java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:42:36,760 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:42:36,763 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:42:36,776 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:42:36,777 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:42:36,778 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:42:36,779 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:42:36,781 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:42:36,783 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:42:36,784 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:42:36,784 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:42:36,785 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:42:36,785 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:42:36,786 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:42:36,787 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:42:36,790 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:42:36,792 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:42:36,795 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:42:36,796 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:42:36,798 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:42:36,800 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 14:42:36,806 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:42:36,807 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:42:36,807 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:42:36,818 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:42:36,818 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:42:36,819 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:42:36,819 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:42:36,819 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:42:36,820 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:42:36,820 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:42:36,821 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:42:36,821 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:42:36,821 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:42:36,821 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:42:36,821 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:42:36,822 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:42:36,822 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:42:36,822 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:42:36,822 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:42:36,822 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:42:36,823 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:42:36,823 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:42:36,823 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:42:36,823 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:42:36,823 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:42:36,824 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:42:36,824 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:42:36,824 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:42:36,824 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:42:36,824 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:42:36,825 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:42:36,825 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:42:36,825 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:42:36,825 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:42:36,825 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:42:36,825 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:42:36,826 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:42:36,826 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:42:36,827 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:42:36,827 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:42:36,863 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:42:36,878 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:42:36,882 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:42:36,884 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:42:36,885 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:42:36,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-01-23 14:42:37,052 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:42:37,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:42:37,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:42:37,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:42:37,065 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:42:37,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:42:37" (1/1) ... [2018-01-23 14:42:37,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6abfc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37, skipping insertion in model container [2018-01-23 14:42:37,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:42:37" (1/1) ... [2018-01-23 14:42:37,089 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:42:37,110 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:42:37,231 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:42:37,247 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:42:37,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37 WrapperNode [2018-01-23 14:42:37,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:42:37,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:42:37,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:42:37,255 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:42:37,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37" (1/1) ... [2018-01-23 14:42:37,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37" (1/1) ... [2018-01-23 14:42:37,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37" (1/1) ... [2018-01-23 14:42:37,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37" (1/1) ... [2018-01-23 14:42:37,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37" (1/1) ... [2018-01-23 14:42:37,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37" (1/1) ... [2018-01-23 14:42:37,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37" (1/1) ... [2018-01-23 14:42:37,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:42:37,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:42:37,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:42:37,285 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:42:37,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37" (1/1) ... No working directory specified, using /storage/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 [2018-01-23 14:42:37,335 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:42:37,335 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:42:37,335 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-23 14:42:37,335 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:42:37,335 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:42:37,336 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:42:37,336 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:42:37,336 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:42:37,336 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:42:37,336 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-23 14:42:37,336 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:42:37,336 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:42:37,337 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:42:37,510 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:42:37,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:42:37 BoogieIcfgContainer [2018-01-23 14:42:37,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:42:37,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:42:37,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:42:37,514 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:42:37,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:42:37" (1/3) ... [2018-01-23 14:42:37,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b1bbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:42:37, skipping insertion in model container [2018-01-23 14:42:37,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:42:37" (2/3) ... [2018-01-23 14:42:37,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b1bbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:42:37, skipping insertion in model container [2018-01-23 14:42:37,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:42:37" (3/3) ... [2018-01-23 14:42:37,517 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-01-23 14:42:37,524 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:42:37,531 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:42:37,572 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:42:37,573 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:42:37,573 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:42:37,573 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:42:37,573 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:42:37,573 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:42:37,573 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:42:37,573 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:42:37,574 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:42:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:42:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:42:37,602 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:37,603 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:42:37,603 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:42:37,609 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-23 14:42:37,612 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:37,613 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:37,661 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:37,662 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:37,662 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:42:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:42:37,720 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:42:37,727 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:42:37,733 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:42:37,733 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:42:37,733 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:42:37,733 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:42:37,733 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:42:37,733 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:42:37,733 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:42:37,734 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-23 14:42:37,734 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:42:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:42:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-23 14:42:37,736 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:37,736 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:37,736 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-23 14:42:37,737 INFO L82 PathProgramCache]: Analyzing trace with hash 352444009, now seen corresponding path program 1 times [2018-01-23 14:42:37,737 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:37,737 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:37,738 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:37,738 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:37,738 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:37,761 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:42:37,799 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:42:37,799 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:42:37,800 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:42:37,811 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:42:37,812 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:42:37,814 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-23 14:42:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:37,836 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-23 14:42:37,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:42:37,837 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-23 14:42:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:37,846 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:42:37,846 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:42:37,849 INFO L525 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 [2018-01-23 14:42:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:42:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:42:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:42:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:42:37,955 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-23 14:42:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:37,955 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:42:37,956 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:42:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:42:37,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:42:37,958 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:42:37,958 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:42:37,958 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:42:37,958 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:42:37,958 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:42:37,959 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:42:37,959 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:42:37,959 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:42:37,959 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:42:37,960 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:42:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:42:37,961 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:37,961 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:37,961 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1481761889, now seen corresponding path program 1 times [2018-01-23 14:42:37,962 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:37,962 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:37,963 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:37,963 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:37,963 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:37,971 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:42:37,983 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:42:37,983 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:42:37,984 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:42:37,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:42:37,984 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:42:37,984 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-23 14:42:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:37,989 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-23 14:42:37,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:42:37,989 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-23 14:42:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:37,991 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:42:37,991 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:42:37,992 INFO L525 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 [2018-01-23 14:42:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:42:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:42:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:42:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-23 14:42:38,002 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2018-01-23 14:42:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:38,003 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-23 14:42:38,003 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:42:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-23 14:42:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:42:38,003 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:38,004 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:38,004 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:38,004 INFO L82 PathProgramCache]: Analyzing trace with hash 499012364, now seen corresponding path program 1 times [2018-01-23 14:42:38,004 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:38,004 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:38,005 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:38,005 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:38,005 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:38,016 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:42:38,055 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:42:38,055 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:42:38,057 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:42:38,057 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:42:38,057 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:42:38,057 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2018-01-23 14:42:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:38,121 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-23 14:42:38,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:42:38,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-23 14:42:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:38,125 INFO L225 Difference]: With dead ends: 66 [2018-01-23 14:42:38,126 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:42:38,127 INFO L525 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 [2018-01-23 14:42:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:42:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-01-23 14:42:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:42:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-23 14:42:38,141 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 19 [2018-01-23 14:42:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:38,141 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-23 14:42:38,141 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:42:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-23 14:42:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:42:38,142 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:38,143 INFO L322 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, 1, 1, 1] [2018-01-23 14:42:38,143 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:38,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1504830404, now seen corresponding path program 1 times [2018-01-23 14:42:38,143 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:38,143 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:38,144 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:38,145 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:38,145 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:38,167 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:42:38,339 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:42:38,339 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:42:38,340 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:42:38,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:42:38,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:42:38,340 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2018-01-23 14:42:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:38,411 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-01-23 14:42:38,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:42:38,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2018-01-23 14:42:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:38,413 INFO L225 Difference]: With dead ends: 80 [2018-01-23 14:42:38,414 INFO L226 Difference]: Without dead ends: 46 [2018-01-23 14:42:38,414 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:42:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-23 14:42:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-01-23 14:42:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-23 14:42:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-23 14:42:38,422 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 31 [2018-01-23 14:42:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:38,422 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-23 14:42:38,422 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:42:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-23 14:42:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:42:38,424 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:38,424 INFO L322 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:38,424 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:38,425 INFO L82 PathProgramCache]: Analyzing trace with hash -151955344, now seen corresponding path program 1 times [2018-01-23 14:42:38,425 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:38,425 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:38,427 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:38,427 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:38,427 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:38,446 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:42:38,567 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:38,567 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:38,574 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:38,611 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:42:38,743 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:38,743 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-01-23 14:42:38,743 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:42:38,744 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:42:38,744 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:42:38,744 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 8 states. [2018-01-23 14:42:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:38,911 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2018-01-23 14:42:38,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:42:38,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2018-01-23 14:42:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:38,913 INFO L225 Difference]: With dead ends: 87 [2018-01-23 14:42:38,914 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:42:38,914 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:42:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:42:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2018-01-23 14:42:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-23 14:42:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2018-01-23 14:42:38,922 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 36 [2018-01-23 14:42:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:38,922 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2018-01-23 14:42:38,922 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:42:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2018-01-23 14:42:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-23 14:42:38,924 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:38,924 INFO L322 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:38,924 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:38,924 INFO L82 PathProgramCache]: Analyzing trace with hash -524554428, now seen corresponding path program 2 times [2018-01-23 14:42:38,924 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:38,925 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:38,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:38,926 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:38,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:38,944 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:42:39,094 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:39,095 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:39,109 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:42:39,123 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:39,130 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:39,131 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:39,134 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:42:39,198 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:39,198 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-01-23 14:42:39,199 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:42:39,199 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:42:39,199 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:42:39,200 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 10 states. [2018-01-23 14:42:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:39,358 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2018-01-23 14:42:39,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:42:39,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2018-01-23 14:42:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:39,360 INFO L225 Difference]: With dead ends: 97 [2018-01-23 14:42:39,360 INFO L226 Difference]: Without dead ends: 56 [2018-01-23 14:42:39,361 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:42:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-23 14:42:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2018-01-23 14:42:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-23 14:42:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-01-23 14:42:39,367 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 41 [2018-01-23 14:42:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:39,367 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-01-23 14:42:39,368 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:42:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-01-23 14:42:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-23 14:42:39,369 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:39,369 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1] [2018-01-23 14:42:39,369 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:39,370 INFO L82 PathProgramCache]: Analyzing trace with hash -438141712, now seen corresponding path program 3 times [2018-01-23 14:42:39,370 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:39,370 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:39,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:39,371 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:39,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:39,386 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:42:39,543 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:39,543 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:39,548 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:42:39,556 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:39,560 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:39,561 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:39,563 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-01-23 14:42:39,597 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:39,597 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2018-01-23 14:42:39,597 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-23 14:42:39,598 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-23 14:42:39,598 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:42:39,598 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 9 states. [2018-01-23 14:42:39,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:39,696 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2018-01-23 14:42:39,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:42:39,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2018-01-23 14:42:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:39,698 INFO L225 Difference]: With dead ends: 131 [2018-01-23 14:42:39,698 INFO L226 Difference]: Without dead ends: 85 [2018-01-23 14:42:39,699 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:42:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-23 14:42:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2018-01-23 14:42:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-23 14:42:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2018-01-23 14:42:39,708 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 46 [2018-01-23 14:42:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:39,708 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2018-01-23 14:42:39,708 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-23 14:42:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2018-01-23 14:42:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-23 14:42:39,712 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:39,712 INFO L322 BasicCegarLoop]: trace histogram [10, 8, 8, 8, 8, 3, 2, 2, 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] [2018-01-23 14:42:39,712 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash 515188947, now seen corresponding path program 4 times [2018-01-23 14:42:39,713 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:39,713 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:39,714 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:39,714 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:39,714 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:39,735 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 5 proven. 139 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-01-23 14:42:39,941 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:39,956 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:39,961 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:42:39,985 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:39,989 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-01-23 14:42:40,075 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:40,076 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-01-23 14:42:40,076 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:42:40,076 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:42:40,076 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:42:40,077 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 14 states. [2018-01-23 14:42:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:40,321 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2018-01-23 14:42:40,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:42:40,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2018-01-23 14:42:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:40,323 INFO L225 Difference]: With dead ends: 134 [2018-01-23 14:42:40,323 INFO L226 Difference]: Without dead ends: 75 [2018-01-23 14:42:40,324 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:42:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-23 14:42:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2018-01-23 14:42:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-23 14:42:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2018-01-23 14:42:40,332 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 82 [2018-01-23 14:42:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:40,332 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2018-01-23 14:42:40,332 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:42:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2018-01-23 14:42:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-01-23 14:42:40,334 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:40,334 INFO L322 BasicCegarLoop]: trace histogram [12, 10, 10, 10, 10, 3, 2, 2, 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] [2018-01-23 14:42:40,334 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash -611097235, now seen corresponding path program 5 times [2018-01-23 14:42:40,335 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:40,335 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:40,336 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:40,336 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:40,336 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:40,355 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:40,613 WARN L146 SmtUtils]: Spent 104ms on a formula simplification. DAG size of input: 13 DAG size of output 12 [2018-01-23 14:42:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 5 proven. 210 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-01-23 14:42:40,985 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:40,985 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:40,998 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:42:41,008 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:41,015 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:41,018 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:41,020 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:41,023 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:41,028 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:41,029 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:41,033 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 156 proven. 60 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-01-23 14:42:41,132 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:41,133 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-01-23 14:42:41,133 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:42:41,133 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:42:41,133 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:42:41,133 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 16 states. [2018-01-23 14:42:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:41,322 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2018-01-23 14:42:41,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:42:41,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2018-01-23 14:42:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:41,323 INFO L225 Difference]: With dead ends: 144 [2018-01-23 14:42:41,324 INFO L226 Difference]: Without dead ends: 80 [2018-01-23 14:42:41,325 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:42:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-23 14:42:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2018-01-23 14:42:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-23 14:42:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2018-01-23 14:42:41,332 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 92 [2018-01-23 14:42:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:41,333 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2018-01-23 14:42:41,333 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:42:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2018-01-23 14:42:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-01-23 14:42:41,336 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:41,336 INFO L322 BasicCegarLoop]: trace histogram [14, 12, 12, 12, 12, 3, 2, 2, 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] [2018-01-23 14:42:41,336 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash -556985837, now seen corresponding path program 6 times [2018-01-23 14:42:41,336 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:41,337 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:41,337 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:41,338 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:41,338 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:41,360 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 5 proven. 296 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-01-23 14:42:41,621 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:41,621 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:41,627 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:42:41,640 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:41,645 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:41,653 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:41,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:41,663 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:41,664 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:41,670 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2018-01-23 14:42:41,769 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:41,769 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2018-01-23 14:42:41,770 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-23 14:42:41,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-23 14:42:41,770 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:42:41,771 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 13 states. [2018-01-23 14:42:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:41,892 INFO L93 Difference]: Finished difference Result 183 states and 202 transitions. [2018-01-23 14:42:41,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:42:41,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 102 [2018-01-23 14:42:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:41,893 INFO L225 Difference]: With dead ends: 183 [2018-01-23 14:42:41,893 INFO L226 Difference]: Without dead ends: 114 [2018-01-23 14:42:41,894 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:42:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-23 14:42:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 91. [2018-01-23 14:42:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-23 14:42:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2018-01-23 14:42:41,901 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 102 [2018-01-23 14:42:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:41,902 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2018-01-23 14:42:41,902 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-23 14:42:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2018-01-23 14:42:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-01-23 14:42:41,903 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:41,903 INFO L322 BasicCegarLoop]: trace histogram [24, 21, 21, 21, 21, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:41,903 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:41,903 INFO L82 PathProgramCache]: Analyzing trace with hash 294495146, now seen corresponding path program 7 times [2018-01-23 14:42:41,904 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:41,904 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:41,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:41,904 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:41,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:41,930 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 8 proven. 675 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-01-23 14:42:42,256 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:42,256 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:42,262 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:42,312 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 566 proven. 119 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2018-01-23 14:42:42,532 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:42,533 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-01-23 14:42:42,533 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:42:42,533 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:42:42,533 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:42:42,534 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 20 states. [2018-01-23 14:42:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:42,789 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2018-01-23 14:42:42,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:42:42,791 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 158 [2018-01-23 14:42:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:42,793 INFO L225 Difference]: With dead ends: 182 [2018-01-23 14:42:42,793 INFO L226 Difference]: Without dead ends: 99 [2018-01-23 14:42:42,794 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:42:42,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-23 14:42:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2018-01-23 14:42:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-23 14:42:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2018-01-23 14:42:42,803 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 158 [2018-01-23 14:42:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:42,804 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2018-01-23 14:42:42,804 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:42:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2018-01-23 14:42:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-01-23 14:42:42,806 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:42,807 INFO L322 BasicCegarLoop]: trace histogram [27, 24, 24, 24, 24, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:42,807 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:42,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1051815268, now seen corresponding path program 8 times [2018-01-23 14:42:42,807 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:42,807 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:42,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:42,809 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:42,809 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:42,836 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 8 proven. 870 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-01-23 14:42:43,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:43,100 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:43,105 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:42:43,118 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:43,135 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:43,139 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:43,142 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 724 proven. 156 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2018-01-23 14:42:43,299 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:43,299 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-01-23 14:42:43,300 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:42:43,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:42:43,300 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:42:43,300 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 22 states. [2018-01-23 14:42:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:43,539 INFO L93 Difference]: Finished difference Result 192 states and 208 transitions. [2018-01-23 14:42:43,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:42:43,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 173 [2018-01-23 14:42:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:43,540 INFO L225 Difference]: With dead ends: 192 [2018-01-23 14:42:43,540 INFO L226 Difference]: Without dead ends: 104 [2018-01-23 14:42:43,541 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:42:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-01-23 14:42:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2018-01-23 14:42:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-01-23 14:42:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2018-01-23 14:42:43,550 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 173 [2018-01-23 14:42:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:43,550 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2018-01-23 14:42:43,551 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:42:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2018-01-23 14:42:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-01-23 14:42:43,553 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:43,553 INFO L322 BasicCegarLoop]: trace histogram [30, 27, 27, 27, 27, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:43,553 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:43,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1142155370, now seen corresponding path program 9 times [2018-01-23 14:42:43,554 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:43,554 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:43,555 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:43,555 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:43,555 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:43,579 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 8 proven. 1090 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2018-01-23 14:42:43,925 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:43,925 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:43,930 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:42:43,944 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:43,947 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:43,950 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:43,954 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:43,955 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:43,958 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1935 trivial. 0 not checked. [2018-01-23 14:42:44,024 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:44,024 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2018-01-23 14:42:44,025 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-23 14:42:44,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-23 14:42:44,025 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:42:44,025 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 17 states. [2018-01-23 14:42:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:44,162 INFO L93 Difference]: Finished difference Result 236 states and 260 transitions. [2018-01-23 14:42:44,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:42:44,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 188 [2018-01-23 14:42:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:44,164 INFO L225 Difference]: With dead ends: 236 [2018-01-23 14:42:44,164 INFO L226 Difference]: Without dead ends: 143 [2018-01-23 14:42:44,165 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:42:44,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-23 14:42:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2018-01-23 14:42:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-23 14:42:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2018-01-23 14:42:44,174 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 188 [2018-01-23 14:42:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:44,175 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2018-01-23 14:42:44,175 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-23 14:42:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2018-01-23 14:42:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-01-23 14:42:44,179 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:44,179 INFO L322 BasicCegarLoop]: trace histogram [44, 40, 40, 40, 40, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:44,179 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash 132824627, now seen corresponding path program 10 times [2018-01-23 14:42:44,180 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:44,180 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:44,181 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:44,181 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:44,181 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:44,213 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 11 proven. 1880 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2018-01-23 14:42:44,725 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:44,725 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:44,731 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:42:44,788 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:44,794 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 1649 proven. 245 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2018-01-23 14:42:45,038 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:45,038 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-01-23 14:42:45,038 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-23 14:42:45,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-23 14:42:45,039 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:42:45,039 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 26 states. [2018-01-23 14:42:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:45,420 INFO L93 Difference]: Finished difference Result 230 states and 251 transitions. [2018-01-23 14:42:45,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:42:45,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 264 [2018-01-23 14:42:45,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:45,422 INFO L225 Difference]: With dead ends: 230 [2018-01-23 14:42:45,422 INFO L226 Difference]: Without dead ends: 123 [2018-01-23 14:42:45,423 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1021, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:42:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-23 14:42:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2018-01-23 14:42:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-23 14:42:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2018-01-23 14:42:45,431 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 264 [2018-01-23 14:42:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:45,432 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2018-01-23 14:42:45,432 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-23 14:42:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2018-01-23 14:42:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-01-23 14:42:45,433 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:45,433 INFO L322 BasicCegarLoop]: trace histogram [48, 44, 44, 44, 44, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:45,433 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:45,433 INFO L82 PathProgramCache]: Analyzing trace with hash -171303065, now seen corresponding path program 11 times [2018-01-23 14:42:45,434 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:45,434 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:45,434 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:45,434 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:45,434 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:45,458 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:45,940 WARN L146 SmtUtils]: Spent 102ms on a formula simplification. DAG size of input: 13 DAG size of output 12 [2018-01-23 14:42:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5156 backedges. 11 proven. 2259 refuted. 0 times theorem prover too weak. 2886 trivial. 0 not checked. [2018-01-23 14:42:46,227 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:46,227 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:46,233 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:42:46,252 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,254 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,256 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,260 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,263 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,267 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,271 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,275 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,280 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,286 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,302 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,313 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:46,314 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:46,320 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5156 backedges. 1976 proven. 297 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2018-01-23 14:42:46,576 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:46,576 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-23 14:42:46,577 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:42:46,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:42:46,577 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:42:46,577 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 28 states. [2018-01-23 14:42:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:46,942 INFO L93 Difference]: Finished difference Result 240 states and 261 transitions. [2018-01-23 14:42:46,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:42:46,942 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 284 [2018-01-23 14:42:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:46,943 INFO L225 Difference]: With dead ends: 240 [2018-01-23 14:42:46,943 INFO L226 Difference]: Without dead ends: 128 [2018-01-23 14:42:46,944 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=449, Invalid=1191, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:42:46,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-01-23 14:42:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2018-01-23 14:42:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-01-23 14:42:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2018-01-23 14:42:46,951 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 284 [2018-01-23 14:42:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:46,951 INFO L432 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2018-01-23 14:42:46,952 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:42:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2018-01-23 14:42:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-01-23 14:42:46,954 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:46,954 INFO L322 BasicCegarLoop]: trace histogram [52, 48, 48, 48, 48, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:46,954 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:46,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2029948749, now seen corresponding path program 12 times [2018-01-23 14:42:46,954 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:46,955 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:46,955 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:46,956 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:46,956 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:46,988 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6098 backedges. 11 proven. 2673 refuted. 0 times theorem prover too weak. 3414 trivial. 0 not checked. [2018-01-23 14:42:47,588 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:47,589 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:47,593 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:42:47,612 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:47,614 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:47,617 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:47,619 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:47,623 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:47,626 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:47,633 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:47,638 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:47,644 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:47,645 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:47,651 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6098 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 6060 trivial. 0 not checked. [2018-01-23 14:42:47,775 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:47,775 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2018-01-23 14:42:47,776 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-23 14:42:47,776 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-23 14:42:47,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:42:47,776 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand 21 states. [2018-01-23 14:42:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:47,963 INFO L93 Difference]: Finished difference Result 289 states and 318 transitions. [2018-01-23 14:42:47,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:42:47,963 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 304 [2018-01-23 14:42:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:47,964 INFO L225 Difference]: With dead ends: 289 [2018-01-23 14:42:47,965 INFO L226 Difference]: Without dead ends: 172 [2018-01-23 14:42:47,966 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:42:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-01-23 14:42:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 139. [2018-01-23 14:42:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-01-23 14:42:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2018-01-23 14:42:47,976 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 304 [2018-01-23 14:42:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:47,976 INFO L432 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2018-01-23 14:42:47,976 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-23 14:42:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2018-01-23 14:42:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-01-23 14:42:47,979 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:47,980 INFO L322 BasicCegarLoop]: trace histogram [70, 65, 65, 65, 65, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:47,980 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:47,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1350287972, now seen corresponding path program 13 times [2018-01-23 14:42:47,980 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:47,980 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:47,981 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:47,981 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:47,981 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:48,021 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11170 backedges. 14 proven. 4024 refuted. 0 times theorem prover too weak. 7132 trivial. 0 not checked. [2018-01-23 14:42:48,690 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:48,690 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:48,695 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:48,779 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11170 backedges. 3626 proven. 416 refuted. 0 times theorem prover too weak. 7128 trivial. 0 not checked. [2018-01-23 14:42:49,116 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:49,116 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-01-23 14:42:49,117 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-23 14:42:49,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-23 14:42:49,117 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:42:49,118 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 32 states. [2018-01-23 14:42:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:49,526 INFO L93 Difference]: Finished difference Result 278 states and 304 transitions. [2018-01-23 14:42:49,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:42:49,527 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 400 [2018-01-23 14:42:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:49,528 INFO L225 Difference]: With dead ends: 278 [2018-01-23 14:42:49,529 INFO L226 Difference]: Without dead ends: 147 [2018-01-23 14:42:49,530 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=592, Invalid=1570, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:42:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-01-23 14:42:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2018-01-23 14:42:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-01-23 14:42:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 155 transitions. [2018-01-23 14:42:49,539 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 155 transitions. Word has length 400 [2018-01-23 14:42:49,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:49,540 INFO L432 AbstractCegarLoop]: Abstraction has 144 states and 155 transitions. [2018-01-23 14:42:49,540 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-23 14:42:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 155 transitions. [2018-01-23 14:42:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-01-23 14:42:49,543 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:49,544 INFO L322 BasicCegarLoop]: trace histogram [75, 70, 70, 70, 70, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:49,544 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1570210812, now seen corresponding path program 14 times [2018-01-23 14:42:49,544 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:49,544 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:49,545 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:49,545 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:49,545 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:49,584 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12895 backedges. 14 proven. 4647 refuted. 0 times theorem prover too weak. 8234 trivial. 0 not checked. [2018-01-23 14:42:50,511 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:50,511 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:50,517 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:42:50,547 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:50,601 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:50,617 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:50,624 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12895 backedges. 4182 proven. 483 refuted. 0 times theorem prover too weak. 8230 trivial. 0 not checked. [2018-01-23 14:42:51,717 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:51,717 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-01-23 14:42:51,718 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:42:51,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:42:51,718 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:42:51,718 INFO L87 Difference]: Start difference. First operand 144 states and 155 transitions. Second operand 34 states. [2018-01-23 14:42:52,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:52,209 INFO L93 Difference]: Finished difference Result 288 states and 314 transitions. [2018-01-23 14:42:52,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-23 14:42:52,209 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 425 [2018-01-23 14:42:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:52,211 INFO L225 Difference]: With dead ends: 288 [2018-01-23 14:42:52,211 INFO L226 Difference]: Without dead ends: 152 [2018-01-23 14:42:52,213 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=671, Invalid=1779, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:42:52,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-01-23 14:42:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2018-01-23 14:42:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-01-23 14:42:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2018-01-23 14:42:52,222 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 425 [2018-01-23 14:42:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:52,223 INFO L432 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2018-01-23 14:42:52,223 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:42:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2018-01-23 14:42:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-01-23 14:42:52,226 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:52,226 INFO L322 BasicCegarLoop]: trace histogram [80, 75, 75, 75, 75, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:52,227 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash -877517212, now seen corresponding path program 15 times [2018-01-23 14:42:52,227 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:52,227 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:52,228 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:52,228 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:52,228 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:52,265 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14745 backedges. 14 proven. 5315 refuted. 0 times theorem prover too weak. 9416 trivial. 0 not checked. [2018-01-23 14:42:53,714 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:53,715 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:53,724 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:42:53,759 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,764 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,769 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,775 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,783 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,791 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,798 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,806 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,817 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,829 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,839 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,848 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,857 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,867 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,878 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,895 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,907 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:53,909 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:53,918 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14745 backedges. 4778 proven. 555 refuted. 0 times theorem prover too weak. 9412 trivial. 0 not checked. [2018-01-23 14:42:54,498 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:54,498 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-01-23 14:42:54,499 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:42:54,499 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:42:54,499 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:42:54,500 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand 36 states. [2018-01-23 14:42:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:55,767 INFO L93 Difference]: Finished difference Result 298 states and 324 transitions. [2018-01-23 14:42:55,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-23 14:42:55,768 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 450 [2018-01-23 14:42:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:55,769 INFO L225 Difference]: With dead ends: 298 [2018-01-23 14:42:55,769 INFO L226 Difference]: Without dead ends: 157 [2018-01-23 14:42:55,771 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=755, Invalid=2001, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:42:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-01-23 14:42:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2018-01-23 14:42:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-01-23 14:42:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 165 transitions. [2018-01-23 14:42:55,780 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 165 transitions. Word has length 450 [2018-01-23 14:42:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:55,780 INFO L432 AbstractCegarLoop]: Abstraction has 154 states and 165 transitions. [2018-01-23 14:42:55,780 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:42:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 165 transitions. [2018-01-23 14:42:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-01-23 14:42:55,783 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:55,783 INFO L322 BasicCegarLoop]: trace histogram [85, 80, 80, 80, 80, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:55,783 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash 982430980, now seen corresponding path program 16 times [2018-01-23 14:42:55,784 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:55,784 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:55,784 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:55,785 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:55,785 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:55,823 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16720 backedges. 14 proven. 6028 refuted. 0 times theorem prover too weak. 10678 trivial. 0 not checked. [2018-01-23 14:42:56,889 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:56,889 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:56,895 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:42:57,014 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:57,023 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16720 backedges. 5414 proven. 632 refuted. 0 times theorem prover too weak. 10674 trivial. 0 not checked. [2018-01-23 14:42:57,613 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:57,613 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2018-01-23 14:42:57,614 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:42:57,614 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:42:57,614 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:42:57,614 INFO L87 Difference]: Start difference. First operand 154 states and 165 transitions. Second operand 38 states. [2018-01-23 14:42:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:58,133 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2018-01-23 14:42:58,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:42:58,134 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 475 [2018-01-23 14:42:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:58,135 INFO L225 Difference]: With dead ends: 308 [2018-01-23 14:42:58,135 INFO L226 Difference]: Without dead ends: 162 [2018-01-23 14:42:58,136 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=844, Invalid=2236, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:42:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-01-23 14:42:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2018-01-23 14:42:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-01-23 14:42:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2018-01-23 14:42:58,144 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 475 [2018-01-23 14:42:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:58,145 INFO L432 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2018-01-23 14:42:58,145 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:42:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2018-01-23 14:42:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-01-23 14:42:58,147 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:58,147 INFO L322 BasicCegarLoop]: trace histogram [90, 85, 85, 85, 85, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:58,147 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:58,147 INFO L82 PathProgramCache]: Analyzing trace with hash -444773788, now seen corresponding path program 17 times [2018-01-23 14:42:58,147 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:58,148 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:58,148 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:58,148 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:58,148 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:58,177 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18820 backedges. 14 proven. 6786 refuted. 0 times theorem prover too weak. 12020 trivial. 0 not checked. [2018-01-23 14:42:59,441 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:59,441 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:59,446 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:42:59,468 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,471 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,472 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,473 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,474 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,476 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,486 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,488 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,490 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,492 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,494 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,499 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,502 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,506 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,509 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,512 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,516 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,519 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,523 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,528 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,535 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,548 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,556 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,565 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,575 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,585 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,596 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,608 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,622 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,636 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,654 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,672 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,692 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,715 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:59,717 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:59,724 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18820 backedges. 10662 proven. 714 refuted. 0 times theorem prover too weak. 7444 trivial. 0 not checked. [2018-01-23 14:43:00,187 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:00,188 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-01-23 14:43:00,188 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:43:00,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:43:00,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:43:00,189 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand 40 states. [2018-01-23 14:43:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:00,790 INFO L93 Difference]: Finished difference Result 318 states and 344 transitions. [2018-01-23 14:43:00,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:43:00,790 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 500 [2018-01-23 14:43:00,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:00,792 INFO L225 Difference]: With dead ends: 318 [2018-01-23 14:43:00,793 INFO L226 Difference]: Without dead ends: 167 [2018-01-23 14:43:00,795 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=938, Invalid=2484, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:43:00,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-01-23 14:43:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2018-01-23 14:43:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-01-23 14:43:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 175 transitions. [2018-01-23 14:43:00,804 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 175 transitions. Word has length 500 [2018-01-23 14:43:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:00,804 INFO L432 AbstractCegarLoop]: Abstraction has 164 states and 175 transitions. [2018-01-23 14:43:00,804 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:43:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 175 transitions. [2018-01-23 14:43:00,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2018-01-23 14:43:00,808 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:00,809 INFO L322 BasicCegarLoop]: trace histogram [95, 90, 90, 90, 90, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:00,809 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:00,809 INFO L82 PathProgramCache]: Analyzing trace with hash 359181828, now seen corresponding path program 18 times [2018-01-23 14:43:00,809 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:00,809 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:00,810 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:00,810 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:00,810 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:00,851 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21045 backedges. 14 proven. 7589 refuted. 0 times theorem prover too weak. 13442 trivial. 0 not checked. [2018-01-23 14:43:02,103 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:02,104 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:02,109 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:02,133 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,135 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,137 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,139 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,142 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,144 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,148 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,151 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,156 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,160 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,164 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,169 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,174 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,178 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,183 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,188 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,196 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,203 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,209 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,217 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,227 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,233 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,244 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,252 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,263 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,275 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:02,277 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:02,284 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21045 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 20985 trivial. 0 not checked. [2018-01-23 14:43:02,489 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:02,489 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2018-01-23 14:43:02,489 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:43:02,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:43:02,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:43:02,490 INFO L87 Difference]: Start difference. First operand 164 states and 175 transitions. Second operand 28 states. [2018-01-23 14:43:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:02,781 INFO L93 Difference]: Finished difference Result 372 states and 406 transitions. [2018-01-23 14:43:02,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:43:02,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 525 [2018-01-23 14:43:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:02,783 INFO L225 Difference]: With dead ends: 372 [2018-01-23 14:43:02,783 INFO L226 Difference]: Without dead ends: 216 [2018-01-23 14:43:02,784 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:43:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-01-23 14:43:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 178. [2018-01-23 14:43:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-01-23 14:43:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 191 transitions. [2018-01-23 14:43:02,792 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 191 transitions. Word has length 525 [2018-01-23 14:43:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:02,792 INFO L432 AbstractCegarLoop]: Abstraction has 178 states and 191 transitions. [2018-01-23 14:43:02,792 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:43:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 191 transitions. [2018-01-23 14:43:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2018-01-23 14:43:02,795 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:02,796 INFO L322 BasicCegarLoop]: trace histogram [120, 114, 114, 114, 114, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:02,796 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash 440436513, now seen corresponding path program 19 times [2018-01-23 14:43:02,796 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:02,796 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:02,797 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:02,797 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:02,797 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:02,841 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 33750 backedges. 17 proven. 10323 refuted. 0 times theorem prover too weak. 23410 trivial. 0 not checked. [2018-01-23 14:43:04,395 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:04,395 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:04,401 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:04,524 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 33750 backedges. 9452 proven. 893 refuted. 0 times theorem prover too weak. 23405 trivial. 0 not checked. [2018-01-23 14:43:05,142 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:05,143 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2018-01-23 14:43:05,143 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-23 14:43:05,143 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-23 14:43:05,144 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:43:05,144 INFO L87 Difference]: Start difference. First operand 178 states and 191 transitions. Second operand 44 states. [2018-01-23 14:43:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:05,767 INFO L93 Difference]: Finished difference Result 356 states and 387 transitions. [2018-01-23 14:43:05,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:43:05,788 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 656 [2018-01-23 14:43:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:05,790 INFO L225 Difference]: With dead ends: 356 [2018-01-23 14:43:05,790 INFO L226 Difference]: Without dead ends: 186 [2018-01-23 14:43:05,792 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1141, Invalid=3019, Unknown=0, NotChecked=0, Total=4160 [2018-01-23 14:43:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-01-23 14:43:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2018-01-23 14:43:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-01-23 14:43:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 196 transitions. [2018-01-23 14:43:05,804 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 196 transitions. Word has length 656 [2018-01-23 14:43:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:05,804 INFO L432 AbstractCegarLoop]: Abstraction has 183 states and 196 transitions. [2018-01-23 14:43:05,804 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-23 14:43:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 196 transitions. [2018-01-23 14:43:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2018-01-23 14:43:05,810 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:05,811 INFO L322 BasicCegarLoop]: trace histogram [126, 120, 120, 120, 120, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:05,811 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:05,811 INFO L82 PathProgramCache]: Analyzing trace with hash 138230419, now seen corresponding path program 20 times [2018-01-23 14:43:05,811 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:05,812 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:05,812 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:05,812 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:05,813 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:05,866 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 37317 backedges. 17 proven. 11415 refuted. 0 times theorem prover too weak. 25885 trivial. 0 not checked. [2018-01-23 14:43:07,449 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:07,449 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:07,455 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:07,486 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:07,543 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:07,554 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:07,563 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 37317 backedges. 10447 proven. 990 refuted. 0 times theorem prover too weak. 25880 trivial. 0 not checked. [2018-01-23 14:43:08,261 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:08,261 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-01-23 14:43:08,261 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-23 14:43:08,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-23 14:43:08,262 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:43:08,262 INFO L87 Difference]: Start difference. First operand 183 states and 196 transitions. Second operand 46 states. [2018-01-23 14:43:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:08,896 INFO L93 Difference]: Finished difference Result 366 states and 397 transitions. [2018-01-23 14:43:08,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:43:08,896 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 686 [2018-01-23 14:43:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:08,897 INFO L225 Difference]: With dead ends: 366 [2018-01-23 14:43:08,897 INFO L226 Difference]: Without dead ends: 191 [2018-01-23 14:43:08,899 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1250, Invalid=3306, Unknown=0, NotChecked=0, Total=4556 [2018-01-23 14:43:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-01-23 14:43:08,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2018-01-23 14:43:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-01-23 14:43:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 201 transitions. [2018-01-23 14:43:08,908 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 201 transitions. Word has length 686 [2018-01-23 14:43:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:08,908 INFO L432 AbstractCegarLoop]: Abstraction has 188 states and 201 transitions. [2018-01-23 14:43:08,908 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-23 14:43:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 201 transitions. [2018-01-23 14:43:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2018-01-23 14:43:08,914 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:08,915 INFO L322 BasicCegarLoop]: trace histogram [132, 126, 126, 126, 126, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:08,915 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash 29517409, now seen corresponding path program 21 times [2018-01-23 14:43:08,915 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:08,915 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:08,916 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:08,916 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:08,916 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:08,972 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 41064 backedges. 17 proven. 12562 refuted. 0 times theorem prover too weak. 28485 trivial. 0 not checked. [2018-01-23 14:43:10,403 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:10,403 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:10,408 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:10,440 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,443 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,447 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,452 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,459 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,464 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,470 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,476 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,482 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,491 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,499 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,507 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,516 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,528 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,538 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,549 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,565 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,581 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,609 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,631 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,657 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,682 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,706 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:10,709 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:10,719 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 41064 backedges. 11492 proven. 1092 refuted. 0 times theorem prover too weak. 28480 trivial. 0 not checked. [2018-01-23 14:43:11,457 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:11,468 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2018-01-23 14:43:11,469 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:43:11,469 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:43:11,469 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:43:11,469 INFO L87 Difference]: Start difference. First operand 188 states and 201 transitions. Second operand 48 states. [2018-01-23 14:43:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:12,150 INFO L93 Difference]: Finished difference Result 376 states and 407 transitions. [2018-01-23 14:43:12,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:43:12,150 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 716 [2018-01-23 14:43:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:12,152 INFO L225 Difference]: With dead ends: 376 [2018-01-23 14:43:12,152 INFO L226 Difference]: Without dead ends: 196 [2018-01-23 14:43:12,154 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1364, Invalid=3606, Unknown=0, NotChecked=0, Total=4970 [2018-01-23 14:43:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-01-23 14:43:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2018-01-23 14:43:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-01-23 14:43:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 206 transitions. [2018-01-23 14:43:12,163 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 206 transitions. Word has length 716 [2018-01-23 14:43:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:12,163 INFO L432 AbstractCegarLoop]: Abstraction has 193 states and 206 transitions. [2018-01-23 14:43:12,163 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:43:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 206 transitions. [2018-01-23 14:43:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2018-01-23 14:43:12,167 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:12,167 INFO L322 BasicCegarLoop]: trace histogram [138, 132, 132, 132, 132, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:12,167 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1172108883, now seen corresponding path program 22 times [2018-01-23 14:43:12,167 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:12,168 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:12,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:12,168 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:12,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:12,204 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 44991 backedges. 17 proven. 13764 refuted. 0 times theorem prover too weak. 31210 trivial. 0 not checked. [2018-01-23 14:43:13,809 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:13,809 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:13,814 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:14,019 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:14,029 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 44991 backedges. 12587 proven. 1199 refuted. 0 times theorem prover too weak. 31205 trivial. 0 not checked. [2018-01-23 14:43:14,867 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:14,867 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2018-01-23 14:43:14,868 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-23 14:43:14,868 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-23 14:43:14,869 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=1846, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:43:14,869 INFO L87 Difference]: Start difference. First operand 193 states and 206 transitions. Second operand 50 states. [2018-01-23 14:43:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:15,590 INFO L93 Difference]: Finished difference Result 386 states and 417 transitions. [2018-01-23 14:43:15,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-23 14:43:15,590 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 746 [2018-01-23 14:43:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:15,592 INFO L225 Difference]: With dead ends: 386 [2018-01-23 14:43:15,592 INFO L226 Difference]: Without dead ends: 201 [2018-01-23 14:43:15,594 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1483, Invalid=3919, Unknown=0, NotChecked=0, Total=5402 [2018-01-23 14:43:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-01-23 14:43:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2018-01-23 14:43:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-01-23 14:43:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 211 transitions. [2018-01-23 14:43:15,603 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 211 transitions. Word has length 746 [2018-01-23 14:43:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:15,604 INFO L432 AbstractCegarLoop]: Abstraction has 198 states and 211 transitions. [2018-01-23 14:43:15,604 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-23 14:43:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 211 transitions. [2018-01-23 14:43:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2018-01-23 14:43:15,611 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:15,611 INFO L322 BasicCegarLoop]: trace histogram [144, 138, 138, 138, 138, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:15,611 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:15,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1429599649, now seen corresponding path program 23 times [2018-01-23 14:43:15,612 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:15,612 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:15,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:15,613 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:15,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:15,672 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49098 backedges. 17 proven. 15021 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2018-01-23 14:43:17,425 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:17,425 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:17,430 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:17,461 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,463 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,463 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,465 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,466 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,467 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,468 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,470 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,472 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,473 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,477 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,480 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,483 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,485 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,488 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,491 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,494 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,497 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,501 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,504 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,508 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,512 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,516 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,520 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,525 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,530 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,536 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,547 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,553 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,560 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,567 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,575 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,583 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,593 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,602 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,612 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,623 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,634 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,648 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,663 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:17,664 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:17,670 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49098 backedges. 24724 proven. 1311 refuted. 0 times theorem prover too weak. 23063 trivial. 0 not checked. Received shutdown request... [2018-01-23 14:43:18,453 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:18,453 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2018-01-23 14:43:18,453 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-23 14:43:18,454 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-23 14:43:18,454 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=1998, Unknown=0, NotChecked=0, Total=2652 [2018-01-23 14:43:18,455 INFO L87 Difference]: Start difference. First operand 198 states and 211 transitions. Second operand 52 states. [2018-01-23 14:43:18,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:43:18,456 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:43:18,459 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:43:18,459 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:43:18,459 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:43:18,459 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:43:18,459 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:43:18,459 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:43:18,459 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:43:18,459 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:43:18,459 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:43:18,460 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:43:18,460 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:43:18,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:43:18 BoogieIcfgContainer [2018-01-23 14:43:18,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:43:18,462 INFO L168 Benchmark]: Toolchain (without parser) took 41409.62 ms. Allocated memory was 303.0 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 262.0 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 280.9 MB. Max. memory is 5.3 GB. [2018-01-23 14:43:18,464 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 303.0 MB. Free memory is still 265.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:43:18,464 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.47 ms. Allocated memory is still 303.0 MB. Free memory was 260.0 MB in the beginning and 252.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:43:18,464 INFO L168 Benchmark]: Boogie Preprocessor took 29.88 ms. Allocated memory is still 303.0 MB. Free memory was 252.0 MB in the beginning and 250.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:43:18,465 INFO L168 Benchmark]: RCFGBuilder took 226.59 ms. Allocated memory is still 303.0 MB. Free memory was 250.0 MB in the beginning and 235.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:43:18,465 INFO L168 Benchmark]: TraceAbstraction took 40949.87 ms. Allocated memory was 303.0 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 235.0 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 253.9 MB. Max. memory is 5.3 GB. [2018-01-23 14:43:18,467 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 303.0 MB. Free memory is still 265.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 195.47 ms. Allocated memory is still 303.0 MB. Free memory was 260.0 MB in the beginning and 252.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 29.88 ms. Allocated memory is still 303.0 MB. Free memory was 252.0 MB in the beginning and 250.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 226.59 ms. Allocated memory is still 303.0 MB. Free memory was 250.0 MB in the beginning and 235.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 40949.87 ms. Allocated memory was 303.0 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 235.0 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 253.9 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was constructing difference of abstraction (198states) and interpolant automaton (currently 2 states, 52 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. TIMEOUT Result, 40.4s OverallTime, 26 OverallIterations, 144 TraceHistogramMax, 9.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 844 SDtfs, 1906 SDslu, 11613 SDs, 0 SdLazy, 4012 SolverSat, 145 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8725 GetRequests, 7870 SyntacticMatches, 0 SemanticMatches, 855 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7048 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 204 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 25.0s InterpolantComputationTime, 16317 NumberOfCodeBlocks, 14714 NumberOfCodeBlocksAsserted, 227 NumberOfCheckSat, 16268 ConstructedInterpolants, 0 QuantifiedInterpolants, 22315362 SizeOfPredicates, 41 NumberOfNonLiveVariables, 10989 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 49 InterpolantComputations, 3 PerfectInterpolantSequences, 528653/645592 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 21). Cancelled while IsEmpty was searching accepting run (input had 41 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-43-18-476.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-43-18-476.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-43-18-476.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-43-18-476.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-23_14-43-18-476.csv Completed graceful shutdown