/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/product-lines/minepump_spec2_product61.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:24:23,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:24:23,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:24:23,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:24:23,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:24:23,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:24:23,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:24:23,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:24:23,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:24:23,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:24:23,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:24:23,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:24:23,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:24:23,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:24:23,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:24:23,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:24:23,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:24:23,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:24:23,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:24:23,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:24:23,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:24:23,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:24:23,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:24:23,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:24:23,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:24:23,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:24:23,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:24:23,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:24:23,844 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 05:24:23,873 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:24:23,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:24:23,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:24:23,875 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:24:23,875 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:24:23,875 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:24:23,875 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:24:23,876 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:24:23,876 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:24:23,876 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:24:23,877 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:24:23,877 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:24:23,878 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:24:23,878 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:24:23,878 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:24:23,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:24:23,880 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:24:23,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:24:23,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:24:23,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:24:23,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:24:23,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:24:23,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:24:23,881 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:24:23,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:24:23,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:24:23,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:24:23,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:24:23,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:24:23,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:24:23,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:24:23,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:24:23,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:24:23,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:24:23,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:24:23,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:24:23,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:24:23,886 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:24:24,183 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:24:24,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:24:24,199 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:24:24,200 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:24:24,200 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:24:24,201 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product61.cil.c [2019-11-24 05:24:24,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d021e3e/3f0bf23ccde34ccaadac3222d947c3c2/FLAGd03f016ab [2019-11-24 05:24:24,773 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:24:24,774 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec2_product61.cil.c [2019-11-24 05:24:24,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d021e3e/3f0bf23ccde34ccaadac3222d947c3c2/FLAGd03f016ab [2019-11-24 05:24:25,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d021e3e/3f0bf23ccde34ccaadac3222d947c3c2 [2019-11-24 05:24:25,110 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:24:25,112 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:24:25,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:24:25,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:24:25,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:24:25,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:25,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c97442d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25, skipping insertion in model container [2019-11-24 05:24:25,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:25,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:24:25,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:24:25,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:24:25,666 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:24:25,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:24:25,809 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:24:25,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25 WrapperNode [2019-11-24 05:24:25,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:24:25,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:24:25,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:24:25,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:24:25,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:25,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:25,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:24:25,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:24:25,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:24:25,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:24:25,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:25,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:25,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:25,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:25,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:26,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:26,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (1/1) ... [2019-11-24 05:24:26,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:24:26,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:24:26,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:24:26,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:24:26,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (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 05:24:26,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:24:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:24:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:24:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:24:30,025 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:24:30,026 INFO L284 CfgBuilder]: Removed 350 assume(true) statements. [2019-11-24 05:24:30,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:24:30 BoogieIcfgContainer [2019-11-24 05:24:30,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:24:30,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:24:30,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:24:30,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:24:30,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:24:25" (1/3) ... [2019-11-24 05:24:30,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a12c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:24:30, skipping insertion in model container [2019-11-24 05:24:30,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:24:25" (2/3) ... [2019-11-24 05:24:30,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a12c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:24:30, skipping insertion in model container [2019-11-24 05:24:30,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:24:30" (3/3) ... [2019-11-24 05:24:30,036 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product61.cil.c [2019-11-24 05:24:30,046 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:24:30,056 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-24 05:24:30,067 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-24 05:24:30,097 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:24:30,097 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:24:30,097 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:24:30,097 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:24:30,098 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:24:30,098 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:24:30,098 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:24:30,099 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:24:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-24 05:24:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:24:30,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:24:30,127 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:24:30,128 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:24:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:24:30,134 INFO L82 PathProgramCache]: Analyzing trace with hash -899207635, now seen corresponding path program 1 times [2019-11-24 05:24:30,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:24:30,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154033465] [2019-11-24 05:24:30,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:24:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:24:30,399 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 05:24:30,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154033465] [2019-11-24 05:24:30,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:24:30,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:24:30,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703247386] [2019-11-24 05:24:30,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:24:30,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:24:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:24:30,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:24:30,421 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-24 05:24:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:24:30,442 INFO L93 Difference]: Finished difference Result 50 states and 75 transitions. [2019-11-24 05:24:30,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:24:30,443 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-24 05:24:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:24:30,454 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:24:30,455 INFO L226 Difference]: Without dead ends: 24 [2019-11-24 05:24:30,458 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:24:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-24 05:24:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-24 05:24:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-24 05:24:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-24 05:24:30,494 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 8 [2019-11-24 05:24:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:24:30,494 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-24 05:24:30,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:24:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-24 05:24:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:24:30,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:24:30,495 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:24:30,495 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:24:30,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:24:30,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1869089811, now seen corresponding path program 1 times [2019-11-24 05:24:30,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:24:30,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126330802] [2019-11-24 05:24:30,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:24:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:24:30,754 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 05:24:30,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126330802] [2019-11-24 05:24:30,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:24:30,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:24:30,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592464438] [2019-11-24 05:24:30,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:24:30,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:24:30,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:24:30,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:24:30,760 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 3 states. [2019-11-24 05:24:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:24:30,849 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2019-11-24 05:24:30,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:24:30,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:24:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:24:30,852 INFO L225 Difference]: With dead ends: 46 [2019-11-24 05:24:30,852 INFO L226 Difference]: Without dead ends: 40 [2019-11-24 05:24:30,854 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 05:24:30,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-24 05:24:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-24 05:24:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-24 05:24:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2019-11-24 05:24:30,872 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 8 [2019-11-24 05:24:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:24:30,873 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2019-11-24 05:24:30,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:24:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2019-11-24 05:24:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 05:24:30,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:24:30,875 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-24 05:24:30,875 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:24:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:24:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -377331485, now seen corresponding path program 1 times [2019-11-24 05:24:30,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:24:30,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33533389] [2019-11-24 05:24:30,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:24:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:24:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:24:31,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33533389] [2019-11-24 05:24:31,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162953456] [2019-11-24 05:24:31,121 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 05:24:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:24:31,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-24 05:24:31,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:24:31,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:24:31,717 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:24:31,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:24:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:24:31,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087156411] [2019-11-24 05:24:31,914 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:24:31,914 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:24:31,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:24:31,926 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:24:31,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:24:42,120 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 478 [2019-11-24 05:24:43,720 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-11-24 05:24:43,876 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-11-24 05:24:44,067 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 05:24:49,196 WARN L192 SmtUtils]: Spent 4.80 s on a formula simplification. DAG size of input: 486 DAG size of output: 431 [2019-11-24 05:24:54,088 WARN L192 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 490 DAG size of output: 433 [2019-11-24 05:25:00,429 WARN L192 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 592 DAG size of output: 517 [2019-11-24 05:25:06,874 WARN L192 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 603 DAG size of output: 513 [2019-11-24 05:25:06,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 05:25:06,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 7] total 19 [2019-11-24 05:25:06,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670510343] [2019-11-24 05:25:06,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:25:06,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:25:06,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:25:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2019-11-24 05:25:06,887 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 6 states. [2019-11-24 05:25:07,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:25:07,587 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2019-11-24 05:25:07,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:25:07,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-24 05:25:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:25:07,589 INFO L225 Difference]: With dead ends: 86 [2019-11-24 05:25:07,589 INFO L226 Difference]: Without dead ends: 48 [2019-11-24 05:25:07,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2019-11-24 05:25:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-24 05:25:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-11-24 05:25:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-24 05:25:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2019-11-24 05:25:07,606 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 13 [2019-11-24 05:25:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:25:07,607 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2019-11-24 05:25:07,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:25:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2019-11-24 05:25:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:25:07,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:25:07,608 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-24 05:25:07,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:25:07,815 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:25:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:25:07,815 INFO L82 PathProgramCache]: Analyzing trace with hash -245460307, now seen corresponding path program 1 times [2019-11-24 05:25:07,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:25:07,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639445488] [2019-11-24 05:25:07,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:25:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:25:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:25:07,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639445488] [2019-11-24 05:25:07,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371328904] [2019-11-24 05:25:07,985 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 05:25:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:25:08,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-24 05:25:08,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:25:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:25:08,289 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:25:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:25:08,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59199525] [2019-11-24 05:25:08,383 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:25:08,383 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:25:08,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:25:08,384 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:25:08,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:25:16,232 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 478 [2019-11-24 05:25:17,680 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-11-24 05:25:17,813 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-11-24 05:25:18,435 WARN L192 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 608 [2019-11-24 05:25:18,824 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 608 [2019-11-24 05:25:19,105 WARN L192 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 608 [2019-11-24 05:25:19,476 WARN L192 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 609 [2019-11-24 05:25:20,679 WARN L192 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 712 [2019-11-24 05:25:26,195 WARN L192 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 982 DAG size of output: 886 [2019-11-24 05:25:28,395 WARN L192 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 982 DAG size of output: 886 [2019-11-24 05:25:31,257 WARN L192 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 872 DAG size of output: 866 [2019-11-24 05:25:32,751 WARN L192 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 826 DAG size of output: 783 [2019-11-24 05:25:33,453 WARN L192 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 826 DAG size of output: 783 [2019-11-24 05:25:34,256 WARN L192 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 777 DAG size of output: 776 [2019-11-24 05:25:34,259 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 05:25:38,977 WARN L192 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 486 DAG size of output: 431