04:11:24,706 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:11:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-24 04:11:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-24 04:11:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-24 04:11:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-24 04:11:24,742 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2019-11-24 04:11:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:11:24,743 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-24 04:11:24,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:11:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-11-24 04:11:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:11:24,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:11:24,744 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:11:24,745 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:11:24,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:11:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash 114583931, now seen corresponding path program 1 times [2019-11-24 04:11:24,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:11:24,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808981156] [2019-11-24 04:11:24,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:11:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:11:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:11:24,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808981156] [2019-11-24 04:11:24,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:11:24,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:11:24,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570644167] [2019-11-24 04:11:24,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:11:24,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:11:24,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:11:24,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:11:24,849 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 4 states. [2019-11-24 04:11:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:11:24,903 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2019-11-24 04:11:24,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:11:24,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-24 04:11:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:11:24,909 INFO L225 Difference]: With dead ends: 24 [2019-11-24 04:11:24,909 INFO L226 Difference]: Without dead ends: 19 [2019-11-24 04:11:24,910 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 04:11:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-24 04:11:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2019-11-24 04:11:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-24 04:11:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2019-11-24 04:11:24,915 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2019-11-24 04:11:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:11:24,916 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-11-24 04:11:24,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:11:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2019-11-24 04:11:24,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:11:24,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:11:24,917 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:11:24,917 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:11:24,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:11:24,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1436073605, now seen corresponding path program 1 times [2019-11-24 04:11:24,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:11:24,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240446981] [2019-11-24 04:11:24,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:11:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:11:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:11:25,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240446981] [2019-11-24 04:11:25,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818048969] [2019-11-24 04:11:25,030 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 04:11:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:11:25,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 04:11:25,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:11:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:11:25,203 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:11:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:11:25,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369321268] [2019-11-24 04:11:25,279 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-24 04:11:25,279 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:11:25,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:11:25,292 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:11:25,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:11:25,493 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:25,839 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:26,188 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:26,385 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:26,571 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:27,196 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 188 [2019-11-24 04:11:27,326 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:27,589 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:28,261 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:11:28,308 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:11:29,131 WARN L192 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 109 [2019-11-24 04:11:29,436 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2019-11-24 04:11:31,062 WARN L192 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 185 DAG size of output: 139 [2019-11-24 04:11:32,712 WARN L192 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 186 DAG size of output: 133 [2019-11-24 04:11:32,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:11:32,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4, 4] total 12 [2019-11-24 04:11:32,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597316834] [2019-11-24 04:11:32,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 04:11:32,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:11:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 04:11:32,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-24 04:11:32,718 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 7 states. [2019-11-24 04:11:33,127 WARN L192 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 78 [2019-11-24 04:11:33,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:11:33,282 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2019-11-24 04:11:33,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:11:33,283 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-24 04:11:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:11:33,284 INFO L225 Difference]: With dead ends: 20 [2019-11-24 04:11:33,284 INFO L226 Difference]: Without dead ends: 15 [2019-11-24 04:11:33,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-24 04:11:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-24 04:11:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-24 04:11:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-24 04:11:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2019-11-24 04:11:33,295 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2019-11-24 04:11:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:11:33,296 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2019-11-24 04:11:33,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-24 04:11:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2019-11-24 04:11:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:11:33,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:11:33,297 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:11:33,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:11:33,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:11:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:11:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1355958553, now seen corresponding path program 1 times [2019-11-24 04:11:33,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:11:33,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832134663] [2019-11-24 04:11:33,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:11:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:11:33,592 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 04:11:33,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832134663] [2019-11-24 04:11:33,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:11:33,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:11:33,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102352555] [2019-11-24 04:11:33,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:11:33,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:11:33,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:11:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:11:33,595 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 4 states. [2019-11-24 04:11:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:11:33,638 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-11-24 04:11:33,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:11:33,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-24 04:11:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:11:33,639 INFO L225 Difference]: With dead ends: 29 [2019-11-24 04:11:33,639 INFO L226 Difference]: Without dead ends: 22 [2019-11-24 04:11:33,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:11:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-24 04:11:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2019-11-24 04:11:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 04:11:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2019-11-24 04:11:33,649 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 13 [2019-11-24 04:11:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:11:33,650 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2019-11-24 04:11:33,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:11:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2019-11-24 04:11:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:11:33,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:11:33,651 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:11:33,651 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:11:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:11:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash -326377753, now seen corresponding path program 2 times [2019-11-24 04:11:33,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:11:33,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144306873] [2019-11-24 04:11:33,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:11:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:11:34,122 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 04:11:34,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144306873] [2019-11-24 04:11:34,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050931911] [2019-11-24 04:11:34,123 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 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 04:11:34,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-24 04:11:34,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:11:34,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 89 conjunts are in the unsatisfiable core [2019-11-24 04:11:34,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:11:34,870 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 04:11:34,870 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:11:35,512 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2019-11-24 04:11:35,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:11:35,909 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: This case should habe been handled by DER at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:192) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.(DerPreprocessor.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:291) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-24 04:11:35,914 INFO L168 Benchmark]: Toolchain (without parser) took 13034.02 ms. Allocated memory was 138.9 MB in the beginning and 385.4 MB in the end (delta: 246.4 MB). Free memory was 102.3 MB in the beginning and 170.6 MB in the end (delta: -68.3 MB). Peak memory consumption was 178.1 MB. Max. memory is 7.1 GB. [2019-11-24 04:11:35,915 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-11-24 04:11:35,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 646.07 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.1 MB in the beginning and 166.8 MB in the end (delta: -64.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2019-11-24 04:11:35,916 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.51 ms. Allocated memory is still 203.4 MB. Free memory was 166.1 MB in the beginning and 164.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-11-24 04:11:35,916 INFO L168 Benchmark]: Boogie Preprocessor took 47.09 ms. Allocated memory is still 203.4 MB. Free memory was 164.2 MB in the beginning and 162.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-11-24 04:11:35,916 INFO L168 Benchmark]: RCFGBuilder took 667.29 ms. Allocated memory is still 203.4 MB. Free memory was 162.2 MB in the beginning and 122.1 MB in the end (delta: 40.1 MB). Peak memory consumption was 40.1 MB. Max. memory is 7.1 GB. [2019-11-24 04:11:35,917 INFO L168 Benchmark]: TraceAbstraction took 11613.50 ms. Allocated memory was 203.4 MB in the beginning and 385.4 MB in the end (delta: 181.9 MB). Free memory was 122.1 MB in the beginning and 170.6 MB in the end (delta: -48.5 MB). Peak memory consumption was 133.4 MB. Max. memory is 7.1 GB. [2019-11-24 04:11:35,919 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 646.07 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.1 MB in the beginning and 166.8 MB in the end (delta: -64.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 54.51 ms. Allocated memory is still 203.4 MB. Free memory was 166.1 MB in the beginning and 164.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.09 ms. Allocated memory is still 203.4 MB. Free memory was 164.2 MB in the beginning and 162.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 667.29 ms. Allocated memory is still 203.4 MB. Free memory was 162.2 MB in the beginning and 122.1 MB in the end (delta: 40.1 MB). Peak memory consumption was 40.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11613.50 ms. Allocated memory was 203.4 MB in the beginning and 385.4 MB in the end (delta: 181.9 MB). Free memory was 122.1 MB in the beginning and 170.6 MB in the end (delta: -48.5 MB). Peak memory consumption was 133.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: This case should habe been handled by DER: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...