/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/ssh-simplified/s3_clnt_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:00:28,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:00:28,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:00:28,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 06:00:28,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 06:00:28,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 06:00:28,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 06:00:28,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 06:00:28,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 06:00:28,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 06:00:28,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 06:00:28,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-24 06:00:28,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:00:28,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:00:28,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:00:28,789 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 06:00:28,804 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:00:28,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:00:28,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:00:28,806 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:00:28,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:00:28,806 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:00:28,806 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:00:28,806 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:00:28,806 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:00:28,807 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:00:28,807 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:00:28,807 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:00:28,807 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:00:28,807 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:00:28,808 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:00:28,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:00:28,809 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:00:28,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:00:28,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:00:28,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:00:28,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:00:28,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:00:28,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:00:28,810 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:00:28,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:00:28,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:00:28,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:00:28,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:00:28,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:00:28,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:00:28,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:00:28,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:00:28,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:00:28,812 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:00:28,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:00:28,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:00:28,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:00:28,813 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:00:29,087 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:00:29,104 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:00:29,108 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:00:29,110 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:00:29,110 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:00:29,111 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_clnt_1.cil-2.c [2019-11-24 06:00:29,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64dc3b274/a89499839e66456e9da90070b81b0788/FLAG7cdeff73c [2019-11-24 06:00:29,736 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:00:29,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_clnt_1.cil-2.c [2019-11-24 06:00:29,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64dc3b274/a89499839e66456e9da90070b81b0788/FLAG7cdeff73c [2019-11-24 06:00:30,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64dc3b274/a89499839e66456e9da90070b81b0788 [2019-11-24 06:00:30,041 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:00:30,043 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:00:30,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:00:30,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:00:30,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:00:30,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6be2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30, skipping insertion in model container [2019-11-24 06:00:30,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:00:30,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:00:30,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:00:30,399 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:00:30,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:00:30,581 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:00:30,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30 WrapperNode [2019-11-24 06:00:30,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:00:30,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:00:30,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:00:30,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:00:30,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:00:30,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:00:30,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:00:30,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:00:30,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (1/1) ... [2019-11-24 06:00:30,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:00:30,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:00:30,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:00:30,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:00:30,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (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 06:00:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:00:30,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:00:30,963 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-24 06:00:31,600 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2019-11-24 06:00:31,601 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2019-11-24 06:00:31,963 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:00:31,963 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 06:00:31,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:00:31 BoogieIcfgContainer [2019-11-24 06:00:31,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:00:31,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:00:31,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:00:31,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:00:31,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:00:30" (1/3) ... [2019-11-24 06:00:31,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207b28ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:00:31, skipping insertion in model container [2019-11-24 06:00:31,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:30" (2/3) ... [2019-11-24 06:00:31,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207b28ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:00:31, skipping insertion in model container [2019-11-24 06:00:31,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:00:31" (3/3) ... [2019-11-24 06:00:31,979 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_clnt_1.cil-2.c [2019-11-24 06:00:31,990 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:00:31,999 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:00:32,012 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:00:32,062 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:00:32,063 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:00:32,063 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:00:32,064 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:00:32,064 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:00:32,064 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:00:32,064 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:00:32,064 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:00:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2019-11-24 06:00:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 06:00:32,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:00:32,102 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:00:32,103 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:00:32,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:00:32,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1633560993, now seen corresponding path program 1 times [2019-11-24 06:00:32,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:00:32,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511037885] [2019-11-24 06:00:32,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:00:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:00:32,358 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 06:00:32,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511037885] [2019-11-24 06:00:32,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:00:32,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:00:32,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342727190] [2019-11-24 06:00:32,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:00:32,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:00:32,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:00:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:00:32,385 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 3 states. [2019-11-24 06:00:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:00:32,576 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2019-11-24 06:00:32,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:00:32,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 06:00:32,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:00:32,592 INFO L225 Difference]: With dead ends: 169 [2019-11-24 06:00:32,592 INFO L226 Difference]: Without dead ends: 83 [2019-11-24 06:00:32,596 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 06:00:32,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-24 06:00:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-24 06:00:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-24 06:00:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2019-11-24 06:00:32,644 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2019-11-24 06:00:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:00:32,644 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2019-11-24 06:00:32,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:00:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2019-11-24 06:00:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-24 06:00:32,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:00:32,647 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:00:32,647 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:00:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:00:32,648 INFO L82 PathProgramCache]: Analyzing trace with hash 462209818, now seen corresponding path program 1 times [2019-11-24 06:00:32,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:00:32,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919321072] [2019-11-24 06:00:32,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:00:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:00:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:00:32,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919321072] [2019-11-24 06:00:32,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:00:32,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:00:32,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156902020] [2019-11-24 06:00:32,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:00:32,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:00:32,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:00:32,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:00:32,740 INFO L87 Difference]: Start difference. First operand 83 states and 120 transitions. Second operand 3 states. [2019-11-24 06:00:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:00:32,893 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2019-11-24 06:00:32,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:00:32,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-24 06:00:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:00:32,896 INFO L225 Difference]: With dead ends: 178 [2019-11-24 06:00:32,896 INFO L226 Difference]: Without dead ends: 98 [2019-11-24 06:00:32,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 06:00:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-24 06:00:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2019-11-24 06:00:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-24 06:00:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2019-11-24 06:00:32,909 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2019-11-24 06:00:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:00:32,910 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2019-11-24 06:00:32,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:00:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2019-11-24 06:00:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-24 06:00:32,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:00:32,914 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:00:32,914 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:00:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:00:32,914 INFO L82 PathProgramCache]: Analyzing trace with hash -172743958, now seen corresponding path program 1 times [2019-11-24 06:00:32,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:00:32,915 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855689973] [2019-11-24 06:00:32,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:00:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:00:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:00:33,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855689973] [2019-11-24 06:00:33,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:00:33,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:00:33,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333221950] [2019-11-24 06:00:33,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:00:33,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:00:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:00:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:00:33,035 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. Second operand 3 states. [2019-11-24 06:00:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:00:33,197 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2019-11-24 06:00:33,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:00:33,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-24 06:00:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:00:33,200 INFO L225 Difference]: With dead ends: 206 [2019-11-24 06:00:33,200 INFO L226 Difference]: Without dead ends: 113 [2019-11-24 06:00:33,201 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 06:00:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-24 06:00:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2019-11-24 06:00:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-24 06:00:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2019-11-24 06:00:33,212 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2019-11-24 06:00:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:00:33,212 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2019-11-24 06:00:33,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:00:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2019-11-24 06:00:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-24 06:00:33,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:00:33,217 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:00:33,217 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:00:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:00:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1423467550, now seen corresponding path program 1 times [2019-11-24 06:00:33,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:00:33,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105456419] [2019-11-24 06:00:33,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:00:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:00:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:00:33,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105456419] [2019-11-24 06:00:33,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093047619] [2019-11-24 06:00:33,354 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 06:00:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:00:33,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 06:00:33,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:00:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-24 06:00:33,520 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:00:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-24 06:00:33,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:00:33,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2019-11-24 06:00:33,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623967882] [2019-11-24 06:00:33,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 06:00:33,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:00:33,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 06:00:33,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-24 06:00:33,561 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand 6 states. [2019-11-24 06:00:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:00:33,888 INFO L93 Difference]: Finished difference Result 312 states and 467 transitions. [2019-11-24 06:00:33,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 06:00:33,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2019-11-24 06:00:33,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:00:33,891 INFO L225 Difference]: With dead ends: 312 [2019-11-24 06:00:33,891 INFO L226 Difference]: Without dead ends: 203 [2019-11-24 06:00:33,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-24 06:00:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-24 06:00:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2019-11-24 06:00:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-24 06:00:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 255 transitions. [2019-11-24 06:00:33,907 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 255 transitions. Word has length 52 [2019-11-24 06:00:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:00:33,910 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 255 transitions. [2019-11-24 06:00:33,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 06:00:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 255 transitions. [2019-11-24 06:00:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-24 06:00:33,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:00:33,912 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:00:34,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:00:34,120 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:00:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:00:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1443935512, now seen corresponding path program 1 times [2019-11-24 06:00:34,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:00:34,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13815495] [2019-11-24 06:00:34,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:00:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:00:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-24 06:00:34,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13815495] [2019-11-24 06:00:34,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:00:34,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:00:34,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136491218] [2019-11-24 06:00:34,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:00:34,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:00:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:00:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:00:34,195 INFO L87 Difference]: Start difference. First operand 186 states and 255 transitions. Second operand 3 states. [2019-11-24 06:00:34,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:00:34,316 INFO L93 Difference]: Finished difference Result 390 states and 543 transitions. [2019-11-24 06:00:34,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:00:34,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2019-11-24 06:00:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:00:34,319 INFO L225 Difference]: With dead ends: 390 [2019-11-24 06:00:34,319 INFO L226 Difference]: Without dead ends: 207 [2019-11-24 06:00:34,320 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 06:00:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-11-24 06:00:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2019-11-24 06:00:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-11-24 06:00:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2019-11-24 06:00:34,342 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 67 [2019-11-24 06:00:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:00:34,342 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2019-11-24 06:00:34,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:00:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2019-11-24 06:00:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-24 06:00:34,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:00:34,345 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:00:34,345 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:00:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:00:34,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1700874131, now seen corresponding path program 1 times [2019-11-24 06:00:34,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:00:34,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901006109] [2019-11-24 06:00:34,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:00:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:00:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 06:00:34,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901006109] [2019-11-24 06:00:34,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592410287] [2019-11-24 06:00:34,497 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 06:00:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:00:34,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-24 06:00:34,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:00:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-24 06:00:34,614 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:00:34,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:00:34,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:00:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-24 06:00:34,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374215959] [2019-11-24 06:00:34,706 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2019-11-24 06:00:34,706 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:00:34,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:00:34,717 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:00:34,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:00:35,207 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-24 06:00:35,563 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2019-11-24 06:00:35,677 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2019-11-24 06:00:35,981 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 216 [2019-11-24 06:00:36,260 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 250 [2019-11-24 06:00:36,501 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2019-11-24 06:00:36,639 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2019-11-24 06:00:36,762 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2019-11-24 06:00:36,889 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2019-11-24 06:00:37,038 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2019-11-24 06:00:37,145 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2019-11-24 06:00:37,394 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 261 [2019-11-24 06:00:37,638 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 265 [2019-11-24 06:00:37,801 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-24 06:00:37,912 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-24 06:00:38,021 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-24 06:00:38,214 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2019-11-24 06:00:38,355 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2019-11-24 06:00:38,486 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2019-11-24 06:00:38,864 WARN L192 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 281 [2019-11-24 06:00:39,227 WARN L192 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 281 [2019-11-24 06:00:39,413 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-11-24 06:00:39,563 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-11-24 06:00:39,668 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-11-24 06:00:39,865 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:39,999 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:40,139 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:40,447 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-11-24 06:00:40,763 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-11-24 06:00:41,515 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:41,652 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:41,772 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:41,895 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:42,024 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:42,159 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:42,277 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:42,395 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:42,512 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-24 06:00:42,690 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 264 [2019-11-24 06:00:42,879 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 264 [2019-11-24 06:00:43,015 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2019-11-24 06:00:43,190 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 264 [2019-11-24 06:00:43,368 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 264 [2019-11-24 06:00:43,604 WARN L192 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2019-11-24 06:00:43,822 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-24 06:00:43,952 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-24 06:00:44,078 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-24 06:00:44,211 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-24 06:00:44,349 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-24 06:00:44,474 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-24 06:00:44,629 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2019-11-24 06:00:44,773 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2019-11-24 06:00:44,933 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2019-11-24 06:00:45,087 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2019-11-24 06:00:45,232 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2019-11-24 06:00:45,376 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2019-11-24 06:00:45,616 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2019-11-24 06:00:45,750 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2019-11-24 06:00:45,887 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2019-11-24 06:00:46,022 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2019-11-24 06:00:46,157 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2019-11-24 06:00:46,292 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2019-11-24 06:00:46,875 WARN L192 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 281 [2019-11-24 06:00:47,163 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 281 [2019-11-24 06:00:47,338 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-24 06:00:47,631 WARN L192 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 281 [2019-11-24 06:00:47,920 WARN L192 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 281 [2019-11-24 06:00:48,089 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-24 06:00:48,166 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 06:00:54,757 WARN L192 SmtUtils]: Spent 6.53 s on a formula simplification. DAG size of input: 263 DAG size of output: 226 [2019-11-24 06:01:00,992 WARN L192 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 258 DAG size of output: 222 [2019-11-24 06:01:01,723 WARN L192 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 150 [2019-11-24 06:01:02,523 WARN L192 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 156 [2019-11-24 06:01:03,307 WARN L192 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 157 [2019-11-24 06:01:04,259 WARN L192 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 159 [2019-11-24 06:01:10,011 WARN L192 SmtUtils]: Spent 5.56 s on a formula simplification. DAG size of input: 253 DAG size of output: 213 [2019-11-24 06:01:15,666 WARN L192 SmtUtils]: Spent 5.50 s on a formula simplification. DAG size of input: 254 DAG size of output: 214 [2019-11-24 06:01:23,546 WARN L192 SmtUtils]: Spent 7.71 s on a formula simplification. DAG size of input: 260 DAG size of output: 210 [2019-11-24 06:01:25,203 WARN L192 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 166 [2019-11-24 06:01:26,143 WARN L192 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 169 [2019-11-24 06:01:33,665 WARN L192 SmtUtils]: Spent 6.59 s on a formula simplification. DAG size of input: 272 DAG size of output: 204 [2019-11-24 06:01:35,361 WARN L192 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 275 DAG size of output: 172 [2019-11-24 06:01:37,009 WARN L192 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 277 DAG size of output: 176 [2019-11-24 06:01:42,543 WARN L192 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 276 DAG size of output: 194 [2019-11-24 06:01:44,691 WARN L192 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 279 DAG size of output: 173 [2019-11-24 06:01:46,734 WARN L192 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 277 DAG size of output: 177 [2019-11-24 06:01:53,896 WARN L192 SmtUtils]: Spent 5.69 s on a formula simplification. DAG size of input: 280 DAG size of output: 190 [2019-11-24 06:01:55,807 WARN L192 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 283 DAG size of output: 176 [2019-11-24 06:01:57,691 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 281 DAG size of output: 178 [2019-11-24 06:01:58,974 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 225 DAG size of output: 174